Introducing the revolutionary 400W Wind Turbine Generator from Gridless Revolution - the ultimate solution for green energy enthusiasts! With its advanced design, this wind turbine is built to withstand even the harshest weather conditions, making it extremely durable and long-lasting. Gridless Revolution's super easy maintenance and durable wind turbine is a highly improved version of today's popular and modern import turbines. Assembled and quality checked in USA, you can rest assured you are making a great investment with this turbine. Top Features: Cool stealth colors like black camo and digital camo! High performance Moflon slip ring can be easily replaced in 20 minutes. Moflon is a Japanese company that specializes in robotics slip rings. A slip ring allows the turbine to rotate with the wind direction without coiling your wires. It's necessary to avoid coiled wires, otherwise your connections may become damaged. Slip rings need to be replaced every few years and most turbines in this class either don't have a slip ring, or it can't be replaced easily. Assembled and quality checked in USA Specifications: Rated Power : 400W Rated Voltage : 27-54V DC (with supplied charge controller) Battery Voltage : 12V / 24V DC (12V with supplied charge controller) Open Circuit Voltage @ 500 RPM: 9.6VAC / 13.26VDC Open Circuit Voltage @ 1900 RPM: 36.8VAC / 54.1VDC Start-up Wind Speed : 2.5 mph Rated Wind Speed : 27 mph Max Wind Speed: 50 mph Number of Blades : 3 Material of Blades : PBT Blade Swept Diameter : 48 in Shipped From : TX, USA Warranty: 5 years Included in the box: (1) Wind turbine (3) Blades (1) Pack of bolts and nuts for flanges and blades