Upgrade Converter

+1 on staying with the 55A converter. If you are considering changing to an LiFePO4 battery, WFCO offers a drop-in replacement converter that is 50A suitable for LiFePO4 batteries but not for Pb-Acid batteries. However, that would make necessary other changes as you can see in my mods.

As for Progressive Dynamics, they are more expensive and while they are good, they too can fail as I have read in some of the reviews. I think WFCO got a bad batch of converters. I had one fail, but after replacing that, the replacement was still going strong until I replaced it with the LiFePO4 capable converter, which is working very well. When I was at the Kentucky  Mini-Mini a couple of years ago, I found from Dave Hickey who was working on them who did a write-up on Facebook in the RPod Owner's Group there) that one of the causes was that the grounding screws were not making good contact, eventually would cause a cold-soldered contact point to fail. Re-soldering this connection and making sure the screws attaching the circuit board to the mount are tight seemed to be a way to prevent this from happening. Here is a link to that article:

Yep...all the above plus, if you were to upgrade, the new converter might cause your 30 amp supply breaker to trip IF you were trying to power the microwave and/or A/C and/or electric water heater element while that large converter is pulling a lot of amperage also.

You really need to figure out what is wrong, rather than chase this with expensive upgrades that may or may not fix the problem, or might even make it worse.