How To Calculate Solar Panel Battery & Inverter
Incidentally, the peak-sun-hours for Chicago is about the US average (4), so I''ll use that in my calculations.. Solar panel sizing calculator. Daily energy required = 30kWh. Solar power wattage required = 30kWh/4 peak-sun-hours = 7.7kW of solar power rating Let''s say we uses 300 watt solar panels, then: