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 . Advancements in batteries have brought us to the next ‘Energy Transition’ View Post . Why is lithium better than lead acid for solar? View Post . LifePo4 batteries are some of the safest batteries in the world View Post