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Shading Loss
Annual generation loss from partial shading.
PerformanceCore inputs only — quick sizing with engineering defaults.
Inputs (SI units)
Results
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Engineering Formula
- Loss% = min(100, shade% × amp)
- E_loss = Loss% × E_unshaded / 100
PV bypass-diode topology amplifies partial shading: 10% shade often costs 20–30% of a string's output. The amplification factor captures this non-linearity.
Step-by-step Calculation
- 1.Loss
shade × amp20 % - 2.Energy
Loss × E3,000 kWh
Design Assumptions
- • Series-connected cells with 3 bypass diodes per module.
- • Uniform amp factor over the year.
Engineering Tips
- ◆Use micro-inverters / MLPE if unavoidable shading > 15%.
- ◆Move shading elements (antennas, ACs) if possible.
Warnings
- ▲Persistent hot-spots from shading can crack cells long-term.
Standards & References
IEC 61853-2NREL Shading Report
Related Solar Calculators
Annual Energy Yield
Daily / monthly / annual yield from CUF and PR.
Azimuth Deviation Loss
Annual energy loss vs deviation from true south (N-hem).
Temperature Loss
Power derating from cell temperature above STC 25 °C.
Irradiance → Energy
PV energy produced from measured irradiance.
Peak Sun Hours
Convert daily insolation to Peak Sun Hours.
Monthly Yield Split
Distribute annual generation across months (India typical).