Grand Design Partner Spotlight
The Future of Off-Grid RV Power is Here
Imagine powering your A/C, microwave, and other power-hungry devices completely off-grid, free from the hassle of hookups and noisy generators.
Grand Design's Solitude & Momentum models offer the exclusive Extreme Lithium Package (ELP), providing advanced power solutions with factory-installed lithium batteries and solar charging.
This means you can camp longer, explore further, and have complete peace of mind regarding power.
What Makes it Extreme?
Massive Lithium Battery Power: Enjoy 800 amp-hours of lithium battery capacity – more energy with significantly less weight than the competition!
Powerful Solar Charging: Equipped with two 50 amp MPPT solar charge controllers and 1,320 watts of American-made bifacial solar panels for rapid, direct charging from the sun.
Off-Grid Appliance Power: Run even your high-demand appliances like air conditioners completely off-grid!
Professionally Installed & Warrantied: Benefit from a factory-installed, warranty-backed system—no messy DIY modifications needed.
Intelligent Energy Management: Easily monitor and optimize your power usage from the onboard display or mobile app with our smart energy management system.
On-the-Go Charging: DC-DC charging allows you to replenish your batteries from your tow vehicle while driving.
How the Extreme Lithium Package Improves Everyday Life
Power That Lasts
Run your RV fridge for over 24 hours, or use your microwave and coffee maker without worry. Solar panels continuously recharge your lithium batteries, keeping your adventure going.
Cool Comfort, Off-Grid
Unlike traditional batteries, the Extreme Lithium Package lets you run your air conditioner for hours, even in your bedroom overnight, keeping you comfortable wherever you roam.
Smart Energy Management
The integrated battery monitoring system provides real-time usage data, putting you in control of your energy consumption.
Smart Energy Management
The integrated battery monitoring system provides real-time usage data, putting you in control of your energy consumption.
Factory Integration + Space Saving Design
Because the ELP is factory-installed by Grand Design RV on the assembly line, it meets strict quality standards and is seamlessly integrated—both electrically and mechanically.
All components are securely mounted in an aluminum tray within the front storage bay, preserving valuable space that aftermarket systems often sacrifice.
The ELP lowers smoothly on gas struts for easy, tool-free access to all components. Below, two 400Ah lithium batteries are securely nested—while still leaving room to expand the battery bank if desired.
The Power Behind the Package
Future Solutions Bifacial Solar Panels
With its unique transparent design, our cutting-edge innovation delivers a remarkable surge in performance when compared to conventional monofacial panels. Made with an aluminum frame and high-efficiency solar cells that guarantee exceptional performance.
Four 330W Bifacial Solar Panels are included in the Extreme Lithium Package for a total of 1,320W.
Future Solutions Solar Controllers
The Future Solutions SF100-50 is a 100V, 50A solar charge controller that uses advanced MPPT technology to rapidly track the maximum power point of your solar array—delivering efficient, real-time energy capture and optimal battery charging. Its slim design and fan-cooled housing make it ideal for the Extreme Lithium Package.
Two 50A Solar Controllers are included in the Extreme Lithium Package.
TBB Inverter Chargers
The TBB CM3.0L Inverter Charger—a compact, all-in-one solution that delivers true sine wave power, adaptive battery charging, and hybrid technology for efficient, reliable performance. It ensures smooth operation of even the most sensitive or demanding devices, from air conditioners to outdoor kitchens.
Built for mobile life, the CM3.0L features Automatic Energy Allocation (AEA) to prevent overloads and prioritize essential appliances. It also offers quiet, thermal-controlled cooling and fully programmable settings, making it as smart as it is powerful.
Two 3,000W Inverter Chargers are included in the Extreme Lithium Package.
TBB Lithium Batteries
The TBB M12 Series 400Ah lithium battery delivers 5.12kWh of energy in a compact, 94-pound form—ideal for tight installation spaces.
With support for up to 8 batteries in parallel, it offers an impressive 3,200Ah capacity, making it a top-tier solution for the Extreme Lithium Package.
Engineered for performance and protection, the M12 features a built-in BMS with automatic cell balancing, high-precision SOC monitoring, and a heater for charging in temps as low as -30°C. It supports Bluetooth communication, offers remote switch functionality, and is certified to meet UL standards.
Two 400Ah Lithium Batteries are included in the Extreme Lithium Package for a total of 800Ah.
TBB DC-DC Battery Charger
The DM1260 DC-DC Battery Charger is engineered to safely pull power directly from your tow vehicle’s alternator, delivering fast, efficient charging to your ELP battery bank while the engine is running. With a sleek, non-isolated design and up to 96% efficiency, it ensures you get the most from every drive.
Smart and reliable, the DM1260 features built-in temperature compensation for optimized charging in any climate. It also includes robust protection against over-voltage, over-current, short circuits, and extreme temperatures—making it a safe, dependable solution for keeping your lithium batteries ready for the next adventure!
One 60A DC-DC Battery Charger is included in the Extreme Lithium Package.
TBB Touch Display
The C4 Touch Display from TBB puts complete control of your power system at your fingertips with a sleek, responsive touchscreen and intuitive menu navigation. Easily access real-time data and adjust settings with just a few taps, making power management seamless and straightforward.
Paired with a Bluetooth-connected mobile app, it extends monitoring and control beyond the wall, offering a flexible, user-friendly experience tailored to your setup.
One Touch Display is included in the Extreme Lithium Package.
Watch Our ELP Deep Dive
In this video, Jeff from Grand Design and Dave from Future Solutions introduce the Extreme Lithium & Solar Package, now available on select Solitude and Momentum models. They explore how this advanced system empowers RVers to enjoy extended off-grid adventures with confidence and convenience.
Key Highlights
Comprehensive Power Solution
Integrates high-capacity lithium batteries, solar panels, and inverters to deliver reliable, off-grid energy for all onboard systems.Advanced Battery Management
Features a built-in Battery Management System (BMS) that ensures safe operation by monitoring temperature, charge levels, and battery health.Full Appliance Support
Provides enough power to run major appliances—including air conditioning—without the need for shore power.Intuitive Monitoring Tools
Includes a touchscreen interface and mobile app for real-time insights and control over energy usage and system performance.Designed for Freedom
Engineered to support longer stays in remote locations, giving RVers more flexibility and independence.