dwh
Tail-End Charlie
Any thoughts on why the starting battery bank also only last a bit over a year? I’ve never had starting batteries that didn’t last 6-8 years before.
Could be due to the ACR. House batts are low, engine off...the house batts slowly suck down the engine batts till the ACR finally disconnects. Then the engine batts sit around less than fully charged.
Then maybe add not enough drive time to regularly top off all batts. That takes many hours, just pushing it up to 14.5v isn't enough - they still need hours to finish absorbing.
The good charger should fix it. It'll top off all batts through the ACR.