@owashii@plush.city Oh i was confused, you're talking about a UPS (an *uninterruptible* power supply, not universal)
-F
@owashii@plush.city do you know if your UPS is double-conversion or not? a double-conversion UPS *always* goes through the battery, which means that there's literally zero interruption when power is lost, but also that the output inverter is a limiting factor no matter what, whether wall power is available or not
that sounds like it's what your problem is
-F
@owashii@plush.city offline and line-interactive UPSes just switch mains power directly through when they do have power, and switch a relay when mains power is lost; this means that when power is lost, the output loses power for a few milliseconds, but this isn't a problem for most things since they're designed to deal with AC that keeps dropping to zero momentarily anyway
-F
@owashii@plush.city the fact that mains power is just directly connected through, however, means that there's no limit on the current they can output (provided proper wiring is used) other than the limit on what it's plugged into (15 or 20 amps for a standard US residential circuit)
-F