I was thinking about getting a UPS but then I thought about other options as I am looking at running around 3-4 computers and a modem for close to 5 hours.
After some research I have found multiple resources that suggest using a car battery charger / power supply into a battery then into an inverter. This has flaws:
Dual conversion (power loss) and the car battery wont be any where near enough for 5 devices.
I thought I'd take a different approach:
Battery Charger (high amperage) 12 or 24V battery then 12 or 24v psu (often used in car pc's and I have found models that can output 200-300w)
What I'm stuck for ideas on is what I can use for a cheap, simple battery charger? Idealy it will output 20amps.
Any ideas guys? I know this is the best place to ask
