We are a small electronics company based in Hawi, Big Island. We manufacture solar controllers to the highest quality and if you are running a 12v system with the pump wired directly to the P.V. panel, hese controllers will improve your system's efficiency by at least 100% Now that is a bold statement and after fitting yours if you are not happy with it within 2 weeks send it back for a no messing refund, we'll pay the postage Our customers are quite amazed the difference it makes 5