Originally Posted by lewster
. . .
The newer converters (even the OEM Parallax battery burner) can be used with no battery in the DC circuit, . . .
Could you please offer your best guess on why the original poster's batteries went dry after a 10-day camping trip, connected to shore power, in a new Airstream? The use of the OEM converter/charger surely is not the sole
cause, by itself, is it?
I know you recommend upgrading this single-stage charging unit, but if used correctly, it would not fry batteries in 10 days would it? If the trailer was in active use (12-volt devices), a healthy OEM charger should have performed fine IMO.
Bad batteries? Bad converter/.charger? Incorrect dealer charging/prep before purchase, like low water, or letting batteries discharge completely?
Again, I do understand that upgrading the converter/charger is a good goal, and your expertise is appreciated, but there should be a more nuanced explanation here IMO.