Well I have a Cyberpower 3000 sine wave output ups in the basement fed with
two banks of 4 12 vdc 38 amp hr Hawker absorpion gas mat batteries wired in
series...The ups specifies 48 vdc battery banks, normally of much smaller
capacity. It just takes a long time to get the batteries charged.
Works perfectly well for me!
One think I did do is build a Faraday shield out some aluminum screening
over the Cyberpower ups and the battery pack, gounded to an 8' ground rod
thru the basement wall to keep the inverter noise out of the hf rigs.
The Cyberpower feeds the radio station's power supplys and the pc on the
main floor thru a dedicated ac outlet.

"Jimmie D" wrote in message
...

"Clever Monkey" wrote in message
...
wrote:
I was thinking about using a UPS as a power supply for an amplifier.
The UPS is rated at over 2KW and uses 48 volts on the DC bus. I have
tried powering an amp directly from the batteries and it seems to work
OK. Battery pack is rate at 20 amp/hr. The inverter side of the UPS is
dead but the charger side is still functional. The plan is to remove
the inverter circuit completely. Can anyone think of anything wrong
with doing this.

Bear in mind that even with light use, the batteries will eventually have
to be replaced. APC, for example, rates their SOHO UPS devices with
replaceable batteries at 2-3 years between change-ups.

However, this is an excellent way of maintaining a decent shack when the
lights go out.

I have some 100 amp/hr batteries, I was wondering if they might work with
the UPS charger.

Jimmie