New battery voltage 12.2V

[t0mb0]

loose terminal connection. tightened and MPPT immediately went into bulk mode charging and voltage shot to 14.2v

Winner. This kind of thing is almost always a dodgy connection/contact somewhere.

 

[dcpen43]

Winner. This kind of thing is almost always a dodgy connection/contact somewhere.

yes vibration over time and things work loose

 

[dcpen43]

We like an easy no cost fix

trouble is they are few and far between, everything else is all about the money