thanks indy , after looking at what you sent me i have a couple ideas, now i can at least see the terminals that would sense removal of ac power. also i noted that it said the unit will not turn on if the voltage is below 24-25 volts. not sure how this is working, as only have 2 12 volt batteries which equal 24 volts. but maybe the charging circuit and capacitors on the board boost it up to the recommended voltage of 27 volts to operate correctly. probably as simple as new batteries, even though i was reading 24 volts. will see thanks again.
