Originally Posted by GTSeattle
Thanks for your information. We have a Midwest Designs Passage on a 24 foot Sprinter chassis, along with the same Zantrex inverter/charger and Zampf Solar panel and controller you have. We struggle because the Zampf solar panel often reports the "battery" fully charged but the house system gauge and the inverter indicator show the battery at less than 20%. Often, even though it is very sunny and very small loads have been run, the house power will fail even though the Zampf Solar says full. Were you able to learn if Midwest wired the solar to the chassis battery instead of the house battery?
I have gotten no more information. But I have complained to the dealer, stating that I consider this a warranty issue. I would accept an A/B switch or 3 pole switch solution so at least I could manually switch to charging the house battery. Someone, possibly Mike Mas, said they had added such a 3 pole switch, but I never got any detailed information on how they did it.
Last I talked to the dealer, they said they can't even get a wiring diagram from MidWest. :-( I really want a wiring diagram, and a plumbing diagram, with location and access information.
Also, IMO, the on-demand hot water heater in this rig is terrible. It wastes an enormous about of water (into the grey tank) before it gets hot... then it gets and E6 error (pressure switch fault). I did figure\ out how to make it marginally useful for showering, by dialing the temperature back to 105 degrees (and showing with all "hot" water). This is really only good, when one has full hookups, given the amount of water it wastes. I'm going to ask the dealer about installing a hot water tank with re-circulation, so that when its on, it instantly delivers hot water.