Leonardo David is a writer and energy consultant who has worked on projects funded by the Inter-American Development Bank. An electromechanical engineer, he has written about solar energy and the ...

Solar panels typically last 25-30 years ... Considering the difference between a 7 kW system and an 8 kW system is almost $3,000, it's smart to get your electrical loads as low as possible ...

For example, based on our average cost of a solar panel at $3 per watt with installation, a 6 kW system would run you around $18,000, while a 12 kW system would double the cost. The cost of your ...