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TrekHaus West: Net Energy Producer in 2012

posted Dec 26, 2012, 1:44 PM by Ella Wong   [ updated Dec 26, 2012, 2:04 PM ]
Yes, Ella and Randy just celebrated living a full year at TrekHaus West!  Living net zero is no longer a fantasy.  We generated more energy than we used in 2012!  Here are the numbers...

TrekHaus West Energy Use/Generation Summary

Year 1

(12/26/11 to 12/26/12)

Total Energy Use 1st Year:  3322 kWh

Average Energy Use Per Day:  9.1 kWh/day

Total Energy Generation 1st Year:  3748 kWh

(PV turned on 5/8/12, so just 7.5 months of solar power)

Expected annual energy generation:  about 4600 kWh from 4.70 kW system

Estimated annual energy production/excess:  1260 kWh 

(enough to power EV about 3800 miles)

Additional solar capacity exists if needed in future.

(room to add 5 more rooftop PV panels)

Number of occupants:  2

Thermostat:  68° F day, 66° F overnight