[RE-wrenches] questions about solar charging 72v UPS

Ron Young solareagle at solareagle.com
Tue Feb 8 19:07:27 PST 2011


Hi All,

I recently acquired some UPS units that are a high end portable units (GE GT3000). They are nearly new and I would like to rig them up as a standalone emergency back-up power source with a solar (or wind) charging option. These units have sine wave output and are a double conversion type, i.e. power out is isolated from power in by ac to dc to ac conversion. The main problem I have is that the battery pack is 72v. It is expandable and I can add up to four additional packs to increase the runtime to over three hours at half power (1200 watts). How do I charge this type of battery pack with solar? Is there a charge controller out there that will provide nominal 72v? 
http://www.gedigitalenergy.com/PowerQuality/catalog/gtseries.htm

Best Regards,
Ron Young
earthRight Products - Solareagle.com
Alternative Energy Solutions ~ Renewable Energy Products
1-877-925-2929
blog: http://www.earthrightsolar.tumblr.com
website: http://www.solareagle.com
email: sales at solareagle.com
79F North Third Ave
Williams Lake, BC
V2G 2A3

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