RoofMill™ complete Grid Tied Wind/Solar 3 Rooftop Turbine Home Energy Kit, HO-4.2 kW, Maximum Output 4200 watts, includes 3 HO Wind Turbines, Blades, Cones, Rotors, Tails, Roofmount Kits, Charge Controllers, 6 Solar Panel Kit, Hardware, and Grid-Tie Systems. This is an HO Hybrid Wind/Solar Power system with maximum output of 4,200 watts. Kit has all required components. Customer must add batteries and some required wiring.