Solar panels are priced in watts. If you bought directly from the factory, the current price is 0.17-0.25. So a 400 watt panel would cost between 68 and 100 USD. 0 Share This Previous Post← How much electricity will one solar panel give me? How much electricity will one solar panel give me? Next PostChina is building a solar OPEC → China is building a solar OPEC You May Also Like . Wiring in conduit saves money even in the short run View Post . LifePo4 batteries are some of the safest batteries in the world View Post . A building over 10 floors high is extremely difficult to power with solar View Post