Using Backup UPS as Power Invertor?

Maybe, assuming that the UPS is capable of sustaining the load for that long.

Many of the "entry level" UPS units list their output as 350VA, but only for 5 minutes (long enough to shut down a PC). Some of these use very small batteries and the internal components may only be rated for short, intermittent use. Read the label VERY carefully before buying the least expensive UPS that seems to fit. I have one of these on the VCR (so it doesn't lose programming and my wife gets to tape her soaps), but the VCR is a *very* small load compared to the rating of the UPS

My network UPS is an APC rated at 180VA (or so) which runs from a sealed lead-acid (SLA) battery. It will keep the network (DSL modem, router, 8-port switch) running for over an hour - not quite as long as the laptop battery lasts...

More about me:

You should check what the waveform that comes out of the UPS is like; they aren't all the lovely smooth sine wave you get from the mains, so make sure the kit you want to use is OK with the waveform the UPS inverter produces.

Running a computer for an hour shouldn't be a problem, that's what most UPSs are designed for. I doubt a battery charger would be a problem either.

Tim

:My network UPS is an APC rated at 180VA (or so) which runs from a sealed ^^^^^ :lead-acid (SLA) battery. It will keep the network (DSL modem, router, 8-port :switch) running for over an hour - not quite as long as the laptop battery :lasts...

Have a nice day, Pradeep