Stu Cross

@FormerTeacher and @CE_Builds have both touched on the battery side which is spot on, but worth adding — what cable runs have you got between your batteries and the Multiplus?

Good shout from everyone here. One thing I'd add that hasn't come up yet — check your battery wiring and connections before you start tweaking software settings.

StuCross · 312 posts @SamWhite AGMs are particularly prone to this in cold weather — the internal resistance increases significantly as temperatures drop, which throws off the voltage-based SOC...

Hey @RM_Marine, sounds like it could be the over-voltage protection kicking in. Ford Transit alternators from that era can spike quite high under certain conditions — I've seen them push past 15V...