My Van Build solar system shut down and no idea how to turn it back on? Help!

[jjosephiina]

This has never happened before, and i full time with this
system. I was under shade, and running one small fan
while charging my laptop. even while in shade all day, i've
never gone below 65%. I was making breakfast when i
heard some beeping and then all of a sudden my whole
system shuts down. I tried getting into the sun and trying
to turn everything off and on but it's no longer working.
Did i do permanent damage? (
specs: -80 Amp MPPT Solar Charge Controller
-125VDC MidNight Panel Mount Breaker
-300Amp Class T Fuse
-12V 3000W Continuous 6000W Surge Peak Power Pure
Sine Wave Inverter
-3 12V 206ah lithium batteries (wiring them to keep them
at 12v)
-4 200W Solar Panels

 

[Bobert]

do you have a multi meter?

 

[Al D]

It sounds like the inverter shut down due to low voltage. You're set up is under paneled. Is it possible you were at 65% SOC yesterday and, perhaps, used a lot of power today?

 

[HRTKD]

Check for blown fuses, tripped breakers. That's the easy stuff. If you can connect to shore power that may be the easiest way to get the system charged back up. More information on your system would be helpful, especially details on how you wired the batteries. A photo would be good enough.

 

[Sojourner1]

What bms? How do tell your SOC %. Can you see individual cell voltages? How often do you charge full to reset capacity % ?