There are so many ways to go about doing this. I chose to go with 2x 100AH Battleborn Lithium batteries 100 Ah 12V LiFePO4 Deep Cycle Battery | Battle Born Batteries which should provide enough power for our needs. We mated these batteries with a 2000W Aims Pure Sine Inverter/Charger w/ Transfer Switch (2000 Watt Pure Sine Inverter Charger with transfer switch (aimscorp.net)). This unit is pretty neat since it allows for up to a 30A connection to 120V source to charger your batteries OR run appliances in your van. Perfect for staying at RV parks! It has enough power to run our Bosch 4 Gallon 120V hot water tank (Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted – – Amazon.com).
I added a 30A port at the rear driver’s D-pllar area to allow for a 30A connection to enter the vehicle. (https://www.amazon.com/gp/product/B085HFBLDN) (UPDATE: 8/2022 – Moved this connection due to water intrusion – Check the update)
Also added a Renogy 40A DC-DC charger to charge the house batteries while driving around (12V DC-DC On-Board Battery Charger | Renogy Solar).
The system comprises an AC/DC fuse panel (https://www.amazon.com/gp/product/B06WP5JPWQ) which houses breakers for the 120v wires ran through the van (for 1 power outlet and 1 switched outlet for the hot water tank) and fuses for various 12v systems including:
There are a lot more details regarding the battery connections, wiring, fuses, etc.. I good resource I found was EXPLORIST.life – DIY Campers This guy has some great tutorials/videos on making these connections as well as using busbars: How to Wire a Busbar in a Camper Van – EXPLORIST.life
