Lets do a rough calculation: - assuming a 10KW load which is not unreasonable given HVAC included and a dozen servers - Lead-Acid has an energy density of ~40Wh/KG - so you need at least a 250KG battery per hour - at 8 hours you're looking at at least 2000KG alone for the battery (at least)
I'd recommend a battery + generator solution... On Wed, Nov 17, 2010 at 12:30 PM, Daniel Clark <[email protected]> wrote: > On Wed, Nov 17, 2010 at 12:25 PM, Chris Hoogendyk > <[email protected]> wrote: > > I have no idea how that home brew UPS you linked would have performed in > a > > similar situation. > > Thanks - at least one useful thing I've gotten from this thread is > that whatever I end up doing, it would seem to make sense to have > smaller COTS "front end" UPS units, connected to whatever backend (be > it COTS or DIY), and have separate "front end" units for servers and > HVAC. > > -- > \|/ Daniel JB Clark | Activist; Owner > FREEDOM -+-> INCLUDED ~ http://freedomincluded.com > /|\ Free Software respecting hardware > _______________________________________________ > Tech mailing list > [email protected] > https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech > This list provided by the League of Professional System Administrators > http://lopsa.org/ >
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