Generally, the power of solar energy irradiated on the earth is about 1,000 watts per square meter
Solar panels using gallium arsenide cells are the most popular today. more efficient, with a conversion efficiency greater than 37%
1 The power per square meter is 370 watts, or 0.37 kilowatt-hour (degree) per hour
Commercial solar cells ordinary 13-22%
Power per square meter is 130-220 watts, power per hour is 0.13-0.22 kilowatt hours (degrees)