This fall, Fortress Power is expanding our 48V lineup with three powerful new products designed to deliver smarter, more reliable energy storage solutions for homes and businesses. We’re thrilled to announce the eBoost Scalable Energy Storage System, the Envy Duo 21 Inverter, and the Solo 6.5K Inverter—each engineered to maximize performance, flexibility, and efficiency.
You can be among the first to see them at RE+ 2025 in Las Vegas, September 8–11 at the Venetian Expo & Caesars Forum. Visit us at Booth V6436 to explore the future of residential and commercial energy storage.
eBoost Scalable Energy Storage System
Boost Performance. Boost Reliability.
The Fortress Power eBoost is a 16kWh stackable LFP battery engineered for seamless integration with the Envy Duo 21 inverter. Built for reliability and scalability, it’s the ultimate solution for whole-home backup and off-grid applications. Product highlights include:
- 16kWh capacity per module – ideal for higher load demands
- Scalable to 256kWh – connect up to 16 units in parallel
- Integrated eWay Wireway system – clean, code-compliant installs
- All-weather durability – IP65-rated with internal heating elements
- Whole-home compatibility – pairs with the Envy Duo 21 inverter
- Quick scale and deploy – modular design reduces install time
Whether you’re designing for residential, light commercial, or small retail use, the eBoost delivers dependable, long-lasting energy storage with quick scalability and easy deployment.
Envy Duo 21 Inverter
Maximum Power. Dual-Purpose Design.
The Envy Duo 21 is a 48V hybrid inverter that takes system flexibility to new levels. With 25kW PV input, dual-phase support (240V split-phase / 208V three-phase), and parallel scalability up to 120kW, it’s the perfect solution for high-performance residential and light commercial installations. Key features include:
- Up to 25kW PV input capacity
- 12kW continuous / 16kW peak output
- Parallel up to 10 units for 120kW total power
- Built-in AC/DC breakers and rapid shutdown transmitter
- Remote monitoring and firmware updates via Fortress Power mobile app
- Minimum of two or more inverters required for 208V three-phase operation.
When paired with Fortress Power batteries like the eBoost, the Envy Duo 21 ensures seamless whole-home energy management.
Solo 6.5K Inverter
Reliable, Flexible Power for Non-Export Applications
Designed for backup power, off-grid living, and grid-tied solar systems, the Solo 6.5K is a compact yet powerful hybrid inverter with 6.5kW output and a built-in 140A solar charge controller. With parallel support for up to six units, it can scale to 39kW total output, making it ideal for everything from cabins to microgrids.
- 140A solar charge controller – efficient, high-capacity charging
- Grid and generator input with intelligent switching
- Time-of-use scheduling for lower utility bills
- Optional CT monitoring for added safety and precision
- Parallel up to 6 units for 39kW total output
- Versatile application support for backup, off-grid, and smart load control
Whether you’re powering a remote property or boosting resilience in a grid-tied home, the Solo 6.5K provides dependable, flexible energy when and where you need it.
See the Future of Energy Storage at Re+ Vegas 2025
Be among the first to explore these three game-changing solutions at RE+ 2025, the largest clean energy event in North America.
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Level Two, Booth V6436 – Venetian Expo & Caesars, Las Vegas
September 8–11, 2025
Exclusive RE+ Preview Webinar
Can’t make it to Las Vegas, or want insider access before the show? Join Fortress Power CEO Jing Yu on September 3rd at 3 PM EDT for a live RE+ Preview webinar. Register today to get an inside look at:
- Our in-booth live training schedule
- New product launches debuting in Vegas
- The team members you’ll meet at the show
Looking to connect with us at the show? Visit our Contact Us page to schedule time with one of our sales representatives and learn how Fortress Power can power your next project.
