Question Cyberpower CP1000AVRLCD UPS, Voltage, Battery up-size (hack), runtime

[LinwoodFerguson]

I am tired of replacing the little UPS batteries in my three Cyberpower UPS's. I just replaced one in the CP1000AVRLCD with a 35ah AGM Deep cycle, and it now has about 90 minutes runtime (maybe more). But this caused me to look more closely at some aspects and I am confused.

First, before and after replacement, the Cyberpower Software Powerpanel for Business shows the battery at 20v. It is a 12v battery, it should show about 13v +/-. Again, before and after my change, so unrelated.

Is the software just flakey? Is there some kind of buck converter in front of the inverter that is raising the voltage and measuring that?

After replacing the battery with the large one I ran a test (see the events below). It ran almost 90 minutes but then gave the really strange error "not completed, the battery runtime is insufficient". After all that time.

My guess is the firmware or software is just hard coded to work with tiny batteries, and giving false information. As it is recharging it's got nonsense numbers also, the 42% is probably right, but the 8 minute runtime is nonsense.

Has anyone else hacked Cyberpower UPS's with larger batteries, is there any fix to get the estimates correct, so I don't get alarms that are bogus if it starts to discharge (I've simply turned the shutdown of the PC off, but I guess it might shut the UPS output off incorrectly as well).

Linwood

 

[Lutfij]

Has anyone else hacked Cyberpower UPS's with larger batteries,
A crude search off the www lead me to this reddit. There are videos on YT of people modifying their UPS's as well but I'd take that with a grain of salt.

 

[LinwoodFerguson]

Sorry, I found lots of examples of people doing it, but none seemed to explore the interaction with the monitoring software. The actual "hack" in this case was just a piece of wire to hook up the battery, hardly exciting, and that's also what most of the youtubers are doing.

I'm interested in people who might have looked into the charging circuitry and/or firmware and in particular how the larger battery is failing to be reflected in estimated runtime?