Carbon Action Project Launch Booklet - Page 9

Capacity (kilowatts) Installed date Cost of the installation Feed-in tariff tariff (cents/kWh) Annual generation (kWh) Annual value exported Annual electricity offset Annual saving (estimated) Annual consumption Pay back period (years) Greenhouse savings (tonnes CO 2 ) 210 Antill St 2kW 2010 $8,055 gross 50.5 Parish Centre 5kW 2011 $23,995 gross 45.7 Ross Walker Site to- Lodge tal 13.2kW 20.2kW 2-Dec-19 $10,990 nett 8 2,700 $1,364 6,938 $3,171 17,470 $840 $1,460 $1,364 $0 - $600 5.9 $3,171 $1,600 7.6 $2,300 $4,520 4.8 $6,834 $6,120 2.2 5.5 14.3 22 The figure below shows the operation of the new solar system in Ross Walker Lodge generating 63.8 kilowatt hours of electrical energy on a partly cloudy day in February 2020. The wiggly line shows the electricity use in the house over a 24 hour period. The grey shaded area shows that between breakfast and dinner time the house ran entirely on solar power (saving electricity at around 20 cents per kilowatt hour), while ex- porting the surplus green area to ActewAGL at 8 cents per kWh. The spikey shape of the green area results from clouds passing over. The in- sert is the instantaneous situation at 11:30 that morning. Carbon Action Project 6 1 March 2020