I'll add to this thread. The WFCO in our TT died last summer at the young age of 3 years old (sniff, sniff). :( It was overheating and we could smell burning plastic. Then the breaker tripped.
Something never seemed right with the standard FLA Lifeline battery (one only) from the day we bought the TT new. Didn't seem to hold a charge very long like after it was into the dealer for 2-3 days and I'd go to pick it up and the battery would be dead. When the converter died we took the battery to a shop who did a load test and found one dead cell. Couldn't figure out if the battery lead to a converter failure or vice versa. Battery was checked periodically for fluid level and wasn't a factor.
So when the converter died we replaced it with a Progressive Dynamics unit designed to fit into the WFCO. Also replaced the battery with a Trojan AGM at the same time. Problem was, we were a couple thousand miles from home on a road trip (couldn't it have failed at home?). Phoned Randy at Best Converter and he had it fast shipped to the next CG on our route and sure enough, there it was waiting at the office when we arrived. I used a battery tender we had to keep the new AGM going until we got the new converter.
I've read about Best Converter's outstanding service for years so it was a no-brainer to use them. Below is a photo of the old WFCO converter beside the new Progressive Dynamics one. At first I didn't think it'd fit but it did. It's clearly a much better converter. It's quite a bit larger overall and has a BIG heat sink, 2 fans and larger components on the board and it's very quiet. Plus it's made in the US! I've read many reports of WFCO problems for years as well and until you have one fail on you, you sorta don't pay much attention to the stories. The RV industry keeps on installing these cheap @#$% things anyway because the price is right. :M
One year later, the battery and converter are working great. I can now leave it hooked up all winter with no worries about damaging the battery.
