I will have 2 devices running about 55 Watts a piece connected to a battery backup and i need them to last for anywhere between 2-5 hours. Any input would be appreciated!
BTW, looking for specs. forgot to put that.
Most UPS's only have a 7 amp hour battery which would only run those two things for about 45 minutes. 5 hours would take a system with a battery almost as big as a car battery. If the devices can run off of 12 volts DC it would be better to run them from a large battery with a charger attached. Or, if you need 120VAC, a small inverter/charger hooked to a large deep cycle battery. That would pretty much be a big homebuilt UPS.
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