DT/ EBL220 gone mad

[rustyspanners]

Hi I have a problem with my moho, I changed to lithium bat, fitted DCDC charger and bypassed the EBL220.
All was ok as I got van ready for trip away.
Tried fridge on gas ok, tried Alde heating on EHU ok then tried on gas no go red light came on 3010 controller.
Then no radio and no lights on fridge control unless engine running.
DT220 reading starter bat as 24v its only 12v.
All very strange ferry booked for Friday
Any help would be appreciated.

 

[rustyspanners]

Hi I found the fridge board had burn marks on it.
That must be why it had gone dark

 

[Okta]

With your B2B bypassing the EBL have you disabled the split charge relay? When I first installed a B2B in my Hymer in 2016 I got all manner of strange voltages. I diverted the B2B to go through the EBL and the problems disappeared. The better alternative might have been to disable the split charge relay. I have no idea why or how the original voltage surge was caused but the electrical loop created by the split charge arrangement was certainly involved. The loop must be avoided for lots of reasons.