Fortress Power eForce Stackable 9.6kWh LFP Battery
The eForce Stackable Energy Storage System is Fortress Power’s most advanced and scalable solution for whole-home backup, off-grid living, and solar self-consumption. Each 9.6 kWh lithium iron phosphate (LFP) battery is designed for long-lasting performance with 8,000 cycles and a 20-year design life, making it ideal for residential and light commercial applications.
Engineered for flexibility, eForce modules can be stacked vertically (up to 3 modules) using wireless quick-connect plugs — no cables required — or expanded laterally for systems up to 153 kWh. Each stack integrates with the eWay, a smart wireway featuring built-in busbars, conduit ports, an emergency shutoff, and real-time LED status indicators. The Envy Inverter (sold separately) mounts directly to the eWay, forming a streamlined, weather-resistant (IP65) energy tower. This modular architecture enables effortless installation, seamless AC/DC coupling, and full compatibility with Fortress Power’s monitoring app.
Whether you’re building a new solar + storage system or upgrading an existing one, the eForce delivers clean, reliable power and unmatched scalability — all backed by an industry-leading warranty for long-term confidence and protection.
Applications
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Off-grid homes and cabins
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Home backup power
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Light commercial energy systems
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DIY solar setups
eForce 9.6kWh LFP Battery Features
Energy Freedom, Power for All Conditions
🔋 Top-Tier Automotive-Grade Cells
Built with premium lithium iron phosphate (LFP) cells rated for 8,000+ cycles and fast-charging capability without compromising performance or longevity.
📦 Lower System Costs, Fewer Components
The integrated design eliminates the need for wireways, long cable runs, and additional enclosures, significantly reducing total system cost and installation complexity.
✅ Fast, Stackable Installation
Featuring quick-plug technology and a modular stackable form, the eForce system allows for rapid installation with reduced labor and fewer wiring errors.
🛡️ Extended Warranty Coverage
Backed by a standard 10-year industry-leading warranty, with an optional 30-year extension available — offering unmatched long-term value and peace of mind.
🌦️ All-Weather Durability
With an IP65 rating and built-in heating elements, eForce is engineered to perform in extreme temperatures and weather conditions, indoors or out.
🛡️ Clean, Code-Compliant Design
The streamlined enclosure supports a clean aesthetic and meets NEC and NFPA standards — enabling flexible installation with minimal visual and space impact.
↗️ Effortless Scalability
Scale your system vertically up to 28.8 kWh per stack or expand laterally up to 268.8 kWh total, adapting to evolving residential or commercial energy needs.
💵 VPP-Ready for Grid Incentives
Approved for Virtual Power Plant (VPP) programs nationwide, enabling customers to earn revenue and support grid reliability with intelligent energy discharge.
eForce 9.6kWh LFP Battery Technical Specs & Downloads
Get the details you need—spec sheets, manuals, and performance data all in one place. We link directly to the manufacturer's site, so you know you always have the most up-to-date information.
| 9.6 kWh | 19.2 kWh vertical | 19.2 kWh horizontal | 28.8 kWh vertical | 28.8 kWh horizontal | |
| Battery Parameters | |||||
| Maximum Units In Parallel | 16 | 8/16 | 5/16 | ||
| Cell Type | Tier-1 Prismatic 15 Cell LF | ||||
| Nominal Capacity | 200Ah | 2*200Ah | 3*200Ah | ||
| Nominal Energy | 9.6KWh | 19.2KWh | 28.8KWh | ||
| Operating Voltage Range | 39~54V | 39~54V | 39~54V | ||
| Nominal Charge/Discharge (A) | 120/160 | 240/250 | 240/320 | 250/250 | 360/480 |
| Open Loop Charge/Discharge (A) | 100/100 | 100/100 | 200/200 | 100/100 | 300/300 |
| Bulk Absorption Charge (V) | 51.5V | ||||
| Open Loop/Closed Loop (V) | 51.5V | ||||
| Max Charge/Discharge (A) | 195/195 | 250/250 | 390/390 | 250/250 | 585/585 |
| Surge Discharge Power W (10s) | 14,400 | 14,400 | 28,800 | 14,400 | 43,200 |
| Cycle Life @ EOL 70% | 8000 | ||||
| General Data | |||||
| Ambient Temperature Range | -4-140°F (-20-60°C) | ||||
| Ingress Protect Degree | IP65 | ||||
| Communication | RS485/Wi-Fi/CAN | ||||
| Weight | 249 Ibs (112.9 kg) | 465 Ibs (210.9 kg) | 681 Ibs (308.9 kg) | ||
| Dimension (W*D*H) (mm) | 24.4x9.4x33.5 in (620x240x851 mm) | 24.4x9.4x53.1 in (620x240x1351 mm) | 24.4x9.4x72.9 in (620x240x1851 mm) | ||
| Warranty | 10 years | ||||
| Standard & Certification | |||||
| Safety Standard | UL1741, UL1973, UL9540/A DC ESS | ||||
| EMC | IEEE1547, FCC, SDOC | ||||
| Grid Standards | IEEE1547 | ||||
| Transportation | UN38.3 | ||||
Introduction to the Fortress Power eForce Stackable Whole-Home Energy Storage System
