Sorry Host couldn't help more. I fixed my problem (I think) tonight replacing the Zamp solar controller. My part came from Battery Systems on Bluebell off Coffey Lane. You might remember it as the old interstate battery place. They were very helpful and pretty knowledgeable. For me, they are now my first choice for 12 volt systems.
The local mobile rv tech guy passed away a couple years and I used him with some recall stuff. Not sure who took over the business. You can pm me with any questions. Again, welcome to the forum. We have met and now camp on the Sonoma Coast with fellow members. There is a lot of info out there and it's helped me plenty.