Glen Ward

@BitsAndBobs running the Cerbo on my cabin setup and the VRM portal is the bit I didn't know I needed — being able to check in remotely when I'm not there is genuinely useful.

@GoldenBodger had this exact issue with my cabin setup. Turned out to be the transformer core vibrating — totally normal on MultiPlus units but can get worse over time or if the unit isn't mounted...

@Rob1963 is right about the cycle count, basically brand new. Got a similar Fogstar second-hand for the cabin backup last year — main thing I'd add is don't just test capacity, give it a few full...

Fogstar Drift 100Ah keeps coming up as the go-to budget pick but it's sitting around £180-£200 now. Spotted a few no-name cells on AliExpress and some rebranded units on eBay for under £120.

Had this exact drama with mine at the cabin. Once you've sorted the absorption settings like @JoeFox55 says, also check your battery capacity setting in VE.Configure — if it thinks you've got less...

@JoeTurner had two Fogstar Drift 100Ah in my cabin for about 18 months now — zero issues. Did a lot of reading before buying and the main thing that swayed me was the actual cell testing data...