Residential PV Solar system size Calculation
Manual System Sizing Tool Using the amount monthly kWhs from your utility bill, and the amount of sun hours your location receives, you can find the size of your system, in DC watts, needed to cover 100% of your usage. Sun Hours Monthly Usage < 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 50kWh 0.7kw 0.6kw 0.5kw 0.5kw 0.4kw 0.4kw 0.3kw 0. kw 100kWh 1.4kw 1.2kw 1.0kw 0.9kw 0.8kw 0.8kw 0.7kw 0.6kw 150kWh 2.0kw 1.7kw 1.5kw 1.4kw 1.2kw 1.2kw 1.0kw 0.9kw 200kWh 2.7kw 2.3 kw 2.0kw 1.8kw 1.6kw 1.6kw 1.4kw 1.2kw 250kWh 3.4kw 2.9kw 2.5kw 2.3kw 2.0kw 2.0kw