Solar Panel Sizing Calculator

Calculate the number of solar panels needed for your energy requirements.

Daily Energy Consumption (kWh) Check your electricity bill or use our Load Calculator

State/Location

Panel Wattage

System Losses (%) Includes inverter, wiring, soiling, and shading losses


                        System Size (kW) = Daily kWh / Sun Hours / (1 - Losses)

                        Panels = System Size (W) / Panel Wattage

Peak sun hours vary by location and season. System losses include inverter efficiency, wiring, soiling, and shading.

Results