The average solar panel generates between 150 to 200 watts per square meter, 2. This output depends on factors like location, orientation, and panel efficiency, 3. Enhanced technologies and optimal conditions can push this figure higher. Here's what's shocking: A single square meter of solar panel can generate anywhere from 150 to 250 watts under ideal conditions. Under optimal conditions (5 peak sun hours): At noon under direct sunlight: *Note: 1m². . To calculate solar panel output per day (in kWh), we need to check only 3 factors: Solar panel's maximum power rating. How much solar energy do you get in your area? That is determined by average peak solar hours. Also, you will learn. . On a clear day, each square metre of the Earth's surface receives approximately 1,000 watts of solar energy, also known as 1 kW/m².