The Sunforce 400 watt marine wind turbine is a great source of electricity for appliances and electronics on your boat or at your cottage. Using patented high wind over speed technology, this lightweight and quiet wind generator has a maximum power of up to 400 Watts or 27 Amps in Ideal Conditions. The generator will automatically shut down when batteries are charged to minimize wear. It's completely weatherproof and, with only two moving parts, it's virtually maintenance-free. This product includes a 3 year manufacturer's warranty from the date of purchase. Tower kit sold separately.