Foggy

Great thread, everyone's covered the obvious suspects well. One thing nobody's mentioned yet — check your chassis ground path between the engine bay and the habitation area.

Good thread this. @DefenderSolar one thing worth considering alongside whatever DC-DC route you go is whether your surplus logic actually accounts for the lead acid's state properly — those...

@CornishNomad - For a narrowboat setup, you'll want to think about your charge controller and battery voltage first, mate.