A solar power system can produce approximately 10 to 20 kilowatt-hours (kWh) per day for every 100 square meters of solar panels installed, depending on various factors including location and panel efficiency. In a perfect world, the average roof in the U. But also, the world isn't perfect. Realistically, your roof's solar generation potential will be less than that. It'll likely still exceed. The answer lies in something most solar salespeople never properly explain— solar irradiance and your actual energy potential per square meter. But "ideal" rarely exists. Solar rooftop potential for the entire country is the number of rooftops that would be suitable for solar power, depending on size, shading, direction, and location. Formula: Panels = (Roof Area × Usable % × (1 − Spacing Loss %)) ÷ Panel Area → Total Capacity (kW) = Panels × Panel Wattage ÷ 1000. Under optimal conditions (5 peak sun hours): At noon under direct sunlight: *Note: 1m².
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