The aux battery system was losing charge in full sun when it was disconnected from the alternator. I looked at the D250 sa to notice the solar was not working, this video explains why.
alf3553 not that I know, I have 2 of the panels and this is the 1st prob I have had in....i want to say 3 yrs, I picked 3 diodes up, 1 as a back up and 1 each for each panel, I will replace the other panels if and when it fails