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25 August, 2008
Utilizing a APC UPS back surge - Outback

At present my 2200's ( I have two ) use the onboard charger in the
UPS, which you CAN disable. ( there are lots of how to's on the
internet, but basically you clip a wire )

I have a solar charge setup that charges a very large battery bank 24
vdc battery bank that is seperate from the UPS battery banks.

both of my inverters use a 48vdc battery setup and i have a seperate
48vdc charger that i could use on those batteries, IF I NEEDED it. But
never have hooked it in.

I operate both UPS's standalone for my studio power and charge from
the grid. HOWEVER if I ever needed to charge the 48vdc batteries from
the solar, I would use the 48vdc charger I have.

My solar battery setup is 24vdc and uses a Xantrax charge controller.
That charge controller can be setup to charge 12, 24 or 48 vdc by
changing the switches. I have one extra as a spare.

SO if I needed to charge those other batteries in an extended grid
down situation I could use my 48vdc charge, or the Xantrax configured
for 48 vdc or the generator running the 48vdc charger.

My 48vdc charger is a LaMarche unit that will put out 50 amps and came
out of a Telecom install, has a normal and equalize switch and will
run on 120 or 220 VAC.

I have a two large battery banks on the two 2200's with each having
it's on fuses, and all hardware.

the batteries will run my studio lights, and computers for a long
time. I've ran it for 12 hours straight and only drained the batteries
halfway. Now I am NOT RUNNING 2200 kva and I guess the load is
somewhere around 200 watts on each UPS/Inverter.

I have all the necessary stuff to charge those batteries from my array
or solar, or gennie if need be. but at present leave it all as
installed until I need to make adjustments.

It does irk my wife when we have a power outage on the house ( not all
hooked in to the solar setup ) and the studio has full lights,
internet and computers, but the house only has lighting.

I plan to install two large whole house inverters someday that will
run both sides of my home panel, but at present only have this
capability on the studio.

those APC UPS's are long lived and even when i ran them for 12 hours
straight did not get hot or anything, but the fans did run the whole
time. But then again I did not have them at full load either.

i agree with www.homebrewpower.co.uk that the BEST inverters going these days are the
Prosines, or the Outbacks, if you can afford them

These 2200 i payed 100 each and put in my own large battery, as the
batts that came with them were shot. 100 was cheap enough, and i know
I could use them as main inverters in a pinch.

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Written at Monday, August 25, 2008 by Andy Mahoney.
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