- **Winter (Dec-Feb)**: ~2-3 kWh/m²/day - **Spring/Fall (Mar-May, Sep-Nov)**: ~3-4 kWh/m²/day - **Summer (Jun-Aug)**: ~5-6 kWh/m²/day - winter w/ heavy clouds snowing ~ .5 kWh/m²/day - 1 kilowatt-hour (kWh) = 3,412 BTU - Light clouds: Reduce output by ~30%. - Heavy clouds: Reduce output by ~70%. | Month | Max W/m² (sun only) | Hours of Sunlight | Min (kWh/m²/day) | Average (kWh/m²/day) | Perfect (kWh/m²/day) | | --------- | ------------------- | ----------------- | ---------------- | -------------------- | -------------------- | | January | 550 | 9.5 | 0.3 | 1.4 | 5.2 | | February | 750 | 10.5 | 0.4 | 2.0 | 7.9 | | March | 950 | 12.0 | 0.5 | 3.2 | 11.4 | | April | 1100 | 13.5 | 0.6 | 4.5 | 14.9 | | May | 1200 | 14.5 | 0.7 | 5.3 | 17.4 | | June | 1250 | 15.0 | 0.8 | 5.8 | 18.8 | | July | 1250 | 15.0 | 0.8 | 6.0 | 18.8 | | August | 1200 | 14.0 | 0.7 | 5.6 | 17.4 | | September | 1100 | 12.5 | 0.6 | 4.8 | 14.3 | | October | 950 | 11.0 | 0.5 | 3.5 | 11.0 | | November | 750 | 9.5 | 0.4 | 2.0 | 7.1 | | December | 550 | 9.0 | 0.3 | 1.2 | 4.9 | #### Kyle - (26) 310 Watt panels - ~50 m2 - 18 kwh max