1Solar Panel Parameters
Wp
%
Module degradation + tilt loss + soiling + wiring losses, typically 70–85%
h/day
= daily total irradiation (kWh/m²) ÷ 1000 W/m²
2Battery and Charging Target
Ah
%
Charge controller + battery charging losses
%
%
3Calculation Results
Peak Sun Hours Reference (h/day)
| Region | Annual Average | Winter Minimum |
|---|---|---|
| Northwest (Xinjiang/Qinghai) | 5~6 | 3~4 |
| North China (Beijing, etc.) | 4~5 | 2.5~3 |
| East/South China | 3.5~4.5 | 2~3 |
| Southwest (Sichuan/Guizhou) | 3~3.5 | 1.5~2 |