Hello Wrenches: We have a customer who's got one of the Excel One wind gennies, and he's burnt up two Classic controllers (overvoltage....the 2nd time it got over 400V before it burnt up). Bergey's been dragging their feet as to why this is happening; they're saying it's probably an "upslope site" where the RPM just gets too high, among other things. Metering tests prove that the stator is OK. They also said that Midnite Solar has a 'clipper' to prevent overvoltage; do any of you have any experience with this device? It's ~$1200, and of course there is no mention of this on Bergey's web site or in their XL.1 manual. I have several other XL.1s in the general area, but they are on their old 24V controller. So I am looking for more information on anyone who's using this 'clipper'. Please feel free to contact me off list. Thanks! Chris Daum Oasis Montana Inc. 406-777-4309
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