tender document for solar power plant in gujarat part 2

(Sign and Seal of the bidder)

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TTeennddeerr ffoorr IInnssttaallllaattiioonn ooff SSoollaarr PPhhoottoovvoollttaaiicc SSyysstteemmss iinn tthhee SSttaattee ooff GGuujjaarraatt dduurriinngg tthhee yyeeaarr 22001122--1133..((PPaarrtt--22))

TTeennddeerr ffoorr IInnssttaallllaattiioonn ooff

SSoollaarr PPhhoottoovvoollttaaiicc SSyysstteemmss iinn tthhee SSttaattee ooff GGuujjaarraatt

dduurriinngg tthhee yyeeaarr 22001122--1133..

((PPaarrtt --22))

GGuujjaarraatt EEnneerrggyy DDeevveellooppmmeenntt AAggeennccyy

4th Floor, Block No.11 and 12, Udyog Bhavan, Sector - 11 Gandhinagar – 382 017, Gujarat, India

Phone : +91 79 23257251/2/3/4 Fax: +91 79 23257255, 23247097

website:www.geda.org.in

of 31 (Sign and Seal of the bidder)


TABLE OF CONTENTS for part -2 of the tender

7.0 TECHNICAL SPECIFICATIONS ............................................................................................................ 3

SOLAR PV ROOFTOP SYSTEM- 1kW, 2kW, 3kW, 5kW ........................................................................ 3

GRID CONNECT SOLAR POWER GENERATING SYSTEM ...................................................................... 8

SOLAR PV HOME SYSTEMS................................................................................................................ 21

SOLAR PV STREET LIGHTING SYSTEM ............................................................................................... 25

FINANCIAL BID GUIDELINES ................................................................................................................. 30

Annexure 7 : Price Bid .......................................................................................................................... 31

(Sign and Seal of the bidder)

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7.0 TECHNICAL SPECIFICATIONS SOLAR PV ROOFTOP SYSTEM- 1kW, 2kW, 3kW, 5kW DEFINITION Solar PV – AC hybrid power pack comprises of Solar PV modules, lead acid battery bank and intelligent on line inverter which feeds uninterrupted quality AC power to electrical loads taking energy from PV, grid or battery bank as the case may be. Batteries will be charged from solar energy as well as grid by multi stage charger integrated in the inverter or external charge controller.

Sr.No. Specification

i) DUTY CYCLE: The system should be designed to operate for specified Nos. hours and automatically switch to grid in case of non-sunshine days, under average daily insolation of 5 kWh/sq.m. on a horizontal surface.

6 Hours

For 1 kW system For 2 kW system For 3kW System For 5 kW system

ii) LOAD: The system should be connected to the Specified available load.

400 W 600 W 900kW 2000 W

iii) PV MODULE (S)

i. The PV module bidder should have IEC 61215-2nd Edition and IEC 61730-2 qualification certification for PV modules. ii. The PV module(s) shall contain crystalline silicon solar cells.

iii. The terminal box on the module should have a provision for opening for replacing the cable, if required. iv. Modules of minimum 200 W output each or above output should be used. v. A strip containing the following details should be laminated inside the module so as to be clearly visible from the front side.

a. Name of the Supplier or distinctive Logo b. Model or Type No. c. Serial No. d. Year of make. vi. Identification and traceability

Each PV module must use a RF identification tag (RFID), which must contain the following information: (i) Name of the manufacturer of PV Module and GEDA’s monogram (symbol). (ii) Name of the Manufacturer of Solar cells (iii) Month and year of the manufacture (separately for solar cells and module) (iv) Country of origin (separately for solar cells and module) (v) I-V curve for the module (vi) Peak Wattage, Im, Vm and FF for the module (vii) Unique Serial No and Model No of the module (viii) Date and year of obtaining IEC PV module qualification certificate (ix) Name of the test lab issuing IEC certificate (x) Other relevant information on traceability of solar cells and module as per ISO 9000 series.

The RFID can be inside or outside the module laminate, but must be able to withstand harsh environmental conditions.



iv) BATTERY Flooded electrolyte type, positive tubular plate, low maintenance lead acid battery. Following IEC/IS certificates are mandatory for the battery: (Copy to be provided with tender.) General Requirements & Methods of Test - IEC 61427 Tubular Lead Acid- IS 1651/IS 133369

Rating of the Battery

(a) The battery will have a minimum rating of 24V, 300 Ah (at C/10 at 27 o C) discharge rate or 48 V, 150 Ah (at C/10 at 27 o C) discharge rate, consisting of 2V cells. (b) 75% of the rated

capacity of the battery should be

between fully charged & load cut

off conditions.

(a) The battery will have a minimum rating of 24V, 600 Ah (at C/10 at 27 o

C discharge rate or 48 V, 300 Ah (at C/10 at 27 o

C) discharge rate, consisting of 2V cells. (b) 75% of the rated capacity of the battery should be between fully charged & load cut off conditions.

(a) The battery will have a minimum rating of 48 V, 500 Ah (at C/10 at 27 o C) discharge rate, consisting of 2V cells. (b) 75% of the rated capacity of the battery should be between fully charged & load cut off conditions.

(a) The battery will have a minimum rating of 48 V, 750 Ah (at C/10 at 27 o

C) discharge rate or 120V, 300 Ah (at C/10 at 27 o C) discharge rate, consisting of 2V cells. (b) 75% of the rated capacity of the battery should be between fully charged & load cut off conditions.

v) The power output of the module (s) under STC should be a minimum of - Mismatch amongst

modules <3%. - Tolerance in rated

power of modules: 3%

1000 W 2000W 3000 W 5000W



vi) ELECTRONICS The single phase bi-directional on line inverter shall provide AC power to the load, DC power to the battery bank and energy management to ensure that the battery will be remained in fully charged condition in all feasible circumstances. For Power Conditioners/Inverters* following certificates are mandatory: (Copy to be provided with tender.) Efficiency Measurements- IEC 61683 Environmental Testing- IEC 60068 2 (6,21,27,30,75,78) * Must additionally conform to the relevant national/international Electrical Safety Standards.

PCU specifications :

For 1 kW system For 2 kW system For 3kW System

For 5 kW system

Rating: 1 kVA 1kVA 1.5 kVA 3.5kVA

Waveform : Pure sine wave.

Pure sine wave.

Pure sine wave.

Pure sine wave.

Battery Voltage: 24/ 48 V DC nominal.

24/ 48 V DC nominal.

48 V DC nominal.

120 V DC nominal.

Charger Type : DSP/ PWM / MPPT technology.

DSP/ PWM / MPPT technology.



Output voltage: 230 V AC +/- 3%, 50 Hz

230 V AC +/- 3%, 50 Hz

230 V AC +/- 3%, 50 Hz

230 V AC +/- 3%, 50 Hz

Efficiency: 90% 90% 90% 90%

Overload capacity: 125% for 5 min

125% for 5 min

125% for 5 min

125% for 5 min

Necessary lengths of wires/cables and fuses should be provided and wiring of cables should be through the pole with no open access to cables.



vii) ELECTRONIC PROTECTIONS

a) Adequate protection is to be incorporated under over load conditions. b) The system should have protection against battery overcharge and deep discharge conditions. c) Fuses should be provided to protect against short circuit conditions. d) A blocking diode should be provided as part of the electronics, to prevent reverse flow of current through the PV module (s), in case such

a diode is not provided with the solar module (s). e) Full protection against open circuit accident, short circuit and reverse polarity should be provided.

viii) MECHANICAL HARDWARE

a) The material should be rust proof and long lasting preferably hot dip galvanized iron. The frame structure should have provision to adjust

its angle of inclination to the horizontal between 0 and 45, so that it can be installed at the specified tilt angle in the desired direction. b) The structure should be able to with stand wind speeds up to 150 kmph. c) The Battery rack made up of angles with wooden base and sides covered with net or ventilated MS sheet of minimum 18 SWG. All

hardware, nuts, bolts should be cadmium passivated. d) Detailed drawings with specifications of each component should be submitted with the Technical Bid.

ix) OTHER FEATURES

a) The system should be provided with 2 LED indicators a green light to indicate charging in progress and a red LED to indicate deep

discharge condition of the battery. The green LED should glow only when the battery is actually being charged. b) There will be a Name Plate on the system which will give c) Name of the Supplier or Distinctive Logo d) Serial Number

e) Components and parts used in the solar rooftop systems should conform to the latest BIS specifications, whenever such specifications

are available and applicable. f) The PV module (s) will be warranted for a minimum period of 25 years from the date of supply.



g) The Warranty Card to be supplied with the system must contain the details of the system supplied, as given in the Appendix-I. The Suppliers can also provide additional information about the system and conditions of warranty as necessary.

h) An Operation, Instruction and Maintenance Manual, in English and the local language should be provided with the system. i) The following minimum details must be provided in the manual:

I. About Photovoltaics II. About solar rooftop system – its components and expected performance.

III. About PV module IV. About CFL V. About battery

VI. Clear instructions about erection of pole and mounting of PV module and lamp housing assembly on the pole. VII. About electronics

VIII. About charging and significance of indicators. IX. DO’s and DONT’s X. Clear instructions on regular maintenance and trouble shooting of solar rooftop system.

XI. Name and address of the contact person in case of non-functionality of the solar rooftop system.

x) BILL OF MATERIAL The bidder should provide the bill of material mentioning the quantity of each of the item consisting in each system, along with the offer.



GRID CONNECT SOLAR POWER GENERATING SYSTEM

I DEFINITION The Grid Connect Solar Power Generating System consists of mainly three components viz. the solar photovoltaic (SPV) array, module mounting structure and the power conditioning unit (PCU)/ inverter. The SPV array converts the solar energy into DC electrical energy. The module mounting structure holds the modules in required position and the DC electrical energy is converted to AC power by the PCU, which is connected to the power grid. The AC power output of the inverter is fed to the AC distribution board through metering panel and isolation panel. The 415 V AC output-3Ø of the system can be utilized or as an option it could be stepped up to the required voltage level and after synchronizing with the grid, can be exported to the grid. II PV MODULE (S)

i) The PV module bidder should have IEC 61215-2nd Edition and IEC 61730-2 qualification certification for PV modules. Copy to be provided with tender.

ii) The PV module(s) shall contain crystalline silicon solar cells. iii) All materials used shall have a proven history of reliable and stable operation in external applications. It shall perform satisfactorily in

relative humidity up to 100% with temperatures between -10 Deg C and +85 Deg C and with stand gust up to 200km/h from back side of the panel. The terminal box on the module should have a provision for opening for replacing the cable, if required.

iv) A strip containing the following details should be laminated inside the module so as to be clearly visible from the front side. b. Name of the Supplier or distinctive Logo c. Model or Type No. d. Serial No. e. Year of make. v) Modules of minimum 200 W output each or above output should be used. Photo / electrical conversion efficiency of SPV module shall be

greater than 13.5%. vi) IDENTIFICATION AND TRACEABILITY

Each PV module must use a RF identification tag (RFID), which must contain the following information: (i) Name of the manufacturer of PV Module and GEDA’s monogram (symbol). (ii) Name of the Manufacturer of Solar cells (iii) Month and year of the manufacture (separately for solar cells and module)



(iv) Country of origin (separately for solar cells and module) (v) I-V curve for the module (vi) Peak Wattage, Im, Vm and FF for the module (vii) Unique Serial No and Model No of the module (viii) Date and year of obtaining IEC PV module qualification certificate (ix) Name of the test lab issuing IEC certificate (x) Other relevant information on traceability of solar cells and module as per ISO 9000 series. The RFID can be inside or outside the module laminate, but must be able to withstand harsh environmental conditions.

III EARTHING AND SURGE PROTECTIONS

Surge Protection Device (SPD): Internal surge protection shall consist of three MOV type arrestors connected from +ve and –ve terminals to earth (via Y arrangement) for higher withstand of the continuous PV-DC voltage during earth fault condition. SPD shall have safe disconnection and short circuit interruption arrangements through integrated DC in-built bypass fuse (parallel) which should get tripped during failure mode of MOV, extinguishing DC arc safely in order to protect the installation against fire hazards. Nominal discharge current (In) at 8/20 micro seconds shall be minimum 10 kA with maximum discharge (Imax) at 8/20 micro seconds minimum 20 kA with visual indication (through mechanical flag) in modules to monitor the life of SPD.

EARTHING FOR PV ARRAY

The photovoltaic modules, BOS and other components of power plant requires adequate earthing for protecting against any serious faults as guided by IEC 60364.

The earthing for array and LT power system shall be made with GI pipe, 4.5 m long 40 mm diameter including accessories, and providing masonry enclosure with cast iron cover plate having locking arrangement, watering pipe using charcoal or coke and salt as required as per provisions of IS: 3043.

Necessary provision shall be made for bolted isolating joints of each earthing pit for periodic checking of earth resistance.

Each string/ array and MMS of the plant shall be grounded properly. The array structures are to be connected to earth pits as per IS standards. Necessary provision shall be made for bolted isolating joints of each earthing pit for periodic checking of earth resistance.

Sr.No. Specification For 10 kW system

For 15 kW system For 20 kW system

For 25 kW system

1 The power output of the module (s) under STC

should be a minimum of

10,000W 15,000 W 20,000 W 25,000 W



The complete earthing system shall be mechanically & electrically connected to provide independent return to earth.

For each earth pit, a necessary test point shall be provided.

In compliance to Rule 11 and 61 of Indian Electricity Rules, 1956 (as amended up to date), all non-current carrying metal parts shall be earthed with two separate and distinct earth continuity conductors to an efficient earth electrode.

The Bidder shall submit the detailed specifications of the array earthing. LIGHTNING PROTECTION FOR PV ARRAY

The source of over voltage can be lightning or other atmospheric disturbance. Main aim of over voltage protection is to reduce the over voltage to a tolerable level before it reaches the PV or other sub-system components as per IEC 60099.

Necessary concrete foundation for holding the lightning conductor in position to be made after giving due consideration to shadow on PV array, maximum wind speed and maintenance requirement at site in future.

The lightning conductor shall be earthed through flats and connected to the earth mats as per applicable Indian Standards with earth pits. Each lightning conductor shall be fitted with individual earth pit as per required Standards including accessories, and providing masonry enclosure with cast iron cover plate having locking arrangement, watering pipe using charcoal or coke and salt as required as per provisions of IS.

If necessary more numbers of lightning conductors may be provided.

The Bidder shall submit the drawings and detailed specifications of the PV array lightning protection equipment. IV MECHANICAL COMPONENTS (i) Metallic frame structure of galvanized steel with stands to be fixed on the roof of the building to hold the SPV module (s) one feet above

roof level. The frame structure should have provision to adjust its angle of inclination to the horizontal between 0 and 45, so that it can be installed at the specified tilt angle i.e. inclined at 25 degree to horizontal facing due south. All hardware, nuts, bolts should be cadmium passivated.

V OTHER FEATURES (i) The PV module (s) will be warranted for a minimum period of 10 years from the date of supply. (ii) An Operation, Instruction and Maintenance Manual in English and the local language should be provided with the system.

The following minimum details must be provided in the Manual (a) About Photovoltaics (b) About solar PV system – its components and expected performance.



(c) About PV module (d) Clear instructions about mounting of PV module (s) (e) About electronics (f) DO’s and DONT’s (g) Clear instructions on regular maintenance and trouble shooting of solar power plant. (h) Name and address of the person or service center to be contacted in case of failure or complaint.

The details of the Power Conditioning Unit are as given below: For Power Conditioners/Inverters* following certificates are mandatory: (Copy to be provided with tender.) Efficiency Measurements- IEC 61683 Environmental Testing- IEC 60068 2 (6,21,27,30,75,78) * Must additionally conform to the relevant national/international Electrical Safety Standards.

Purpose The power conditioner unit shall convert DC produced by SPV array and adjust the voltage & frequency levels to suit the Grid.

Grid supervision All three phases shall be supervised with respect to rise / fall in programmable threshold values of frequency & the power section of the plant. The plant shall get disconnected / connected from the grid in case of a grid fault / after normal grid conditions have resumed. The grid supervision must comply with VDEW or other relevant/equivalent regulations.

Type & technology IGBT based. Utilize a circuit topology and components suitable for meeting the specifications.

Output voltage on AC side

415 +10%, - 15% V AC A dedicated isolation transformer housed in the PCU enclosure shall be supplied to match the PCU output voltage to the utility grid voltage. PCU/ Solar Inverter voltage range should be reconfigured as per site requirements.

Sr.No. Specification For 10 kW system For 15 kW system For 20 kW system

For 25 kW system

1 PCU rating (NOMINAL) 10 kW/10 kVA VAC, grid

interactive output

15 kW/15kVA VAC, grid interactive

output

20 kW/20kVA VAC, grid

interactive output

25 kW/25kVA VAC, grid interactive output



Output voltage 415 V ,50 Hz AC

Output Frequency 50 + 1.5Hz, - 3.5 Hz

DC system voltage The electrical safety of the array installation is of the utmost importance. Array electrical configuration shall be in such a way that, the MPPT shall operate with maximum efficiency, between the low and high temperature of the site.

Maximal Current ripple

5% PP

Power Factor 0.95 inductive to 0.95 capacitive

Ambient room temperature

5 to 55 deg C

Housing Cabinet a) PCU is housed in suitable switch cabinet, with min IP 21 degree of Ingress Protection. b) Weatherproof, rodents & insect proof c) Components and circuit boards mounted inside the enclosures clearly identified with appropriate permanent designations, which shall also serve to identify the items on the supplied drawings. d) All doors, covers, panels and cable exists shall be gasketed or otherwise designed to limit the entry of dust and moisture. All doors shall be equipped with locks. All openings shall be provided with grills or screens with openings no larger than 0.95 cm (about 3x8 inch).

Other important features

Electrical safety Protections a)General b) Over/under voltage

The PCU shall include appropriate self protective and self diagnostic feature to protect itself and the PV array from damage in the event of PCU component failure or from parameters beyond the PCU’s safe operating range due to internal or external causes. The self-protective features shall not allow signals from the PCU front panel to cause the PCU to be operated in a manner which may be unsafe or damaging. Faults due to malfunctioning within the PCU, including commutation failure, shall be cleared by the PCU protective devices and not by the existing site utility grid service circuit breaker. a)Mains (Grid) over-under voltage and frequency protection.



c) Fool Proof Protection d) Accidental open circuit e) Internal Faults f) Galvanic Isolation

b) Over voltage protection against atmospheric lightning c) Protection against voltage fluctuations in the grid itself and internal faults in the power conditioner, operational errors and switching transients. Against ISLANDING. Note : MOV type surge arrestors on AC and DC terminals for over voltage protection from lightning-induced surges Full protection against accidental open circuit and reverse polarity at the input. Inbuilt protection for internal faults including excess temperature, commutation failure, overload and cooling fan failure is obligatory Galvanic isolation is provided to avoid any DC component being injected into the grid and the potential for AC components appearing at the array.

- Galvanic isolation shall be provided between the inverter/ PCU and grid to avoid any DC component being injected into the grid and the potential for AC components appearing at the array.

- The specification of the isolation transformer shall be as follows:

Capacity: 125% of capacity of the PV modules (i.e. a 12.5 kVA transformer shall be used for a 10 kW PV system, and so on)

System: 3-phase, 4-wire

Input voltage range: 320-480 V AC

Output voltage range: 380-435 V AC

Output voltage for single phase: 220-240 V AC

Tap change: Manual, V+/-20%, V+/-10%, V+/-0%

Operating frequency: 48-52 Hz

Efficiency; >98.5%

Impedance: 4-10%

Output waveform: Zero distortion

Insulation class: Class F

Leakage current: <20 mA

Cooling: AN



g) Earth Fault

Supervision h) Disconnection &

Islanding

Enclosure: IP 21 (if indoors) IP 54 (if outdoors)

Normal Operating Temperature: 0-60°C

Cable entry: Separate input/ output enclosed cable entry

Standard: IS 2026 - Further, it is also observed at various locations throughout the distribution grid that the grid

voltage would consistently be greater or less than the acceptable voltage window of many inverters and PCUs. Moreover, this variation may be only for particular days of a week, seasonal, or for a limited time.

- In such a case, the Contractor shall study/ measure the point of interconnection of the PV system consistently for at least one week to identify the voltage range experienced at the interconnection point of the distribution grid.

Consequently, the Contractor shall adjust the input/ output of the isolation transformer to appropriate tap settings so that the voltage on the inverter side of the transformer is always within the acceptable voltage window of the inverter. The appropriate tap setting shall be conveyed to GEDA by the contractor. An integrated earth fault detection device is provided to detect eventual earth fault on DC side and shall send message to the supervisory system Disconnection of the PV generator in the event of loss of the main grid supply is achieved by in built protection within the power conditioner. This may be achieved through rate of change of current, phase angle, unbalanced voltages, or reactive load variants. Operation outside the limits of power quality as described in technical data sheet shall cause the power conditioner to disconnect the grid. Additional parameters requiring automatic disconnection are: Neutral voltage displacement Over current Earth fault & Reverse power In each of the above cases, tripping time shall be less than 0.5 seconds. Response time in case of



i) Automatic reconnection after the Grid failure is resorted.

grid failure due to switch off or failure based shutdown should be well within 60 seconds. PCU has facility to reconnect the Inverter automatically to the grid following restoration of grid, subsequent to grid failure condition.

Array Ground fault Provided

Operator interface LCD and keypad operator interface, Menu driven.

Fault conditions Automatic fault conditions reset for all parameters like voltage, frequency and /or black out.

Control Logic Failure detection

via watch dog timers.

Parameter access All parameters accessible through an industry standard communication link.

DC-AC conversion efficiency

93% for output ranging from 20% to full load Idling current at no load shall not exceed 2% of the full load current.

DC isolation Provided at the output by means of a suitable isolating transformer

Parallel operation with Grid

Provided & capable of interrupting line-to-line fault currents and line to ground fault currents.

Unbalanced output load

PCU is able to withstand an unbalanced output load to the extent of 30%.

Shut down / Standby mode

Shut down / standby mode with its contact open under the following conditions before attempting an automatic restart after an appropriate time delay; in sufficient solar power output. a) Insufficient solar power input : When the power available from the PV array is insufficient to supply the losses of the PCU, the PCU shall go to a standby/shutdown mode. The PCU control shall prevent excessive cycling during rightly shut down or extended periods of insufficient solar radiation. b) Utility -Grid over or under voltage : The PCU shall restart after an over or under voltage shutdown when the utility grid voltage has returned to within limits for a minimum of two minutes. c) Utility-Grid over or under frequency : The PCU shall restart after an over or under frequency shutdown when the utility grid voltage has returned to the within limits for minimum of two minutes.

PCU generated harmonics

Shall not exceed a total harmonic current distortion of 5%, a single frequency current distortion of 3%, and single frequency current distortion of 1%, when the first through the fiftieth integer



harmonics of 50Hz are considered.

Circuit separation High voltage & power circuits separated from low voltage & control circuits.

Internal wiring Standard Cu wiring, with flame resistant insulation .

Cabling practice a) Cables :PVC Cu cables as per relevant international Standards) b) Cable connections : suitable terminations c) PVC channel with covers to house the cables.

High voltage test PCU with stand high voltage test of 2000 Vrms between either the input or the output terminals and the cabinet (chassis).

EMI (Electromagnetic interface)

PCU shall not produce EMI which cause malfunctioning of electronic & electrical instruments including communication equipments which are located within the facility in which the PCU is housed.

Display on front panel & indicators

a) instantaneous PCU ac power output and the DC voltage current and power input b) Accuracy of display : 3% of full scale factor or better c) Display visible from outside the PCU enclosure. d) Operational status of the PCU, alarms, trouble indicators and AC and DC disconnect switch positions shall also be communicated by appropriate messages or indicator lights on the front cover of the PCU enclosure.

Emergency OFF Emergency OFF button is located at an appropriate position on the unit

Grounding PCU includes ground lugs for equipment and PV array groundings. The DC circuit ground is a solid single point ground connection.

Exposed surfaces Exposed surfaces of ferrous parts are thoroughly cleaned, primed, and painted and suitably protected to survive a nominal 30 years design life of the unit.

Factory Testing a) Tested to demonstrate operation of its control system and the ability to be automatically synchronized and connected in parallel with a utility service, prior to its shipment. b) Operation of all controls, protective and instrumentation circuits demonstrated by direct test if feasible or by simulation operation conditions for all parameters that can not be directly tested. c) Demonstration of utility service interface protection circuits and functions, including calibration and functional trip tests of faults and isolation protection equipment. d) Operation of start up , disconnect and shutdown controls also to be tested and demonstrated, stable operation of the PCU and response to control



signals shall also be tested and demonstrated. e) Factory testing include measurement of phase currents, efficiencies, harmonic content and power factor. All tests shall be performed 25, 50, 75 and 100% of the rated nominal power. f) Factory test report (FTR) : Should be supplied with the unit after all tests. The FTR shall include detailed description of all parameters tested qualified and warranted.

Operating Modes a) Night or sleep mode : where the Inverter is almost completely turned off, with just the timer and control system still in operation, losses < 2 W per 5 kW b) Standby mode: where the control system continuously monitors the output of the solar generator until pre-set value is exceeded (typically 10 W). Operational of MPP tracking mode: the control system continuously adjust the voltage of the generator to optimize the power available. The power conditioner shall automatically re-enter standby mode input power reduces below the standby mode threshold. Front panel display providing the status of the PCU, including AC power output & DC current voltage and power input, and unit fault indication.

Codes & Standards The quality of equipment supplied shall be controlled to meet the guidelines for engineering design included in the standards and codes listed in the relevant ISI and other standards, such as : a) IEEE 928: Recommended Criteria for terrestrial PV power systems. b) IEEE 929 Recommended practice for utility interface of residential and intermediate PV systems. c) IEEE 519 Guide for harmonic control and reactive compensation of Static Power Controllers. d) National Electrical NFPA 70-1990 (USA) or equipment national standard. e) National Electrical Safety Code ANSI C2 (USA) or equipment national standard.

Inverter / Array Size ratio

The ratio of the Inverter continuous power rating and the array peak power rating shall be between 80 to 90% or any other value found suitable. This is because better overall annual yield can be obtained by allowing the Inverter to operate for longer periods closer to optimal efficiency. Inverter efficiency should exceed 90% except when operating at less than 10% of maximum output.

MPPT Maximum power point tracker is integrated in the power conditioner unit to maximize energy drawn from the array. The MPPT shall be micro processor based to minimize power losses. The MPPT shall have provision (manual setting) for constant voltage operation.



Metering a) PV array energy production: Meter to log the actual amount of AC energy generated / consumed by the PV system shall have to be provided. b) Solar irradiance : An integrating pyranometer (Class II or better) to be provided, with the sensor mounted in the plane of the array. Readout shall be integrated with data logging,

Data Logging System a) All major parameters available on the digital bus and logging facility for energy auditing through the internal microprocessor and can be read on the digital front panel at any time the current values, previous values for up to a month and the average values. The following parameters shall be accessible via the operating interface display :

AC voltage

AC output current

Output power

DC input voltage

DC input current

Time active

Time disabled

Time Idle

temperatures (C)

Converter status Protective function limits (VIZ-AC over voltage, AC under voltage, Over frequency, under frequency, ground fault, PV starting voltage, PV stopping voltage, over voltage delay, under voltage delay over frequency, ground fault delay, PV starting delay, PV stopping delay.

Remote Monitoring System

- A remote monitoring system shall be included with each photovoltaic system. - Usually such monitoring systems are connected and synchronized with the inverters. - Such monitoring services are provided by many leading inverter manufacturers and also third

party service providers. - The monitoring system should transmit the following data in real-time to a central server and

store it:

DC currents, voltages and power.

AC currents, voltages and power.

Irradiation, ambient temperature, module temperature and wind speed.

Error logs.



- This data may be transmitted either using the available LAN or GSM/ GPRS, or any other mode of connectivity available at the site.

- The contractor shall be responsible for data connectivity for monitoring up to the warranty/ O&M period of the PV system, after which, the Contractor shall transfer all ownership rights, SIM card, account information, instructions, etc. to GEDA.

- The contractor shall ensure that GEDA is aware of the contracts required to maintain connectivity post-warranty/ O&M period.

- This data shall be accessible by GEDA through a secure login account. - The stored data should be represented through hourly, daily, monthly, etc. graphs and easily

downloadable in .csv or .xls format.

CABLES & ACCESSORIES For Cables & Accessories following certificates are mandatory: (Copy to be provided with tender.) General Test and Measuring Methods PVC insulated cables for working Voltages up to and including 1100 and UV resistant for outdoor installation

IEC 60189 IS 694/ IS 1554 IS/IEC 69947

All the cables which shall be supplied shall be conforming to IS 1554 / 694 Part 1 of 1988 & shall be of 650 V/ 1.1 kV grade as per requirement. Only PVC copper cables shall be used. The size of the cables between array interconnections, array to junction boxes, junction boxes to PCU etc shall be so selected to keep the voltage drop and losses to the minimum. Certification of cables should be submitted in the tender.

CONTROL ROOM

The required control room shall be constructed at additional cost if required. Otherwise, PCU/ Solar Inverter should be placed/ mounted in suitable housing.

SPARE PARTS

One set of essential spares for the PCU shall be provided and made available at the plant.



DOCUMENTATION

Two sets of installation manual / user manual shall be supplied along with the each power plant. The manual shall include complete system details such as array lay out, schematic of the system, inverter details, working principle etc. Step by step maintenance and trouble shooting procedures shall be given in the manuals.

Module layout drawing has to be submitted to GEDA for each site.

7 nos. set of line diagram and licensed electrical contractors’ certificate has to be submitted for each site.

BILL OF MATERIAL

The bidder should provide the bill of material for grid connect SPV power plant mentioning the quantity of each of the item consisting in the system, along with the offer.

SHADOW ANALYSIS

The shadow analysis of each site has to be carried out by bidder and shall be submitted to GEDA, after placement of work order.



SOLAR PV HOME SYSTEMS

1. DEFINITION A solar PV home system aims at providing solar electricity for operating lights and/or fan or energizing a DC operated portable TV set for specified hours of operation per day.

MODEL – 2 (2 Lights)

Component Specifications

PV Module 1x37 Wp under STC

Lamps 2xCFLs (9W/11W)

Battery 1x12V, 40 AH Tubular Plate, low maintenance type Lead Acid Battery

Other Components Control electronics, Module mounting hardware, Battery box, Inter-connecting wires/cables, switches, Operation, instruction and maintenance manual

Notes : i) Small white LED may be provided as an optional feature, with an independent switch.

2. DUTY CYCLE

MODEL AVERAGE HOURS OF OPERATION/DAY

Model 2 2 Lights, 3-4 Hours

3. LAMPS

(i) The lamps will be of compact fluorescent (CFL) type, either 4 – Pin or 2 Pin types with ratings of 9W. For the 4 Pin type CFLs, a suitable pre-heating circuit must be provided.

(ii) The light output from the lamps should be around 600 +/- 5% lumens (for 9W CFL). Also please see (iii) of VI given below. (iii) The lamps should be housed in an assembly suitable for indoor use, with a reflector on its back. While fixing the assembly, the lamp

should be held in a base up configuration.



4. BATTERY Following IEC/IS certificates are mandatory for the battery: (Copy to be provided with tender.) General Requirements & Methods of Test - IEC 61427 Tubular Lead Acid- IS 1651/IS 133369

(i) The battery will be of flooded electrolyte type positive tubular plate, low maintenance lead acid battery. (ii) The battery will have a minimum rating of 12V, 40 Ah (at C/10) discharge rate depending on Model. (iii) 75% of the rated capacity of the battery should be between fully charged and load cut off conditions.

5. ELECTRONICS 1. The inverter should be of quasi sine wave/sine wave type, with frequency in the range of 20-35 KHz Half-wave operation is not

acceptable. 2. The total electronic efficiency should be at least 80%. 3. No blackening or reduction in the lumen output by more than 10% should be observed after 1000 ON/OFF cycles (two minutes ON

followed by four minutes OFF is one cycle. 4. The idle current consumption should not be more than 10 ma

5. Electronics should operate at 12 V and should have temperature compensation for proper charging of the battery through out the year. 6. 2.5 sq.mm., 2 core, multi strand copper cable of 20 mtr length for Solar Home Systems Model 2 should be provided. Switches suitable

for DC use and fuses should be provided. All wiring shall be concealed in Rigid PVC pipe/ PVC patti as per the requirement of site.

7. PV MODULE (S) (a) The PV module (s) shall contain crystalline silicon solar cells. (b) The PV module bidder should have IEC 61215-2nd Edition and IEC 61730-2 qualification certification for PV modules. Copy to be provided with tender.

(c) The power output of the module (s) under STC should be a minimum of 37 W. (d) The operating voltage corresponding to the power output mentioned above should be 16.4V (e) The open circuit voltage of the PV modules under STC should be at least 21.0 Volts. (f) The terminal box on the module should have a provision for opening for replacing the cable, if required. (g) A strip containing the following details should be laminated inside the module as as to be clearly visible from the front side.

a) Name of the Bidder or distinctive Logo b) Model or Type No. c) Serial No.



d) Year of make.

8. ELECTRONIC PROTECTIONS (i) Adequate protection is to be incorporated under no load conditions, e.g. when the lamps are removed and the system is switched ON. (ii) The system should have protection against battery overcharge and deep discharge conditions. (iii) Fuses should be provided to protect against short circuit conditions. (iv) A blocking diode should be provided as part of the electronics, to prevent reverse flow of current through the PV module (s) in case such

a diode is not provided with the PV module (s). (v) Full protection against open circuit, accidental short circuit and reverse polarity should be provided.

9. MECHANICAL COMPONENTS (i) Metallic frame structure (with corrosion resistance epoxy paint) with 25 mm X 25 mm X 3 mm MS angle with stands to be fixed on the

roof of the house to hold the SPV module (s) one feet above roof level. The frame structure should have provision to adjust its angle of inclination to the horizontal between 0 and 45, so that it can be installed at the specified tilt angle. All hardware, nuts, bolts should be cadmium passivated.

(ii) The battery box provided should be of a vented (pp-cp material) plastics/ metallic with acid proof corrosion resistance epoxy paint for housing the storage battery indoors. The thickness of MS Sheet of battery box shall be of minimum 22 SWG with locking arrangements.

(iii) DISPLAY BOARD: A display board should be installed in the village/ hamlet near community building, of min. size 4’ x 3’ on two poles. MS Sheet of board shall be of minimum 22 SWG. The text should include GEDA address as well as Manufacturer’s name and address, Phone, fax and mobile number for immediate contact in case of any failure of systems. The board should be spray painted, with vinyl letter pasting.

10. OTHER FEATURES

(i) The system should be provided with 2 LED indicators: a green light to indicate charging in progress and a red LED to indicate deep discharge condition of the battery. The green LED should glow only when the battery is actually being charged.

(ii) There will be a Name Plate on the system which will give : (a) Name of the Bidder or Distinctive Logo (b) Serial Number

(iii) Components and parts used in solar home systems should conform to the latest BIS specifications, whenever such specifications are available and applicable.

(iv) The PV module (s) will be warranted for a minimum period of 10 years from the date of supply and the solar home system (including the battery) will be warranted for a period of five years from the date of supply.



The Warranty Card to be supplied with the system must contain the details of the system supplied as given in the Appendix-I. The Bidder can also provide additional information about the system and conditions of warranty as necessary.

(v) An Operation, Instruction and Maintenance Manual in English and the local language should be provided with the system. The following minimum details must be provided in the Manual (a) About Photovoltaics (b) About solar home system – its components and expected performance. (c) About PV module (d) About CFL (e) About battery (f) Clear instructions about mounting of PV module (s) (g) About electronics (h) About charging and significance of indicators. (i) DO’s and DONT’s (j) Clear instructions on regular maintenance and trouble shooting of solar home system. (k) Name and address of the person or service center to be contacted in case of failure or complaint.



SOLAR PV STREET LIGHTING SYSTEM

1. DEFINITION A standard alone solar photovoltaic street lighting system comprises a compact fluorescent lamp, lead acid battery, PV module(s), control electronics, inter-connecting wires/cables, module mounting hardware, battery box, operation instruction and maintenance manual.

2. DUTY CYCLE The system should be designed to automatically switch ON at dusk, operate throughout the night and automatically switch OFF at the dawn, under average daily insolation of 5 kWh/sq.m. on a horizontal surface.

3. LAMP (i) The lamp will be of compact fluorescent (CFL) type, either 4 – Pin or 2 Pin type, with a rating of 2 x 11W. For the 4 – Pin type CFL,

adequate pre-heating circuit must be provided. (ii) The light output from the lamp should be around 1800 +/- 5% lumens. Also please see (iii) of V given below. (iii) The lamp should be housed in a weather proof assembly suitable for outdoor use, with a reflector on its back. While fixing the

assembly, the lamp should be held in a base up configuration. OR

3. LED fixture -Specifications for 16W/18W LED Street Light: (Supporting Documents Required) 1. LED Type: High power of 1 W each

2. Power Consumption: 16W/18W ± 10%, maximum 1.35 W per LED with 85% driver efficiency.

3. Luminous flux efficacy ≥ 110 lm/Watt

4. Color Rendering Index ≥ 75

5. Color Temperature : 5500 K- 7500 K (White)

6. Circuit Efficiency : ≥ 85%

7. Life expectancy/Lumen maintenance : 50000 burning hours at ambient temperature with 70% Lumen maintenance

8. Construction : IP 65

9. Control Circuit : Compatible with LED

10. Operating temperature : - 40 0 C to 59 0 C

Following testing parameters shall be carried out at National/NABL accredited laboratory (For luminaries):



1. Marking

2. Luminaire Power

3. Circuit Efficiency

4. Polar Curve

5. Chromaticity co-ordinates and correlated color temperature

6. Color Rendering Index

Note: 1) Polar curve is a lux distribution pattern which shows whether the luminaire matches Pole height and pole span.

4. BATTERY Following IEC/IS certificates are mandatory for the battery: (Copy to be provided with tender.) General Requirements & Methods of Test - IEC 61427 Tubular Lead Acid- IS 1651/IS 13369 (i) Flooded electrolyte type, positive tubular plate, low maintenance lead acid battery. (ii) The battery will have a minimum rating of 12V, 100 Ah/ 100Ah (at C/10) discharge rate. (iii) 75% of the rated capacity of the battery should be between fully charged and load cut off conditions.

5. ELECTRONICS (i) The inverter should be of quasi sine wave/sine wave type, with frequency in the range of 20-35 KHz-Half-wave operation is not

acceptable. (ii) The total electronic efficiency should be at least 85% (iii) No blackening or reduction in the lumen output by more than 10% should be observed after 1000 ON/OFF cycles (two minutes ON

followed by four minutes OFF is one cycle. (iv) The idle current consumption should not be more than 10mA. (v) Electronics should operate at 12 V and should have temperature compensation for proper charging of the battery through out the year. (vi) Necessary lengths of wires/cables and fuses should be provided and wiring of cables should be through the pole with no open access to

cables. (vii) The PV module will be used to sense the ambient light level for switching ON and OFF the lamp. 6. ELECTRONIC PROTECTIONS

(i) Adequate protection is to be incorporated under no load conditions e.g. when the lamp is removed and the system is switched ON.



(ii) The system should have protection against battery overcharge and deep discharge conditions. (iii) Fuses should be provided to protect against short circuit conditions. (iv) A blocking diode, should be provided as part of the electronics, to prevent reverse flow of current through the PV module (s), in case

such a diode is not provided with the solar module (s). (v) Full protection against open circuit accident, short circuit and reverse polarity should be provided.

7. PV MODULE (S) a. The PV module (s) shall contain crystalline silicon solar cells. b. The PV module bidder should have IEC 61215-2nd Edition and IEC 61730-2 qualification certification for PV modules. Copy to be provided with tender.

c. The power output of the module (s) under STC should be a minimum of 120 W. d. The operating voltage corresponding to the power output mentioned above should be 16.4V e. The open circuit voltage of the PV modules under STC should be at least 21.0 Volts. f. The terminal box on the module should have a provision for opening for replacing the cable, if required. g. A strip containing the following details should be laminated inside the module as as to be clearly visible from the front side.

1. Name of the Bidder or distinctive Logo 2. Model or Type No. 3. Serial No. 4. Year of make.

8. MECHANICAL HARDWARE (i) Metallic frame structure (with corrosion resistance paint) with 25 mm X 25 mm X 3 mm MS angle to be fixed on the top of the poll to

hold the SPV module (s). The frame structure should have provision to adjust its angle of inclination to the horizontal between 0 and 45, so that it can be installed at the specified tilt angle in the desired direction.

(ii) The pole should be made of GI medium class pipe with a height of minimum 7 meters & 6 mtrs above the ground level after grouting (details shall be furnished in the offer) and final installation. The pole, will be consisting of three portions with lower portion (length 4 m) of 114.3 mm dia. with wall thickness of 3.65 mm, and middle portion (length 1.5 m) of 88.9 mm dia with wall thickness of 3.25 mm and top portion (length 1.5 m) of 76.1 mm dia. with wall thickness of 3.25 mm and base plate of 175 mm X 175 mm X 6 mm. The 1 ½ inch dia. bend pipe for fixing up the lamp assembly with suitable clamps to mount on the pole should be G.I. medium class pipe and should be adjustable. The pole should have the provision to hold the weather proof lamp housing. It should be painted with a corrosion resistant paint.

(iii) The battery box provided should be of a vented metallic with acid proof corrosion resistance paint (epoxy paint) for housing the storage battery outdoors with locking arrangement. The battery box should be tightly clamped with the pole. The thickness of MS Sheet of battery box shall be of minimum 18 SWG. All hardware, nuts, bolts should be cadmium passivated.



(iv) The grouting of the pole should be done by PCC 1:2:3, pit must be 0.3 X 0.3 X 1 m deep below ground level and a collar of 0.3 m above ground level must be of 0.3 m dia.

(v) Detailed drawings with specifications of each component should be submitted with the Technical Bid.

9. OTHER FEATURES (i) The system should be provided with 2 LED indicators a green light to indicate charging in progress and a red LED to indicate deep

discharge condition of the battery. The green LED should glow only when the battery is actually being charged. (ii) There will be a Name Plate on the system which will give

(a) Name of the Supplier or Distinctive Logo (b) Serial Number

(iii) Components and parts used in the solar street lighting systems should conform to the latest BIS specifications, whenever such specifications are available and applicable.

(iv) The PV module (s) will be warranted for a minimum period of 10 years from the date of supply and the street lighting system (including the battery) will be warranted for a period of two years from the date of supply.



General Conditions: applicable to all the systems.

PV modules used in solar power plants/systems must be warranted for their output peak watt capacity, which should not be less than 90% at the end of 12 years and 80% at the end of the 25 years.

The BoS items/components of the SPV power plants/systems deployed must confirm to the latest edition of IEC/equivalent BIS standards as specified below:

BoS item/component Applicable IEC/equivalent BIS Standard

Standard Description Standard Number

Power Conditioners/Inverters*

Efficiency Measurements Environmental Testing

IEC 61683 IEC 60068 2 (6,21,27,30,75,78)

Charge controller/MPPT units*

Design Qualification Environmental Testing

IEC 62093 IEC 60068 2 (6,21,27,30,75,78)

Storage Batteries General Requirements & Methods of Test Tubular Lead Acid

IEC 61427 IS 1651/IS 13369

Cables General Test and Measuring Methods PVC insulated cables for working Voltages up to and including 1100 VDo-, UV resistant for outdoor installation

IEC 60227/IS 694 IEC 60502/ IS 1554(part I & II)

Switches/ Circuit Breakers/Connectors

General Requirements Connectors -safety IS/IEC 60947 part I,II,III EN 50521

Junction Boxes/Enclosures for inverter/ charge controller/ luminaries

General Requirements Enclosures IP 54 (for outdoor)/IP 21 (for indoor) as per IEC 529

* Must additionally conform to the relevant national/international Electrical Safety Standards.



PART - II

FINANCIAL BID GUIDELINES

Rates quoted by tenderer will be FOR destination prices inclusive of taxes, levies, duties, packing, forwarding, freight, insurance, loading unloading, supply, installation, commissioning, and any/ all charges for successful Supply and Installation of the systems at any locations in the State of Gujarat and all other miscellaneous expenses of marketing, commissions etc, if any.

The rates quoted by the tenderer will be inclusive of Service Tax, Work Contract Tax, VAT or any other taxes applicable to such work. Any escalation in such taxes/ levies during the tenure of the contract/ order will not be paid by GEDA and tenderers are advised to take in to consideration any such escalations in the prevailing taxes/levies/duties.

In no circumstances, escalation in the prices will be entertained.

Your rates are to be submitted as per the enclosed Performa of schedule of rates (online only). Physical submission of price bid will disqualify the bidder.



Annexure 7 : Price Bid

Sr.No. Item Unit rate (in Rs.)

Installation & commissioning charges (in Rs.)

CMC charges for 5 years (in Rs.)

VAT/ CST (in Rs.)

Total Amount (in Rs.)

1 SOLAR PV ROOFTOP SYSTEM WITH BATTERY BANK

a 1 kW system

b 2 kW system

c 3 kW system

d 5 kW system

2 GRID CONNECT SOLAR POWER GENERATING SYSTEM

a 10 kW System

b 15 kW system

c 20 kW system

d 25 kW system

3 SOLAR PV HOME SYSTEMS (Model -2)

4 SOLAR PV STREET LIGHT SYSTEMS with CFL

5 SOLAR PV STREET LIGHT SYSTEMS with LED

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