Your 30A Parallax converter puts out a fairly constant 13.8v to charge the battery and power the RV. The battery however will only accept a limited current at that voltage, probably less than 10A, so the remainder is available for lights etc. Of course a defective battery can draw much more current.
The PD converter on the other hand starts at 14.4v then reduces the voltage as the battery charges. Much faster charging and easier on the battery. I replaced my Parallax with the PD 9260 and increased the battery to power panel wire size from #8 to #4 to take full advantage of the increased charging power.
Depending on the generator you bought you may want a smaller converter. The 9260 is too much for a 900 watt Honda 1000.
