I've been using it to charge a 12v battery for about a month. It has quality construction and works in low light conditions. Suggestion to seller: add some assembly parts instead of forcing the buyer to find their own solution. I picked up 4 packs of repair plates and some #8 HD screws for less than $5 total. I considered deducting a star due to the lack of hardware, but then decided to leave it at 5 stars since the description was correct.