 Skystream 3.7 Skystream 3.7 is a breakthrough in a new generation of RPAs (Residential Power Appliances) that is changing the energy landscape of how homes and small businesses receive electricity. Skystream is the first fully integrated system that produces energy for less than the average cost of electricity in the United States and it produces usable energy in exceptionally low winds. Tower heights include 33, 45, and 55 ft. Turbines on taller towers tend to produce more power due to stronger, less-interrupted wind. Skystream's universal inverter delivers power compatible with any utility grid from 110-240VAC. Skystream efficiently and quietly provides 25-30% of the energy needs for a home or small business. Any extra energy is fed into the grid spinning the meter backward. | Model | Skystream 3.7 | | Rated Capacity | 1.9 kW continuous output, 2.6 kW peak | | Weight | 170 lb (77 kg) | | Rotor Diameter | 12 ft (3.72 m) | | Swept Area | 115.7 ft2 (10.87 m2) | | Type | Downwind rotor with stall regulation control | | Direction of Rotation | Clockwise looking upwind | | Blades | Fiberglass reinforced composite (3) | | Rated Speed | 50-325 rpm | | Maxium Tip Speed | 216.5 ft/s (66 m/s) | | Alternator | Slotless permanent magnet brushless | | Yaw Control | Passive | | Grid Feeding | Southwest Windpower inverter 120-240 VAC 50-60 Hz | | Battery Charging | Battery Sensor available for battery charging systems | | Braking Systems | Electronic stall regulation with redundant relay switch control | | Cut-in Wind Speed | 8 mph (3.5 m/s) | | Rated Wind Speed | 21 mph (9.4 m/s) | | User Control | Wireless 2 way interface remote system | | Survival Wind Speed | 140 mph (63 m/s) | | Warranty | 5 Year Limited Warranty | |