From Appropedia

[edit] How to size a Solar PV System

Average Annual Energy Usage kWh/day
* 1000 watts/kWh
- other energy generation sources
/ Usable Hours of Sunlight Per Day
/ Watts per PV Panel
* 1+days of backup power
/ Battery Effeciency
/ Inverter Effeciency

e.g.

10 kWh/day usage
* 1000 watts/kWh
- 0 (no other generation)
/ 5 Usable Hours of Sunlight Per Day
/ 200 watts per panel
* 3 (Two days of extra juice)
/ 75% Battery Effeciency
/ 94% Inverter Effeciency
= 43 panels
* $800 per panel
= $34,400
+ battery costs

Is this right ??? -Thank you for asking. No, it is not right. More later. --189.156.20.58 00:58, 3 August 2007 (PDT)

[edit] See Also

• Inverters
• Batteries

[edit] External Links