How do you calculate the solar system capacity?
Energy production from a solar electric (PV) system is a function of several factors, including the following. Our assumptions are shown:
| Factor | Assumption |
|---|---|
| Solar resources | Assumed solar availability: As per PV Watts |
| Soiling or contamination of the PV panels | Clean, washed frequently: 98% design sunlight transmission |
| Temperature | 25C, calm wind |
| System configuration (battery or non-battery) | Non-battery |
| Orientation to the sun | tilted at your latitude, South facing |
| Shading | None |
| PV Energy delivered as % of manufacturer`s rating | 95% |
| Wiring & power point tracking losses | 9% (91% delivered) |
| Inverter Efficiency | 90% |
| Total Energy Delivered | 95% x 91% x 90% = 78% |