Solar electricity calculator
Power × peak sun hours × performance ratio. Change the region to swap the default sun hours.
기본값은 내 지역입니다. 다른 척도와 비교하려면 전환하세요.
결과
0 kWh
Daily yield
- Yearly yield0 kWh
- Gross annual value0
- PSH used4.5
Site matters more than the average
NREL PVWatts and similar tools use weather files, tilt, and azimuth. This page is the envelope math for first sizing.
공식
Daily kWh = kW × peak sun hours × PRYear ≈ daily × 365PR defaults to 0.75 (dust, heat, inverter)
계산 방법
- Enter DC system size in kW.
- Peak sun hours default to the selected region — override if you have a local figure.
- Apply a performance ratio (0.75 is a conservative default).
자주 묻는 질문
What is a peak sun hour?
One hour of 1,000 W/m² irradiance. Five PSH means the day’s energy equals five hours at peak sun, not five hours of clock time.