I have a strange problem with a Quattro-II 24/5000/120-50/50 (new unit).
I did some conditional AC input settings to use AC when the loads exceed 4000W along with using AC on 60% SOC up to 28.00VDC.
It worked fine for two days then suddenly popped a battery low warning and shutoff and was reading 14V while the batteries were still above 25V.
After that moment every time i try to use the conditional AC input settings it tries to 'start' inverting then stops with a low battery error reading random voltages each time bellow 14V despite the batteries being completely charged at 28.8V. If i turn the conditional AC input off it starts reading the correct voltage again and works but the moment i re-enable the conditional AC input it pops wrong again. Does anyone have any idea if it's a faulty unit or any potential issues that could be causing this problem?
The system is paired with two Smartsolar 150/85 MPPT's which read the voltage properly consistently and 10x 200AH AGM 12V batteries making a 1000AH 24V pack.
I did consider the possibility of 1 or more batteries being faulty and dropping voltage immediately when power is being drawn through them however i wasn't able to find any as well as the MPPT's weren't reading a drop either.
P.S i did update the unit to the latest firmware along with restoring all settings to default,still does the same when trying to use conditional AC input.
Thank you in advance.