Okay, for the latest. I contacted an installer recommended by the battery company. He told me since my motorhome was so new I may already have a DC to DC converter in it and he suggested a contact the motorhome builder to see. So I contacted my motorhome builder to see if they had already installed a DC to DC converter and told them what I was trying to do. This is their reply to me:
Mark,
A DC / DC regulator / converter is unnecessary to use lithium ion batteries on the house side, our BIRD (bi-directional relay/ delay ) already serves that purpose. There should not be any modifications necessary to use lithium ion batteries on the house side.
So I called the tech at the Battery Manufacturer and told them about this BIRD thing, and they disagree that it will replace the the DC to DC converter. So now I have no idea what to do! Any ideas? I do have an appointment to meet with the installer on Thursday and I’ll see what he has to say.