Homepage - ABC Upfitters

Slide

EXPLORE

WITH NO LIMITS

The Ultimate Off Grid Power Experience

ABC Upfitters provides PREMIUM upfitting services to RV customers who are looking for the ultimate off-grid power experience. By using Mastervolt components, ABC can provide an UNMATCHED level of integration and quality.

Graphic that says ABC Upfitters is "teaming with owl vans"

What Do You Camp In?

Travel Trailer

More Info

Van

More Info

5th Wheel

More Info

Motorized Class A

More Info

Motorized Class C

More Info

Lighting

More Info

WHAT OUR CUSTOMERS ARE SAYING

We would highly recommend ABC Upfitters. We own a Thor Tranquility 19L and wanted to add more battery (from 400ah to 800ah) and made a trip to Elkhart while we were visiting family in Michigan. Their team accommodated our tight time frame very well and the cost was in line with our expectations. Communication throughout was responsive and professional. Pre and post work walk throughs explained some of the problems we were having and how they would be resolved, as well as the inner workings of our electrical system. Now we have ample battery for our off-grid mountain bike trips.

– Cassandra M.

I rarely get impressed with customer service nowadays, but you guys are the bar that others should measure themselves against. I appreciate you and hopefully, one day, I can return the kindness you have shown.

– Roy M.

A big thank you to ABC Upfitters. We traded in our 400ah battery and they installed two 460ah batteries. This will be very beneficial during the summer in Texas. We turned the AC on high, with lights and the fridge running, and we had over 10hrs of battery life!! They even cleaned up some lose connections and made a few other repairs for us as well. They are a great, “down to earth” team and very easy to work with. I highly recommend them if you’re looking to do a battery upgrade

– Justin B.

Connect with ABC Upfitters

YouTube

We recently completed a major electrical upgrade on this Thor Sprinter 19P, turning it into a true off-grid powerhouse.

This build now features 920Ah of Mastervolt lithium battery capacity, giving the owner double the usable energy for extended boondocking and everyday comfort. To support that capacity, we added a 250A secondary alternator, providing fast, reliable charging while driving.

All system connections are cleanly organized on a dedicated component board inside the van, making the system easier to service, troubleshoot, and expand in the future. Solar charging is handled by a 25A Mastervolt solar controller, rounding out a well-balanced, integrated Mastervolt power system.

At ABC Upfitters, we specialize in turnkey electrical upgrades that prioritize reliability, serviceability, and real-world performance.

If you’re considering a battery or alternator upgrade for your Thor Class B RV, this is a great example of what’s possible.

🌐 Learn more: https://www.abcupfitters.com

📞 Call us: 574-333-3225

📍 Installed by ABC Upfitters
🔋 Mastervolt Lithium Systems
🚐 Built for serious off-grid travel

Don’t forget to like, subscribe, and reach out if you have questions about upgrading your own rig.

24 10

YouTube Video VVVTZW9RcTBzdHl4bzR1OEhOV2NrOGxBLkZtY1UySVh6dHRZ

Thor Sanctuary/Tranquility 19p – ABC Upfitters Jacked-up Package Walkthrough

ABC Upfitters December 17, 2025 12:51 pm

This rig features a fully integrated Mastervolt system with a massive 24kWh lithium battery bank, dual 3500W inverters, dual 200A chargers, 2660W of solar, and dual 50A DC-DC chargers. If you’re researching RV lithium upgrades, solar RV systems, or off-grid power solutions, this build shows what a true high-end system can do.

Interested in upgrading your RV power system?
We design and install turn-key 12/24/48v Mastervolt off-grid systems at our shop in Elkhart, Indiana.

📍 Elkhart, IN
📞 574-333-3225
🌐 www.abcupfitters.com

19 3

YouTube Video VVVTZW9RcTBzdHl4bzR1OEhOV2NrOGxBLjRWUDdQa1ZWMjRZ

We Went ALL-IN: 24kWh Battery Bank + 7k Inverter | Off-Grid Beast Mode

ABC Upfitters December 5, 2025 3:41 pm

⚡ Thor Sanctuary & Tranquility Lithium Upgrade | 920Ah Off-Grid Power ⚡
This Thor Sanctuary/Tranquility Class B RV now has a 920Ah lithium battery bank with a Mastervolt off-grid system. ABC Upfitters specializes in RV lithium battery upgrades for vans, trailers, motorhomes & overlanding rigs—so you can power your adventures without plugging in.

📞 Call: 574-333-3225
🌐 Website: abcupfitters.com

📲 Follow us: https://www.facebook.com/ABCUpfitters/
| https://www.instagram.com/abc_upfitters/

#ThorSanctuary #ThorTranquility #LithiumBatteryUpgrade #RVUpgrades #OffGridPower

ABC Upfitters can take your Mastervolt system to the next level by doubling the battery capacity in your **Thor Sanctuary or Tranquility (19P/19L/19PT/19LT)**. This van now boasts a **920Ah lithium battery bank**, giving it more off-grid power than ever before.

But we don’t stop at vans—we install **full off-grid power systems** in **Travel Trailers, 5th Wheels, Class A & C motorhomes, Overlanding rigs, and more**. If you want to power your adventures **without plugging in**, we’ve got you covered.

**Need help? Let's talk.**
We’re fun. We don’t take things too seriously… **except your electrical system. That’s serious business.**

📞 **Call:** 574-333-3225
🌐 **Website:** [www.abcupfitters.com](https://www.abcupfitters.com)

🔧 **Helpful Resources:** [Click here](https://www.abcupfitters.com/resources/)

📲 **See Our Work on Social Media:**
🔵 [Facebook](https://www.facebook.com/ABCUpfitters)
📸 [Instagram](https://www.instagram.com/abc_upfitters/)

#OffGridPower #VanLife #ThorSanctuary #ThorTranquility #RVUpgrades #Mastervolt #LithiumBattery #Boondocking #boondockbeast

11 4

YouTube Video VVVTZW9RcTBzdHl4bzR1OEhOV2NrOGxBLmhHaXB1RzBCZl8w

Thor Sanctuary & Tranquility Lithium Upgrade | 920Ah RV Off-Grid Power System

ABC Upfitters February 7, 2025 2:37 pm