I agree it sounds like overcharging. I would also double check to make sure that the battery strings didn't get shortened in the move
I concur.
If they're wired right another explanation is that a cell was shorted during the move, shortening that battery by two volts.
If her total battery consists of two series-strings of individual batteries, which are in turn parallel connected, a shorted cell in one of the two series strings will cause that string to overcharge and constantly run low on water, while the other string never achieves a decent charge. Meanwhile the inverter will run while the sun is out, but once it's down will consider the total battery to be nearly discharged (which the good sttring actually is, because of the low voltage on the other string due to the shorted cell). Once the surface charge is used up, after a very short time, it will shut down. This makes it look like you're not charging, even though the panels, charge controller, and most of your batteries are just fine.
Sound like the symptoms?
You can find the shorted cell by unhooking the string that is constantly running low on water and measuring the voltage on each battery. The bad one will be a couple volts down. Or just notice which cell isn't boiling off as much water.
Meanwhile, a quick patch is disconnecting the gassing string. That will let the good string achieve full charge, getting her system up to half its normal reserve until she can get the bad battery identified and replaced.
