Inverter Switches Off After a Couple of Minutes

I've just pulled into a site with no shore power and as I was setting up I switched on the inverter (via the remote button in in the galley) and ran the auto program of the TV(s). Midway, the TV's turned off and although the remote button LED remained lit and green, I could hear the inverter was no longer operating. I tested it on a lamp and it did the same then again with nothing drawing on the inverter. Each time it stopped operating after about two minutes. I'd used the inverter about two weeks ago for a week with no issues. Does anyone have any insight as to what the problem may be? Thanks.