waverley council solar in strata webinar

Waverley Council

Solar in Strata Webinar

Gareth Huxham B.E. MPhilEnergy Smart Strata

[email protected]

http://www.energysmartstrata.com.au/

Before considering solar

What are the best uses for your roof?

First, energy efficiency

First, energy efficiency

0

100

200

300

400

500

600

700

800

900

1000

01-Jul

01-Aug

01-Sep

01-Oct

01-Nov

01-Dec

01-Jan

01-Feb

01-Mar

01-Apr

01-May

01-Jun

Daily

ele

ctric

ity u

sage

(kW

h/da

y)

2015/16 2016/17 2017/18 2018/19

1st - Controls on car park ventilation

2nd – Lighting upgrade

3rd – 25kW solar array

Apartment building with 129 apartments. Achieved total energy savings of >50%.

Is your site ready for solar?

There are 3 key issues to understand before getting a quote:

1. Roof condition / roof membrane condition.2. Electrical infrastructure. How will a solar array connect to your site?3. Roof access.

Roof condition

The condition of your roof is an important issue impacting whether solar is viable. • Are there any leaks? Have there been any historical issues?• Check capital works program. When was the roof / membrane last maintained, when is the

roof due for an upgrade?• Solar suppliers (should) offer a 5 + warranty on workmanship. However are cautious about

installing solar on roofs they have existing issues and water leaks.

Anchored or floating?For flat concrete roofs (with a water proof membrane) there are 2 options to fix the solar array to the roof. Both have their pros and cons.

Anchored / membrane piercing Floating / ballasted• An anchored system is preferred for sites with

high wind loading. • Is the ‘standard’ installation.• Accepted industry practices and best practice

guidelines for installing solar systems on concrete roofs and waterproof membranes.

• Does not pierce water proof membrane.• Weight down by blocks.• Can be more expensive.

Electrical infrastructure

How will a solar connect to your electricity supply?• Run cables back to the main switchboard (typically basement or ground floor). • Connect to a distribution board (mechanical services or house lights and power) on the roof.

Can this board handle the load?Upgrades may be required to ensure electrical infrastructure can handle the load, is safe, and meets Australian Standards.

Does your switchboard look like this? Or this?....

Roof access

This site had easy access to roof through fire stairs. However one section was narrow and hand rails needed to be installed for safe work on the roof

This 20-storey had site had an un-safe roof that no solar suppliers were willing to work on

Many roofs are accessible by small hatches that can not fit a solar panel. Cranes are required to lift equipment to the roof

Types of solar installations

1. Common Areas Only 2. Common Areas &Apartments 3. Apartments only

• High common area electricity usage.

• Small usable roof area. • High number of apartments.

• High common area electricity usage.

• Large usable roof area.

• Low common area usage.• Large usable roof area. • Low number of apartments.

Tower Large low-rise apartment complex with a large footprint. Brick walk up

Solar for Common areas

Example building in Waverley

8 storeys

48 apartments

1 common area electricity meter

56,352 kWh pa

$11,125 Ex GST pa

53.5 tonnes CO2 pa

Already upgraded lights to LED

Solar for Common areasSteps to get solar

Assess roof capacity

Determine daytime electricity usage

Identify kW size

Cost-benefit analysis

Identify potential issues

Seek and compare quotes

Obtain final firm quote

Develop business case

EC Approval

Roof capacity

• A solar array requires ~8m2 per kW

• The site has a large area of 600m2. However only a fraction is usable and suitable to install solar panels.

• May accommodate a 30kW to 40kW solar array.

Usable area is restricted due to:

• Shading

• Ventilation equipment

• Access / anchor points

• Orientation

SunSpothttps://pv-map.apvi.org.au/

https://pv-map.apvi.org.au/

What kW size?

A solar array should be sized to meet your daytime electricity usage.

We need to understand how much electricity we use during the day.

Rough guide: A solar array kW size should be around 1.5 to 2 times your daytime kW demand for electricity.

The maximum output of a solar array is only around 70% to 80% of its rated size.

A 10kW solar array may only generate a maximum 7kW or 8kW during the middle of the day in summer, and much less in winter.

Daytime electricity usage

0

1

2

3

4

5

6

7

8

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time

Mon 20/05/19Tue 21/05/19Wed 22/05/19Thu 23/05/19Fri 24/05/19Sat 25/05/19Sun 26/05/19

Billing data Interval data• Only shows total electricity usage per month or

per quarter. • Should not be used to size a solar array.• Bills are used to determine the daytime cost of

electricity purchased from the grid.

• Interval data is your electricity usage data in 30-minute intervals.

• Shows when and how you use electricity. • Shows daytime electricity usage, this is required

to work what size solar array you need. Your solar supplier will need this data to quote your system.

• Interval data can be requested from you energy retailer, or downloaded from your online account / web portal.

HU[Y ) cZ )

7T]PN_ 7PMT_KK][b id hc <]fYWh <YV]h UhLRW%NZX%L`&BLdXPY_^cf WU`` (*( )+,+HT^L Z] ?L^_P]NL]OKGb`]bY7 LRW%NZX%L`&BLdXPY_^H\cbY7 (*'' -,. */-:]``Yf ;cXY7 )'//-/?LTWKYbX mcif W\YeiY cf acbYmcfXYf U`cb[ k]h\ h\]g gYWh]cbcZ h\Y V]`` hc74:> ELWP^ B_d >TXT_PO:BA 5Zc )))'# EdOYPd @EI )''(

:]``Yf ;cXY7 )'//-/JYZ+ FiaVYf7 .'+/ -/(- +)0+ '+/* 0-()

BZ^_ 5TWW[LdfKEU_Y U Hcgh :]``dUmr dUmaYbh+Gb`]bY7 [Z^_MTWW[Ld%NZX%L` H\cbY7 (*( /(-Ab dYfgcb Uh Ubm Hcgh GZZ]WY+o :]``dUm ;cXY7 *)'(

6PY_]P[Ld=`][]V`Y fYg]XYbh]U` WighcaYfg WUbj]g]h S`XLY^P]aTNP^%RZa%L`&NPY_]P[Ld9?D ;YbhfYdUm ;JF7 ,,,$'-/$*(0$=

BLdBLWLc dUm j]U HUmHU` j]g]h LRW%NZX%L`&BLdXPY_^

S9 -+12" ZYY %?KL ]bW`+& aUm Udd`m ]Z kY ]bWif U ZYY XiY hc mcif dUmaYbh aYh\cX) ]bWìX]b[ ]Z mci dUm Vm WfYX]h cf XYV]h WUfX+

EW\JT M]N $)(%0()&.1

8cS RObS *( >]V *()1FSTS`S\QS \c[PS` /(,0 .0). ,*1, (,0+ 1.)*

'0/-. 4-1535.31/61-15063./

---..4423/33,-//460=*.5501 K*//460 A*1.3/4

=UXWZ\JV\ RVOWZUJ\RWV&BLdXPY_ L^^T^_LYNP% L\YfY UfY U biaVYfcZ cdh]cbg UjU]̀ UV`Y hc Y`][]V`Y WighcaYfg)]bWìX]b[ FYk Kcih\ OU`Yg ?cjYfbaYbhYbYf[m WcbWYgg]cbg UbX fYVUhYg) =bYf[m9WWcibh HUmaYbh 9gg]ghUbWY %=9H9&) 9?DdUmaYbh dÙbg UbX h\Y ;YbhfYdUm gW\YaY+Lc Z]bX cih acfY) j]g]hLRW%NZX%L`&6ZYNP^^TZY^

@PPO LY TY_P][]P_P]3 ;U`` (*'' *'. )+,+

;PL]TYR TX[LT]PO !FFJ"% ;U`` (** -..UbX eichY .0-- 331 025+

AZ mci Xcb$h k]g\ hc fYWY]jY aUf_Yh]b[]bZcfaUh]cb UVcih 9?D dfcXiWhg UbXgYfj]WYg) j]g]h LRW%NZX%L`&7Z@Z_6ZY_LN_

?ZaTYR3 N]g]h LRW%NZX%L`&?ZaP hcUffUb[Y Ub Y`YWhf]W]hm WcbbYWh]cb Uh mcifbYk dfYa]gYg+

8YP]Rd PQQTNTPYNd% >cf ]bZcfaUh]cb UVcihYbYf[m YZZ]W]YbWm) j]g]h kkk+Ygg+bgk+[cj+Ui

IW]Z NTNL\ZRLR\a []XXTa MN\JRT[&

E`[[Wd LOO]P^^1 // H=FCANAD KLJ==L :GF<A FKO /-/3E`[[Wd [P]TZO1 /4 >YV /-.6 hc /0 EUm /-.6 %53 XUmg&@?<1 1.-/-.1/5/18YP]Rd BWLY1 KUjYfg

?P_P] DPLO VISYZ% _d[P41/33. 9WhiU` 0)535+03441/33. 9WhiU` .)15-+-6.41/33. 9WhiU` 0)062+3.41/33/ 9WhiU` .)040+24341/33/ 9WhiU` 2/0+62541/33/ 9WhiU` .)-31+3041/330 9WhiU` 252+45.41/330 9WhiU` //5+4-441/330 9WhiU` 101+.13

Qcif Y`YWhf]W]hm igU[Y ]g aYUgifYX Vm Ub ]bhYfjU` aYhYf) h\]g aYUbg h\Uh mci k]̀ ` bch gYY U ghUfh cf YbXfYUX]b[ cb mcif V]̀ `+ AbghYUX) h\Y hchU` Uacibh cZ mcif Y`YWhf]W]hm igU[Y ]g g\ckb+ Qcif bYlh aYhYffYUX ]g XiY VYhkYYb )) 4`R (0 LYO )/ 4`R (0+ H`YUgY YbgifY YUgm UWWYgg hc mcif aYhYf cb h\YgYXUmg+

<W_ _N!^N _WZSNM W]\ aW]Z KRTT&

BZN^RW][ KJTJVLN JVM XJaUNV\[& EW\JTHfYj]cig VUÙbWY !5)/42+365LWLYNP M]Z`RS_ QZ]bL]O $/#).,%-0

AN_ LQJZPN[ JVM LZNMR\[&G^LRP LYO ^`[[Wd NSL]RP^ GYT_^ B]TNP 4XZ`Y_

!.)/-0+13//0/+423_O\ !-+206HYU_!40.+4.1561+053_O\ !-+.162GZZ dYU_

!.)004+1325/4+4/1_O\ !-+//62K\ci`XYf!5/+2353 XUmg !-+63Kidd`m W\Uf[Y

2>A3; 483?76@ ( $'!'))#%-

6]POT_^!./+40WfJYjYfgU` * <YV]h%!./+40 ( !-+--?KL&

!.)-14+/2Wf0/" ?iUfUbhYYX <]gWcibh$%!$)-#-,4?"2>A3; 4?659A@

2>A3; =6C 483?76@ 3=5 4?659A@ 8 $&!&-)#&%2>A3; 012 ( $&'$#+-

FZ_LW O`P 2 $('#/'(%-0%]bWìXYg ?KL&

6kW

Daytime usage – common areas

0

1

2

3

4

5

6

7

8

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


0

2

4

6

8

10

12

14

16

18

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


0123456789

1011121314

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


0

1

2

3

4

5

6

7

8

9

10

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


The pattern of electricity usage of the common areas of 4 small to medium sized apartment buildings

Daytime usage – apartments

0.00.20.40.60.81.01.21.41.61.82.02.22.4

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Apar

tmen

t Apa

rtm

ent k

W

Time


0.0

0.2

0.4

0.6

0.8

1.0

1.2

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time

Fri 31/05/19Sat 1/06/19Sun 2/06/19Mon 3/06/19Tue 4/06/19Wed 5/06/19Thu 6/06/19

0.00.20.40.60.81.01.21.41.61.82.02.22.4

0:00

1:00

2:00

3:00

4:00

5:00

6:00

7:00

8:00

9:00

10:0

011

:00

12:0

013

:00

14:0

015

:00

16:0

017

:00

18:0

019

:00

20:0

021

:00

22:0

023

:00

Dem

and

kW

Time

Example Apartment 2


-

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0:00

1:00

2:00

3:00

4:00

5:00

6:00

7:00

8:00

9:00

10:0

011

:00

12:0

013

:00

14:0

015

:00

16:0

017

:00

18:0

019

:00

20:0

021

:00

22:0

023

:00

Dem

and

(kW

)

Mon 06-Nov-17

Tue 07-Nov-17

Wed 08-Nov-17

Thu 09-Nov-17

Fri 10-Nov-17

Sat 11-Nov-17

Sun 12-Nov-17

Average apartment electricity usage – data logging on entire building

Individual apartment electricity usage

Export ratio

Export ratio: ratio of the electricity generated by the solar array that is exported back to the grid. An export ratio of ~10% is considered ok.Any higher, and your solar array may be over-sized.

0123456789

10

1/1/

19 0

:00

1/1/

19 1

2:00

2/1/

19 0

:00

2/1/

19 1

2:00

3/1/

19 0

:00

3/1/

19 1

2:00

4/1/

19 0

:00

4/1/

19 1

2:00

5/1/

19 0

:00

5/1/

19 1

2:00

6/1/

19 0

:00

6/1/

19 1

2:00

7/1/

19 0

:00

7/1/

19 1

2:00

kW

Site electricity usage Output of a 12.5kW solar array

0123456789

10

1/7/

18 0

:00

1/7/

18 1

2:00

2/7/

18 0

:00

2/7/

18 1

2:00

3/7/

18 0

:00

3/7/

18 1

2:00

4/7/

18 0

:00

4/7/

18 1

2:00

5/7/

18 0

:00

5/7/

18 1

2:00

6/7/

18 0

:00

6/7/

18 1

2:00

7/7/

18 0

:00

7/7/

18 1

2:00

kW

Site electricity usage Output of a 12.5kW solar array

Comparison of site energy usage and output of a 12.5kW solar array in summer

Comparison of site energy usage and output of a 12.5kW solar array in winter

Some electricity will be exported to the grid during summer

Feed in tariff

Apartment building 24.6kW solar array.18% export ratio.

6,490 kWh pa exported to the grid

A higher feed in tariff does NOT always mean lower costs

IPART Benchmark 2019/20: 8.5 to 10.4 c/kWh

Current rates offered by retailers: 0 to 21c/kWh

Peak Shoulder Off Peak Daily Supply charge

Solar feed in tariff

Total costs

c/kWh c/kWh c/kWh c/day c/kWh $ pa

AGL Residential Solar Savers

54.36 23.14 15.08 103.4 21 $11,061

AGL Residential Smart Saver 18%

discount44.58 18.97 12.37 84.79 10.2 $9,525

Plan

Solar cost benefits

Summary of cost benefitsCost Variable – installer, products, site-specific issues

An installed cost of $1.4k to $1.8k per kW is reasonable.

Savings 1 kW of solar panels generates around 1,350 kWh pa

However not of all this may be a ‘saving’. A % may be exported back to the grid

Can not be calculated without interval data

Payback Typically 4 to 8 years

Simplified cost benefit analysis

Item Notes ValueDaytime demand

for electricity

Use interval data to determine the typical / average

daytime demand for electricity

6kW

Solar roof capacity Use APVI sunspot to approximately work out what

size your roof can accommodate

30kW

Solar array size ~1.5 to 2 times the daytime demand may be

suitable. Above this the export ratio becomes too

high. Solar array should be > 10kW to be viable.

10kW

Installed cost An installed cost of $1,400 to 1,800 is reasonable $16,000 Ex GST

Daytime rate Use the average of peak, shoulder and off peak rates

(using their time of use periods). Apply any usage

discounts. Is your cost Ex GST?

26 c/kWh Ex GST

Electricity savings A solar array may generate ~1,350 kW pa / kW 13,500 kWh pa

Cost savings Electricity savings x daytime rate $3,510 Ex GST pa

Payback Capital cost / cost savings 4.6 years

Get solar quotes

Recommended to obtain quotes for 3 suppliers:• Experience working in strata. • Reputation.• Installer CEC accreditation (required to be eligible for STC Rebate).

Provide each solar supplier with:ü Recent electricity bills.ü Interval data (if possible) or a LoA for them to access this data.ü Note any site specific issues: roof condition, electricity infrastructure, roof access.ü Suggest solar array kW size (they will recommend a different size but good to have a starting

point).ü Site contact details to arrange a site inspection.ü Project timeframe e.g. need quotes before AGM.

www.cleanenergycouncil.org.au/consumers/buying-solar/find-an-installer

http://www.cleanenergycouncil.org.au/consumers/buying-solar/find-an-installer

Compare quotes

• Each solar supplier provides a quote in a vastly different format, presents different information, and may use different terminology.

• It can be difficult to compare.• Need to extract key information to allow for a like-for-like comparison.• What is not included in their quote, can often be more important than what is included in

their quote.

Solar Quote checklist• Size of system kW• Cost

– Not the most important factor.– Is it a firm cost? Has the installer conducted a site inspection?

• Product quality.• Warranty:

– Panel product warranty.– Inverter warranty.– Workmanship.

• Mounting type:– Anchored or ballasted. – Flat or tilt mounted.

• Installer:– Experience working in strata. – Reputation.– Installer CEC accreditation (required to be eligible for STC Rebate).

• What is included?– Meter upgrade.– Ausgrid approvals.– Access to roof, lifting equipment to roof, and working safely on the roof.– Switchboard / electrical upgrades.– Connecting the solar to the site e.g. cable run to meter.

• Monitoring. – Should be included in all installations.– Is there an annual subscription fee.

• Maintenance.

Warranties

Warranty Description Range

Solar panel product warrantyFor defects in materials and

workmanship.From manufacturer.

10 to 25 years

Solar panel performance warranty

Panel output over a specific period

From manufacturer.

Progressively reduced performance guarantee of 25 years. Can be around 80% to

82% over 25 years

Inverter warrantyFor defects in materials and

workmanship.From manufacturer.

5 to 12 years

Workmanship

From installer.Standard 5yr warranty for CEC

approved installer on the operation and performance of the

whole solar system including workmanship and products.

5 to 10 years

Government incentives

Solar rebate:• Installing a solar array < 100kW generates a STC rebate.• Small-scale technology certificate - Federal Government Small-scale Renewable Energy

Scheme.• About $500 per kW.• This will already be included in your quote from your solar supplier.

Comparing panels & invertersOnline resources to compare and rank products E.g.:https://www.solarquotes.com.au

Panels

Inverters

https://www.solarquotes.com.au/

Comparing panels

Product name Canadian Solar KuPower Poly Hyundai RG Series (HiS) JA Solar JAMS10 Jinko Solar Eagle PERC 60M 280-300 LG NeON 2 QCells Qcells Q.MAXX Risen RSM60P

Manufacturer Logo

Panel image

Model number(s)

CS3K-295PCS3K-300PCS3K-305PCS3K-310P

HiS-S300RG

JAM60S10-320/PRJAM60S10-325/PRJAM60S10-330/PRJAM60S10-335/PRJAM60S10-340/PR

JKM280PP-60JKM285PP-60JKM290PP-60JKM295PP-60JKM300PP-60

LG340N1C-V5LG345N1C-V5LG350N1C-V5LG355N1C-V5

Q.MAXX 320Q.MAXX 325Q.MAXX 330Q.MAXX 335

RSM60-6-270PRSM60-6-275PRSM60-6-280PRSM60-6-285PRSM60-6-290P

Wattage

295W300W305W310W

300 W

320W325W330W335W340W

280W285W290W295W300W

340W345W350W355W

320W325W330W335W

270W275W280W285W290W

Panel efficiency

17.75%18.05%18.36%18.66%

18.44%

19.0%19.3%19.6%19.9%20.2%

17.11%17.41%17.72%18.02%18.33%

19.8%20.1%20.4%20.7%

19.0%19.3%19.6%19.9%

16.5%16.8%17.1%17.4%17.7%

Approx Cost per Watt – AUD Retail incl GST $0.66 $0.75 $0.75 $0.60 $1.19 $0.79 $0.67

Approx cost per panel – AUD Retail incl GST $198 $226 $255 $180 $415 $261 $187

Panel technology Polycrystalline Monocrystalline Monocrystalline Monocrystalline Monocrystalline Monocrystalline Polycrystalline

Country of manufacture China South Korea China China South Korea South Korea/China/Malaysia China

Company origin China South Korea China China South Korea Germany (now owned by Korean Hanwha) China

Annual turnover of company (USD) $2.85 billion $39 billion $2.41 billion $3.2 billion $47.91 billion $2.42 billion $808 million

Panel weight 18.5 kg 18.2 kg 18.7 kg 19kg 17.1 kg 18.7 kg 18 kg

Number of busbars 5 5 5 4 12 12 5

Operating temperature -40°C – 85°C -40°C – 85°C -40°C – 85°C -40°C – 85°C -40°C – 90°C -40°C – 85°C -40°C – 85°C

Temperature coefficient (Pmax) -0.37%/°C -0.41%/°C -0.35%/°C -0.39%/°C -0.36%/°C -0.36%/°C -0.39%/°C

Salt mist corrosion level IEC 61701 certified, level 1 IEC 61701 level 1 TBD TUV NORD cerified IEC 61701 certified, level 6 IEC 61701 certified, level 6 IEC 61701 level 1 claimed

Front load resistance 6000 Pa 5400 Pa 5400 Pa 5400 Pa 5400 Pa 5400 Pa 5400 Pa

Rear load/wind resistance 4000 Pa 2400 Pa 2400 Pa 2400 Pa 4000 Pa 4000 Pa 2400 Pa

Product warranty length 12 years 25 years 12 years 10 years 25 years 12 years 15 yearsWarranted annual performance degradation

year 2-250.60% per year 0.70% loss each year 0.6% per year 0.70% loss each year 0.33% loss per year 0.54% per year 0.7% per year

Power output warranted at year 25 83.10% 80.2% (after 25 years) 83.10% 80.20% 90.08% 85.00% 80.70%Does warranty include labour costs for removal

and reinstallation of panels?No No No Yes Yes Yes No

https://www.solarquotes.com.au/panels/comparison/compare-solar-panels/

https://www.solarquotes.com.au/panels/comparison/compare-solar-panels/

Inverters Traditional string inverter Solar edge inverter Micro inverter

1 inverter on the wall. All panels are connected in series (string) to the inverter.

One inverter on the wall, each panel has a solar optimizer.

Each panel has a small micro-inverter on its back.

One poor performing panel (e.g. shading) can affect performance of the entire array

One under-performing panel will not affect the panels. Advanced monitoring of each panel.

One under-performing panel will not affect the panels. Advanced monitoring of each panel.

Simpler and less expensive More advanced and more expensive

More advanced and more expensive. Best for sites with heavy shading.

Batteries

Not currently cost-effective or recommended for apartment buildings. May not pay for itself over its life.

Better to size a solar a solar array to meet daytime demand for electricity. And receive a feed-in tariff for any electricity exported to the grid.

Batteries are suited to off-grid applications.

Tesla Powerwall 13.5 kWh

Enphase 1.2 kWh

Funding & Business case

Funding:• Purchase outright through capital works fund• Or other financing options:

• Leasing• Power Purchasing Agreement

Business case:• Payback• Have conducted a cost-benefit analysis• Once system has paid for itself it delivers free clean energy• Long system life• Low maintenance• Good quality products with a long warranty• Reputable experienced installer• Have addressed issues• Growing number of buildings installing solar

Alternatives to solar

• GreenPower is generated by accredited renewable energy generators and purchased by your energy company on your behalf.

• GreenPower is renewable energy sourced from the sun, the wind, water or waste.

• Purchasing GreenPower can improve the NABERS Energy rating for your building.

• GreenPower provides investment in new renewable energy generation.

GHG Savings Capital Cost

tCO2-e pa $ Ex GST

Purchase GreenPower to supply a portion of electricity usage

10% 5.4 $310

25% 13.4 $775

50% 26.8 $1,550

75% 40.2 $2,325

100% 53.5 $3,099

Energy Saving Opportunity

For our example site, they could supply 25% of their common area electricity usage by:• Installing a 12.5kW solar system at a cost

of $18,000• Or they could purchase 25% GreenPower

at a cost of $775 pa.

Case study

Apartment building in Zetland with 129 apartments. • Total energy savings: >50%:

• Ventilation controls• Lighting upgrade• 25kW solar array

• Solar savings: 17%.• Total GHG savings: 35 tCO2 pa

0

5

10

15

20

25

30

35

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


0

5

10

15

20

25

30

35

0:30

1:30

2:30

3:30

4:30

5:30

6:30

7:30

8:30

9:30

10:3

011

:30

12:3

013

:30

14:3

015

:30

16:3

017

:30

18:3

019

:30

20:3

021

:30

22:3

023

:30

Dem

and

kW

Time


Common area electricity usage – pre solar

Common area electricity usage – post solar

Approvals at a General Meeting• Annual General Meeting (AGM)• Extraordinary General Meeting

(EGM)

Common Property

Motion

Special Resolution

Sustainability Infrastructure

Resolution

PersonalUse

Common Property

Rights by-law

Special Resolution

Sustainability Infrastructure

Resolution

Today

Late July (expected)

Voting Thresholds

Special Resolution– not more than 25% of the value of votes cast are

against the resolution– not the same as 75% or more in favour, because

some may abstain from voting

Sustainability Infrastructure Resolution– less than 50% of the value of votes cast are against

the resolution

* the value of a vote is the unit entitlement of the lot

All ownersPresent at the

meeting, in

person or by proxy, and

eligible to vote

The percentages apply to this subset of owners – not ALL owners

Sustainability Infrastructure (as presented to Parliament)

reduce the consumption of energy or water or to increase the efficiency of its consumption

reduce or prevent pollution

reduce the amount of waste sent to landfill

increase the recovery or recycling of materials

reduce greenhouse gas emissions

facilitate the use of sustainable forms of transport

Changes to common property to:

Common Property Rights By-laws

} Give the owner(s) of the lot(s) specified in the by-laws– personal use of common property for renovations; and/or – sole use and enjoyment of the whole or any specified part of common

property} Need the written consent of the owner(s) concerned } Must specify who is responsible for the maintenance and upkeep of

the relevant part of common property } Can specify whether any payments are to be made for the

maintenance and upkeep

} Can only be passed at a general meeting of the owners corporation} Extra costs for owners

– Calling EGM if none already scheduled– Legal fees to draft by-law

A cost-effective Solar By-law Kit will be available VERY soon!

waverley council solar in strata webinar

Documents