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.

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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

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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

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