I have lifepo4 550w solar and votronics controllers 250& 350 and a votronics b2b. I have set up the fridge to run off 12v using the aes signal from the 250 controller. With the battery at 80% it all works perfectly. Last weekend we went away fridge on alternator, arrive battery now 100% . No aes signal solar sut Down thus no fridge on 12v. Is the votronics controllers working as it should? Way out? Separate switched signal to get battery discharged enough to get aes signal?