Hello Daniel:
Not knowing your load exactly my first inclination is that you can't get there from here. The load from the HVAC system will be considerable, so you would have to have a significant battery string to be able to maintain load during an extended outage. The power fluctuations are not a problem for UPS within reasonable limits. They all do power conditioning on input and output power, as far as I know.
How much load are we talking? You basically need to get the load for all of your devices and then use the manufacturers specifications to determine how much runtime you'll get from a particular unit.
In general, the normal configuration would be to have enough UPS available to get you to generator power so that you don't have to go to battery too often or for too long. You will end up replacing a *lot* of batteries if you're running them for hours at a time on a frequent basis.
Mike
-- Michael K. Smith [email protected]
Looking for a UPS system that:
1. Runs off of US 115V / 20A
2. Can handle frequent extended power outages while continuing to
provide power to computers and HVAC systems (so amp spikes will be
common)
3. Preferably is expandable (I'd prefer stackable to rack mount, but
not a big preference)
4. Isn't insane-loud
Anyone have anything they like?
I'm sort of tempted to do http://www.dansdata.com/diyups.htm but if
there is something COTS that is somewhat price-competitive with that
I'd prefer it for safety reasons.
But in general just general recommendations would also be great, as I
haven't dealt with UPS systems larger that 4u units in the past, and
the ones I did use I wasn't really impressed with (insert horror story
about spending hours and waiting weeks to get replacement batteries
for MGE UPS units here.)
Happy Hacking,
--
\|/ Daniel JB Clark | Activist; Owner
FREEDOM -+-> INCLUDED ~ http://freedomincluded.com
/|\ Free Software respecting hardware
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