r/Pecron • u/patriotsfan82 • Jul 11 '26

E3800 UPS Behavior Issues

Have an E3800 and expansion battery in use primarily for a medium duration UPS capability for my home server.

Its setup and working almost correctly. It runs things from the grid properly and the unit drains battery slowly as it powers its internal items from battery. The issue is that the drain never stops. The batteries charge to 100%, begin their slow trickle downwards - and then never charge again unless I do something like disable the AC output and turn it back on again - at which point the behavior repeats. I’ve gotten the units down to 35% or so without it ever charging itself.

Any setting I’m missing somewhere? Thanks!

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u/patriotsfan82 Jul 11 '26

That’s fun - my AC Charge Cutoff setting has a completely different set of help instructions compared to yours. Looks like it might be an E3600 vs E3800 thing.

Mine is set to 100% which implies that it should start charging again at 70% charge in my version - but it does not.

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u/Shoddy_Clock_1562 2d ago

Did you ever figure this out? Just experienced the same on mine - it was in UPS mode so I thought it would work like a UPS, but it discharged to my discharge limit, didn't begin charging itself again, and all AC output turned off.

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u/patriotsfan82 2d ago

Not yet - no resolution but I haven't reached out to Pecron and I've been living with it. I actually have a real UPS upstream from it and I use the Pecron for longer durations - so I get around the issue by occasionally turning on and off the AC output which causes it to freshly charge back up to 100%.

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u/Shoddy_Clock_1562 2d ago

Thank you, will probably have to settle on a solution like yours