While we typically do not measure how much solar will be needed based on square footage of a home, our experience installing solar panels tells us the following: A 1,500 sq ft home will require between an 8 and 11 kW solar system. A 2,000 sq ft home will require between a 10 and 13 kW solar system. A 2,500 sq ft home will require between a 12 and 15 kW solar system. A 3,000 sq ft home will require between a 14 and 17 kW solar system. A 3,500 sq ft home will requite between a 16 and 19 kW solar system. A 4,000 sq ft home will require between an 18 and 21 kW solar system. And so on…