Mine only lasted 30min even with no load I'm sure this ups have timers I even put a dan inside tool small battery out and put external car battery which I will charge with crek charger but still and 50w load
Guys I have a eaton 5e I gad same problem uts 360w. I am only using 90w. It switches after 30 minutes no mater what even if there mo load, u found this strange so I opened it and saw there was no fan I decided to put. Fan then I took out small battery from inside out I put external car battery...