For detailed assessment, it requires an understanding of how these factors interact over time.. On average, a 10-watt solar panel under optimal sunlight can generate approximately 40 to 60 watts-hours (Wh) per day. It allows homeowners, small building owners, installers and manufacturers to easily develop estimates of the performance of potential PV installations. Operated by the Alliance for Sustainable. . To figure out how many kWh can a solar panel generate or how many kilowatts does a solar panel generate, you need to consider these core factors: 1. Panel Wattage and Efficiency Solar panels are rated in watts, which tells us their maximum power output under perfect conditions. Most residential.
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