so this started because I gave away my first DIY build (280amp) to a good friend, because I also wanted to upgrade the 5th wheel but standardize the batteries between the 5th and truck camper so I ca...
I did a lifepo4 conversion on our Newmar class A as well. Took over a year, and still tweaking it, but it’s been amazing what lithium batteries allow us to do.
I ended up also having to tear out and completely rebuild the battery compartment from scratch. Replaced the 6 6 volt gc2 batteries that came from factory with 4 300 amp hour epoch essentials. Wired it using bus bars, two Victron DC DC chargers for charging, smart shunt, multiplus 3000 120x2 inverter/charger, and cerbo GX for monitoring. It is soo cool being able to run literally everything off batteries and camp off grid for several days at a time when we want. The monitoring Victron allows with their VRM portal online is amazing, too. Ended up buying an Amazon fire tablet, installing cerbo GX software on it and using it as a dedicated cerbo gx monitor.
Next step is to add solar panels on roof, although not sure if we will. Very happy with the rig as it is. We can run everything off batteries and be off grid for several days easily. can even run one air conditioner off batteries for about 7 or 8 hours before we have to crank up genny or plug in to shore power to recharge.
Here are some pictures:
battery compartment:
Here’s what it looked like without batteries in it (this was before I added the cutoff switch):
wiring diagram i made illustrating all of it:
cerbo display tablet over door:
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RV projects you can tackle on your own with a few friendly pointers.4,415 PostsLatest Activity: Aug 04, 2026