PV Balance of Systems – India Challenges and Global

Benchmarking

An Indian MNC in Power back-up industry

Focus on 3 verticals – Inverters/UPS, Batteries & Renewables

Has 10,000 strong dealers / distributors across country.

Manufacturing units – 6; Employees - 2000

23 Offices in India and one at Dubai.

Investment from Reliance India Power Fund (A JV between Reliance and Tamasek Holdings).

R&D recognized by CSIR, Govt of India.

65 Technology and Design patents in India and US.

Export to More than 50 countries.

Su-Kam Power Systems

RangeSweet Spot

Applications TAM

0 - 250W 5-10W

Rural Home Lighting, Street Lighting, Lanterns,Emergency Lights, Lighting Retrofits etc

20 million+ households, Remote Village Electrification program of MNRE covering about 10,000 villages

India’s Solar Market Classification

250W-5KW (off-grid)

1KWResidential, Small Commercial, SPV Pumps

Entire Power back-up industry market, 4 million inverters per year

5 - 50KW (roof-top, off-grid)

3-15KW

Big Commercial, Telecom Towers, Rural ATMs, Govt. Buildings

150,000+ rural telecom towers, 50,000+ rural ATMs

3 - 100KW (roof-top, grid connected)

3-25KWBig Commercial, Govt. Buildings

70% of commercial buildings in 2030 are to be built from now to 2030.

>100KW, IPP, Grid-connected

100KW-1MWIndependent Power Plants

National Solar Mission – 1000MW by 2013, 20,000MW by 2022

5” Ceiling Retrofits

Quality of charge controllers are mostly not good Mostly non-PWM. No multi-step charging No Temp. compensation of batteries No State of Charge information

Solar Applications – DC / Low Power Apps

SolarChargerController

Essentially a Cost Vs Performance dilemma!

EnergySource

PV Array

Loads

AC Distribution

Panel for Load

Utilization

Solar PVInverter

Battery

Mains

Solar Charger

Controller

Energy Conversion

Standalone Solar Power Systems for Households

Electronics Life – 10+ yrsEfficiency – 96%+Controlled DoD, Top-up Charging, Equalization

Battery Life – 1200-1500 cycles @ 60-70% DoD

All of above with wider temperature / moisture / dust / handling tolerances

High-efficiency charge controllersLow-cost MPPT

AMF Panel Solar Charge

Controller

Solar panel

Battery bank

Inverter

SMPS

Change Over switch

ACDBDCDB

DG EB Grid

DC Load AC Load

Controller & GSM/GPRS

Modem

Control & Measurement Bus

Off-grid Solar PV Systems (Telecom, ATM …)

Battery Management & Control System.High Efficiency

High Reliability, N+1 RedundancyModularity

Remote Monitoring, NOCC CenterAlerts and Triggers

Roof-top Grid Connected Systems

Islanding – Creating Virtual GridDG Set compatibility

Grid StabilityGrid Availability

Net MeteringFeed-in Tariff

Su-Kam Solar Energy Products

1. Solar Home Lighting System.2. Stand-alone Solar Power Systems for

households.3. Grid-Connected Solar Power Systems for

household and small establishments4. Solar Powered Street Lighting Systems.5. Solar Powered Water Heaters for

households6. Solar Powered Tube-wells.7. Solar Powering and Management

Systems for Cellular Mobile Towers.8. Solar Powering and Management

Systems for Rural ATM machines.

Su-Kam’s Completed Project – Rural Solar Home Lighting Systems

• 1.2 – 3.6W DC Consumption• 100 - 300 Lumens

Su-Kam’s Ongoing Projects – Solar LED Lighting Solutions

Essential Features :•More than 3 days of autonomy •Automatic Dusk to Dawn Controller (DTDC) / Timer operation •Highly efficient charge controller •Temperature compensated set points •Weather proof luminaries •All necessary protection •UV stabilized bowl and canopy •Anodized aluminum reflectors

• 7.2 – 14.4W DC Consumption

• 600-1200 Lumens

PV Module

SCC

Solar Inverter

LOAD

Battery

LOAD

Mains

Available in 250VA,400VA, 650VA, 850VA,

1500VA packages!

Su-Kam’s Completed Projects – Standalone Solar Power Systems for

Households

Su-Kam’s Completed Projects – Standalone Solar Power Systems for

Households

Su-Kam’s Ongoing Projects –

MCD Aap Ke Dwaar

Solar powering of 2000 Information Kiosks for Municipal Corporation of Delhi, New Delhi

Su-Kam Solar PCU Range: 1 to 10 KVA

Power Back-upfor

Telecom

Major Clients:

6 KW Hybrid Solar Powering of Telecom Site in Uganda

Su-Kam’s Completed Projects ...

Su-Kam’s Ongoing Projects – Solar Powering of

ATM Machines

State Bank of Patiala ATM, Sangrur, Punjab – Turnkey Solution for Hybrid Solar-Grid

powering.

Su-Kam’s Completed Projects ...

40 KW Solar Inverter at Brahma Kumaris Ashram, Manesar

Three Phase Solar Inverter Range with Grid Charging: 10 to 100 KW

Su-Kam’s Ongoing Projects – Grid-Connected Solar Power

Systems for household and small establishments

Grid-tied Solar Inverter Available from 3 KW – 10 KW

Grid-tied Solar Inverter

Monitoring SoftwareSolar Inverter 1P (till 10KW)

Solar Inverter 3P (till 100KW)

SMF Battery (7.2 – 200AH)

Solar Panels Solar HF Inverters Solar Charge Controllers

Solar Power Conditioning Units (PCU)

Su-Kam Solar Products

Su-Kam’s Valued Clients

Testing Standards / Accreditation Agencies

IEC 61727

PV Systems - Characteristics of the Utility Interface. <10KW PV systems connected to low voltage grid.

IEC 62109

Safety of Static Inverters. Comparable to UL 1741. Mechanical and Electrical safety aspects

IEC 62116

Testing procedure of Islanding Prevention Methods for Utility-Interactive PV Inverters

IEC 60364

Electrical Installations of Buildings: Requirements for Solar PV power supply systems

G83/1 Engineering Recommendation For Small Scale Embedded GeneratorMain focus on

Power Quality Parameters Voltage & Frequency Range Flicker, DC injection Harmonics and PFLoss of Mains test

Under / Over Voltage: 207V / 264VUnder / Over Frequency: 47Hz / 50.5Hz

IEC PV BoS Standards

NABL, Solar Energy Center, Fraunhofer Institute, Intertek

Customize the PV Inverter testing standards for India

Testing Accreditation

Focus on new technologies• Multi-string inverters - a single inverter to

convert power input from several module strings, reducing inverter costs for PV systems.

• Maximum Power Point Tracker (MPPT) for each string, ensuring maximum energy yield.

• Modularity and N+1 redundancy• Improve MTBF to give better reliability• Improved Higher KVA product range.• Minor KVA adjustments in the lower end

inverters. • HF Solar Inverters• Micro inverters for maximizing the

efficiency.• Grid Interactive solar Inverters to be a part

of the solar Power generation play – will be the dominant business in the coming years

Solar Inverter – R&D, Future NeedsR&D: “Center of Excellence in PV” at IIT-Mumbai - Network of CoEs

MNRE’s PV Research Council – Industry Experts, Scientists, Researchers, Reps …

CIIE at IIM, Ahmadabad Innumerable Solar start-ups

1st Generation – Early adoption, Technology proofing. 2nd Generation – Repeatability, Efficiency. 3rd Generation – Scaling-up.

Future Needs: Need to create critical mass of researchers Fill the link between lab to plant Pre-competitive collaborative research thru’ open domain or

consortium model Cost Effective Power Electronics – MPPTs, Micro Inverters. Special Focus on Batteries and storage technologies Innovative solutions – esp. Business models …

Summing Up …OPPORTUNITY:• India’s National Solar Mission: To set up a capacity

of solar power generation of 20000 MW by 2022• Seen as the long term solution to India’s power

deficit• Total Capital Outlay at Today’s Prices for adding

20,000MW Capacity is INR 4 lakh crores (USD 90 Billion)!

• Share of Electronics (Balance of System) alone will be Rs 80000 Crores (US $20 Billion)!

CHALLENGES:• Need unique solution for India for grid-tie inverters. Grid is unstable

and isn’t available most of the time. Doesn’t comply to any of the known specifications.

• Need Solar Charge Controllers that can take advantage of the existing Inverters / HUPS that are already installed for off-grid applications.

• Need low-cost, high-efficiency charge controllers (MPPT?) that can work with wide-variety of batteries.

• Inverters (Solar / Otherwise) are still designed with chips designed for motor control application. Need Inverter specific solution (Input PFC, Battery monitoring/algorithms, Charge current/mains sense, Power device drivers etc)

Thanks