How to get a UPS to turn on without being connected to AC? Answered
I want to use a UPS and a car/deep cycle battery to get AC power when away from outlets or when the power is off. ie what I want is to be able to have my UPs attached to a car battery and turned off and then when I want to use it turn on the UPS and have AC power.
That would seem easy enough. But it doesn't work. My UPS works fine on the battery if it is connected to AC and then unplugged while turned on. However I can not get it to trun on without being connected to AC.
What do I do? I have tried two different UPSs.
I am including ictures of my UPSs.
The white one is APC 280VA model.
The black one is 650VA APC model.
I would prefer to use the black one but I could use the white one.
Thanks for any help.
If you need more info just let me know.