I have an Ecotech backup battery for my MP. It has two dc outputs, both 12v. Ecotech told me it is a 18 amp hour battery. I would like to use one of the 12v ports to my Apex, so if my GFCI trips which it will, my MP will run and my Apex can email me to reset. So you believe it does not matter the amount of amp the Ecotech battery puts out???