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 . One of the biggest problems in Lebanon is the exceptionally poor construction quality of its buildings View Post . Lebanon has some of the best solar irradiance in the world View Post . A good inverter should have a power factor of almost 1 View Post