Deka DC31DT battery? Deep Cycle?

SoundGuy wrote:
OK, one more time - when comparing one deep cycle battery to another you want to be comparing them at the 20 Hr rate. That DC31DT you're referring to is 20 Hr rated @ 105 AH, two would offer 210 AH, so obviously a pair wired in parallel drawn down to 50% SOC would offer you ~ 105 usable AHs. As far as heavy inverter draw is concerned 12 volt jugs will inherently suffer less voltage drop under heavy load than a pair of similarly rated 6 volts in series simply because internal resistance will be lower.