intermittent converter problems

[John Canfield]

Very good, I always like to go for the low hanging fruit myself when troubleshooting. Let us know in a few days if your problem has disappeared for good.

 

[John Hilley]

When the batteries were tested were they given a full charge first? The chassis battery shouldn't have affected the converter/charger output unless you had a Trik-L-Start or equivalent connecting the batteries together.

Did you do a no load test of  the converter/charger with the batteries disconnected?

The change in voltage may just be a combination of fully charged batteries and cleaned connections. That converteer/charger output is still low.