Originally Posted by jkinglet
If anyone cares, this issue was resolved with a 4-stage, 45amp Progressive Dynamics charger ("Our patented Charge WizardŽ 4-stage system constantly monitors RV batteries and automatically adjusts your converter output voltage". in place of the charger unit in the 7300 series Parallax that went belly up. A little pricey but worth it. Works like a charm. Added a pair of Optima (AGM) Blue Top Deep cycle batteries to the equation. Boondocking here I come. Add a recently serviced Honda EU2000i and it all works. Mechanic found a pair of large wood screws from nowhere (one welded to the element) that were left rattling around in the parallax charger area and shorted it out (toast).
I'm sorry it had to happen that way, but you are much better off with the new converter. It will probably pay for itself in extended battery life.
I upgraded to the same converter you did. It has done a great job for me.
I did not have an incident with the old one, but I am on my third travel trailer. I learned my lesson a couple trailers ago. I replaced the parallax the first month I had the Airstream.