Want some examples?
Some examples of household usage |
Solar Electric Info |
| |||
Square Footage |
Electrical usage (kwh) |
average kwh/ square foot |
# of watts of PV to cover 100% of electricity usage |
Watts PV/ Square Foot |
Main heating source |
1000 |
377 |
.377 |
2200 |
2.2 |
Oil |
1270 |
250 |
.197 |
1500 |
1.1 |
Gas |
1800 |
250 |
.139 |
1500 |
1.1 |
Propane |
2000 |
295 |
.148 |
1700 |
0.9 |
Oil |
2650 |
1175 |
.44 |
6900 |
2.9 |
Oil |
2800 |
1010 |
.36 |
5900 |
2.1 |
Oil/wood |
3000 |
1555 |
.518 |
9100 |
3 |
Gas/wood |
Here is a chart showing the above information. Although these examples represent only a small sample of possible combinations of electricity usage for households, hopefully we have demonstrated that the amount of PV it will take to power your needs depends upon your electricity use and NOT the square footage of your home.