Classic 150SL tripping circuit on inverter

[auroralm]

Hi--
I have a Classic 150 and a Magnasine inverter.  I have 8 panels on the roof and three lithium batteries with 640 capacity.  I haven't have this problem before.  Yesterday my batteries unexpectedly drained all the way down, which doesn't really make sense since we had a lot of sun.  Whenever my batteries get to zero, I get a ground fault message, but as soon as the batteries start to charge it goes away.  That happened today.

I turned off two of the three battery charge buttons so I could start by getting one fully charged up.  Done this many times before. Normally, when the sun's fully out and overhead I'll get about 2000-2100w coming in from the roof.  Today the classic was showing up to 2900 watts which seems strange.  And then the Classic circuit on the Magnasine trips.  It also does this when it's raining and hardly any power is coming in.  I have enough juice to charge my laptop and LED lights, but no fridge or stove. (Normally I can easily cook on a hotplate and run a standard full size fridge/freezer plus fans and air filter with no problem.)

I am not tech savvy, so if you have suggestions, please assume no knowledge and explain.  I have some learning disabilities that make it hard for me to learn and retain technical language. Thanks.

[ClassicCrazy]

What do you mean when you say your batteries get to zero ?
Zero SOC , Zero volts ?
A lot of it depends on how your system is set up programming wise.
Lithium batteries have a BMS that is involved and can cut off the batteries.
Also if the breaker from PV to batteries is tripped nothing is going to charge.
You can get higher charging watts than you might think of normal at certain times of year due to sun angle, temperature, air humidity level, etc.
You may be best trying to find a solar installer familiar with your system to check it out.
Often when we ( forum volunteers )  help people solve problems with their system - unless it is a programming error - we would ask them lots of technical questions and to use a meter to check on voltages, open  the system up and check for loose connections , etc.
If you can't do those kind of things it is probably best to have someone with experience look over the system - there are so many things that could be going on with your system .
And personally I am not familiar with Magnum inverters .
Larry

[australsolarier]

i would definitively get a better quality breaker.