The answer depends mostly on how much air conditioning you consume. If you use a large central AC, a solar system could easily cost you 100,000 USD or more. If you use AC responsibly, it could be as little as 8,000 USD. 0 Share This Previous Post← Rich countries control poor countries through energy poverty Rich countries control poor countries through energy poverty Next PostWiring in conduit saves money even in the short run → Wiring in conduit saves money even in the short run You May Also Like . Solar panels are made from silicon ingots View Post . The most expensive (and ugliest) part of traditional electricity systems is the grid View Post . Safety is critical in solar systems View Post