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BWC EXCEL Wind Turbine

With a modern design that has proven itself for high reliability, low maintenance, and automatic operation in adverse weather conditions, the Bergey Windpower Company EXCEL is a 6.7 meter (22 ft) diameter, 10,000W wind turbine that is now the established favorite of many homeowners and professionals.

It's for good reason that, since its 1983 introduction, the BWC EXCEL has distinguished itself as the best-selling wind turbine in the 2 kW to 20 kW size range in the world, having been installed in over 30 countries.

For example, in November of 1984, Pacific Power & Light (through its subsidiary OnSite Energy) installed leading remote wind turbine products (3 kW Northern Power Systems HR-3, 10 kW BWC EXCEL, and 17.5 kW Jacobs 10-23) on a telecommunications site at Duncan Mountain, Idaho, for the purposes of product and technology evaluation. The site is very remote and accessible only by helicopter during the winter. Since installation, the BWC EXCEL has achieved nearly 100% availability, while the next most reliable turbine in the PP&L test program had an 84% availability in the first five years. The other turbines at the site have now been decommissioned and the EXCEL is providing prime power to the telecommunications facility.

Ruggedly built, the BWC EXCEL set the standard with the longest warranty (5 years) in the industry. With only 3 moving parts of heavy duty construction, this proven unit has a life expectancy of over 30 years with no scheduled maintenance required. It is available in two configurations: battery charging and grid-connected (the pumping version is not currently available).

The EXCEL wind turbine series is nominally rated at 10 kW. However, in a battery charging application, there is an inherent load matching problem between permanent magnet alternators and battery banks. The EXCEL-R is the battery-charging model, optimized for low wind speed performance, which maximizes energy production. But providing the best performance in low winds results in some reduction in peak power under high wind conditions. Therefore, the EXCEL-R is rated at 7.5 kW.

The turbine is aligned into the wind by a tail assembly. The tail boom and and integrated rotor/alternator assembly attach to the mainframe assembly, which incorporates the yaw-axis slip-rings and the tower interface. The geometry of the mainframe creates the passive Autofurl® high wind speed protection. The mainframe offsets the rotor and yaw axes such that rotor thrust produces a furling moment about the yaw-axis. The weight and inclined pivot of the hinged tail provides a preset resistance to the rotor furling moment. Overspeed control is initiated at 13-15 m/s (30-34 mph) when rotor thrust overcomes the tail resistance and restoration is caused by gravity as the wind speed subsides. The EXCEL has no shut-down wind speed. The turbine can be manually shut-down using a furling winch installed at the base of the tower.

Battery charging BWC EXCEL's can be supplied with outputs of 48, 120 or 240 VDC. They are well suited for large rural homes, remote villages and facilities, eco-tourism resorts, and larger telecommunications sites.

Connected to the grid, the BWC EXCEL can provide most of the electricity for an average total electric home at moderate wind sites. It's GridTek 10 power processor (inverter) is the most advanced in the industry and it carries a full UL certification to the latest utility standards.

We invite you to review what some very satisfied local homeowners said about this great wind turbine for a recent newspaper article.