This is my first post. We bought a 2021 Tag XL Boondock last year. We took about a half dozen trips last summer around MI, IL and WI. The longest was 2 weeks. Loved them all and our new teardrop. All of them were at sites with no power. As a result, we decided to upgrade the battery system. I bought a Renogy 100W solar suitcase with a 20amp charger controller with a lithium setting because although we have a solar panel on our camper, it’s always in the shade. I also bought a Renogy 100AH 12 V lifepho battery along with a Victron charger with a lithium setting. Charging the new battery with the new charger seems pretty straightforward. I also understand with shore power, the battery will only charge to about 80% due to the WFCO power converter not having a lithium setting.
My concern is my 2018 Jeep Grand Cherokee’s alternator and the health of both my Jeep’s and my camper’s batteries. I have read many posts here as well as on other sites and there seem to be a lot of opinions out there. One post I read the person cut their 12V aux wire on their trailer plug. This makes some sense to me given I have the charger and solar, but I’m not sure if there are circuits on my camper that use this other than for charging the battery. I have read a lot of posts about not mixing battery chemistries…using isolators and DC to DC chargers. I’ve also read about using the battery disconnect switch to isolate the camper battery, but this approach also will mitigate the break away circuit to the brakes on my camper.
I want to protect my investment and vehicles while not over-engineering the right set up. I am looking for input on risk to my Jeep’s alternator as well as the risk to both my batteries and the most straightforward mitigation steps I need to take if at all.