Join Date: Oct 2007
My Motorhome: Swift Kontiki 615
Thanked 878 Times in 790 Posts
Is there a switch on the control panel to select which battery is charging ?
Drew’s answer is fundamentally important as, if there is a dud cell, eg if the battery is old, or has been discharged completely, then it maybe beyond recovery.
Sorry, but welcome to MHF, we are happy to try to help, but it maybe a question of suggestion, trial, report back findings, new suggestion etc., until an answer can be found.
Any typo that I make means the errorists win.
Any comments above are only MY OPINION
and should be read as that.