2,000 Homeowners Surveyed We have conducted 2 surveys of 1000 homeowners ... while a 12 kW system would double the cost. The cost of your solar system is directly proportional to its size.
Assuming favorable sunlight conditions, a 500-watt panel will produce around 2 kWh per day, and more than 700 kWh per year. Residential solar panels have typical power ratings of around 350-400 W.