Size a standalone photovoltaic system based on daily load, sun hours, battery autonomy, and system losses.
Input Parameters
Results
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PV Array Size
W
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Battery Bank
Wh
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Panels (400W)
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Daily Generation
Wh
Note: Standalone systems must be oversized 20-30% for seasonal variation. Battery autonomy of 3 days is standard for residential off-grid.
Reference
PV Size = Daily Load / (Sun Hours x System Eff)
Battery Wh = (Daily Load x Autonomy) / (DoD x Eff)
Num Panels = ceil(PV Size / Panel Wattage)
Daily Gen = Panels x Wattage x Sun Hours x Eff