As the demand for energy independence and backup power grows, more homeowners and businesses are investing in reliable energy storage solutions. Enter the eForce Stackable Energy Storage System — Fortress Power’s latest whole-home battery solution, engineered for performance in any condition.
Whether you’re installing a new solar + storage system or upgrading an existing setup, eForce delivers clean, reliable, and scalable power for grid outages, daily energy use, and off-grid living. With flexible configuration options, long-lasting durability, and a robust warranty, eForce is built to meet the demands of today’s evolving solar energy and backup power needs.
Built to Power Your World — Anytime, Anywhere
At the core of the eForce system is a 9.6 kWh lithium iron phosphate (LFP) battery — chosen for its automotive-grade performance, fast-charging capability, and 8,000+ cycle lifespan. Designed to last up to 20 years, it’s ideal for:
- Whole-home backup
- Off-grid living
- Solar self-consumption
- Light commercial or small retail operations
Each battery module can be stacked vertically with up to three units. It can also expand laterally to 268.8 kWh. This makes it a great choice for a single-family home or a small business.
Smaller Design Means Faster Installs, Lower Costs
The eForce system stands out with its streamlined, cable-free design—one of its most powerful advantages. Installers can stack batteries using quick-connect plugs, eliminating the need for wireways or long cable runs. The result: faster installs, reduced labor, and less system complexity. The eWay smart wireway simplifies integration even further, featuring built-in busbars, conduit ports, real-time LED indicators, and an emergency shutoff. To complete the system, the Envy Inverter mounts directly on top. This creates a compact, weather-resistant energy tower, delivering both clean aesthetics and reliable performance.
Built for the Toughest Conditions
Designed for all-weather durability, the eForce features an IP65-rated enclosure and integrated heating elements, making it ideal for both indoor and outdoor use. Built to perform in extreme temperatures and harsh environments, it’s a reliable solution for homeowners in hot or cold climates alike.
Code-Compliant and Aesthetically Clean
The eForce doesn’t just work smart — it looks smart too. Its modern, compact enclosure is designed to blend seamlessly into a home or facility, while staying code-compliant with NEC and NFPA standards. That means flexible placement options with minimal visual impact.
Scalable, Flexible, and Ready for the Future
Need to start small and scale later? No problem. Each eForce system is modular by design. This allows for seamless expansion as energy needs grow. Start with a basic stack and expand up to 268.8 kWh across multiple units, all while maintaining compatibility with Fortress Power’s robust monitoring app for real-time oversight and performance analytics. Even better, eForce is VPP-ready. This means customers can participate in Virtual Power Plant programs and potentially earn revenue while supporting grid stability through intelligent energy discharge.
Long-Term Peace of Mind with Industry-Leading Warranty
Your investment is protected with a 15-year standard warranty, plus an optional 30-year extended coverage — one of the longest in the industry. With Fortress Power, you don’t just get energy storage. You get confidence, performance, and long-term value.
Ready to Take Control of Your Power?
Whether you’re preparing for outages, living off-grid, or simply looking to maximize your solar investment, eForce gives you the freedom and flexibility to power your home — your way. With its advanced design and seamless integration, eForce adapts to your lifestyle and energy goals. Ready to take control of your power? Contact us today.
