Designed for European market only. Please see the Excel-S/60 for U.S. equivalent. Bergey WindPower's grid-intertie BWC Excel-S/50: Peak power of 10kW. 220 VAC 50 Hz Single-Phase includes Gridtek 10 inverter. Made for grid intertie - no batteries needed. The BWC EXCEL is a modern 6.7 meter (22 ft) diameter, 10,000W wind turbine designed for high reliability, low maintenance, and automatic operation in adverse weather conditions. The BWC Excel is a ruggedly built turbine that comes with a 5 year warranty. Connected to the grid, the BWC EXCEL can provide most of the electricity for an average total electric home at moderate wind sites. The all new GridTek 10 power processor (inverter) is the most advanced in the industry and it carries a full UL certification to the latest utility standards. The BWC EXCEL is most often installed on a guyed lattice tower, which is available in heights of 18 m (60 ft.) to 37 m (120 ft.). Tilt-up versions of these towers are available for sites without crane access. Non-guyed lattice type towers and monopoles (tapered tubular) towers are also available to heights of 37 m (120 ft). You may also supply your own tower if you follow BWC's technical requirements for Excel towers. Bergey wind turbines operate at variable speed to optimize performance and reduce structural loads. Power is generated in a direct drive, low speed, permanent magnet alternator. The output is a 3-phase power that varies in both voltage and frequency with wind speed. This variable power (wild AC) is not compatible with the utility grid. To make it compatible, the wind power is converted into grid-quality 240 VAC, single phase, 60 hertz power in an IGBT-type synchronous inverter, the GridTek Power Processor. The output from the GridTek can be directly connected to the home or business circuit breaker panel. Operation of the system is fully automatic. Specifications Start-up Wind Speed: 3.4 m/s (7.5 mph) Cut-in Wind Speed: 3.1 m/s (7 mph) Rated Wind Speed: 13.8 m/s (31 mph) Rated Power: 10 kW grid intertie Cut-Out Wind Speed: None Furling Wind Speed: 15.6 m/s (35 mph) Max. Design Wind Speed: 54 m/s (120 mph) Type: 3 Blade Upwind Rotor Diameter: 6.7 m (22 ft.) Blade Pitch Control: None, Fixed Pitch Overspeed Protection: AUTOFURL Gearbox: None, Direct Drive Temperature Range: -40 to +60 Deg. C (-40 to +140 Deg. F) Generator: Permanent Magnet Alternator Output Form: 3 Phase AC, Variable Frequency (Regulated 220 VAC 50 Hz with GridTek inverter).