A 10kW solar system produces between 30-55 kWh daily and 11,000-20,000 kWh annually, depending on your location, weather conditions, and system efficiency. This production range can cover the energy needs of most average American homes, which use approximately 10,791 kWh per. A 10kW solar system can produce around 40 kWh per day. 98 PSH) with PVWatts v8 derate: 41. 3 kWh/day, 1,257 kWh/month, 15,080 kWh/year. That is enough to fully offset a typical U.