House Battery Problems...
Our new-to-us 2001 Coachmen Leprechaun has an electrical issue that has me stumped. The house battery and converter that it came with where not producing adequate voltage and an RV tech that was w...
Forum Discussion
As StirCrazy posts from the Powermax manual you should be getting 14.6v from the converter with the all the positive wires on the batteries disconnected. Test it right at the converter first to verify what you have. You can also use an extension cord from your garage to the converter to remove any and all doubts about the RV causing an issue.
I love being able to post when I have basically the same equipment. I have a Powermax PM3-45 vs your Powermax PM3-55 but the mechanics are the same. Here's a picture from my Powermax that I just took for this post. If you're not getting ~14.6v like this then you have a problem with the converter.
I have the 35amp version and there is an adjustment for the voltage, so if it's putting out 12.6v, it might just have gotten reduced.
