The solar panel output per day depends on factors like sunlight intensity, solar panel efficiency, temperature, and shading. For 10kW per day, you would need about a 3kW solar system. If we know both the solar panel size and peak sun hours at our location, we can calculate how many kilowatts does a solar panel produce per day using this equation: Daily kWh. The amount of solar energy generated daily is heavily dependent on geographical location. A 400-watt panel can generate roughly 1. household's 900 kWh/month consumption, you typically need 12–18. Let's say you have a 350-watt solar panel in Arizona, which receives about 6 peak sun hours per day. How much solar energy do you get in your area? That is determined by average peak solar hours.