RV Lithium Battery Upgrades
Power Your Adventures Without Compromise
Upgrade to lithium and get more usable capacity, faster charging, and reliable power for everything from your fridge to your inverter, all in a lighter, longer-lasting package than lead-acid ever offered.
If you've ever run out of power halfway through a boondocking trip or watched your battery bank sag the moment you turn on the microwave, you know the limits of factory lead-acid batteries. Traditional RV batteries lose usable capacity quickly as they age, are slow to recharge, and can weigh over 60 pounds each, and have a 50% discharge floor before you risk damaging them.
Lithium iron phosphate (LiFePO4) batteries solve these problems at the source. They deliver 100% usable capacity, recharge in a fraction of the time, and handle thousands of charge cycles, usually 8-10 times more than lead-acid, with a very minimal performance drop-off. They're also roughly half the weight, which means more payload for gear, water, or passengers, and better handling on the road.
At Momentum Upfitters, we design and install lithium upgrade systems tailored to how you actually use your rig, whether that's weekend camping with a few key appliances or full off-grid living with solar, inverters, and high-draw electronics. Every installation is built around your power needs, your space, and your budget, so you get a system that just works when you need it.
The Lithium Advantage
- 2x the usable capacity in the same footprint — even a basic drop-in swap
- 3,000–5,000+ charge cycles vs. 300–500 for lead-acid
- Full power output all the way to empty — no voltage sag
- Recharges in a fraction of the time from solar, shore power, or your alternator
- Zero maintenance — no watering, no equalizing, no corrosion
- Self-heating for safe, damage-free charging below freezing
Built to Integrate. Engineered to Last.
We install lithium batteries from RichSolar, Epoch, Expion360, Victron, and BigBattery, matched to your rig, budget, and power needs.
Some RVs are lithium-ready out of the box. Others need a new converter, a DC-DC charger, or an inverter/charger swap, occasionally a solar controller too. We'll check your system and tell you exactly what's needed before work begins.
More Capacity. Zero Maintenance.
A basic group 24 swap alone roughly doubles your usable capacity — no added size or weight required.
No watering, no equalizing, no corrosion to manage. And with thousands more charge cycles than lead-acid, lithium costs less over the life of your RV.
What customers say
5.0 stars across 82 Google reviews from our two shops. Read them for Salt Lake City or Fort Collins.
“Upgraded my RV to lithium, all my questions were answered, and the job was done on time and at a good price. Very happy with the outcome, and the System is running perfectly.”
“Tyler did a great custom job on my lead acid to lithium conversion. He is thoughtful and easy to work with. I am using my new system now on a long fishing trip and everything works well.”
“Kyle is wonderful to work with. He responds promptly, gives you detailed information and estimates, then completes the work professionally. Our little trailer was tight to work in but Kyle found a way to fit in two lithium batteries. We are very satisfied with the work done and our whole experience. We highly recommend Kyle and Utah Off Grid Solar!”
Ready to Upgrade to Lithium?
If your batteries can't keep up with how you camp, a lithium upgrade gives you more usable power, faster charging, and zero maintenance.
Tell us a bit about your RV and how you use it, and we'll recommend the right lithium setup, including any converter, charger, or inverter changes needed.
Fill out the form below and we'll get back to you with options and pricing.
Typical installed lithium battery swaps start around $1,500.
Prefer to call? Salt Lake City (435) 264-0618 | Fort Collins (303) 857-5492