To determine the amount of useable AC (Alternating Current) electricity your system will generate, use the following formula:
For Homeowners - if you were to install a 5 kW (5,000 watts) PV System:
- 5,000 W x 5 hrs/day* = 25 kWh (kilowatt hours)/day DC
- 25 kWh/day - 5 kWh DC** = 20 kWh useable AC/day
- (or 7,300 kWh/year)
For Business Owners - if you were to install a 25 kW (25,000 watts) PV System:
- 25,000 W x 5 hrs/day* = 125 kWh (kilowatt hours)/day DC
- 125 kWh/day - 25 kWh DC** = 100 kWh useable AC/day
- (or 36,500 kWh/year)
*annual approximate hours of solar irradiation per day for a specific part of the country. To see a sample Solar Radiation map, click here - Solar Map.
**20% derate factor for converting solar generated DC electricity into usable AC electricity.