Hi, its connected to 3 batteries, to charge them up, thats as far as I got with it, the batteries are very old and i don't believe they want to be charged any more, dead cell,LOL, One of these days I need to get back to it, rebalance it, make a much higher tower, longer blades to grab a bit more wind so it will spin with less wind speed it takes about a 20 mph + to get it going, and then its still stalling out. We get a few breezy days but for the way it is set up now not near enough constant wind speed to keep it spinning the way it needs to be. It is fun to tinker with though.