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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Whole-home backup power
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Off-grid homes and cabins
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Light Commercial Use
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DIY solar setups
Introduction to the Fortress Power eForce Stackable Whole-Home Energy Storage System
eForce 9.6kWh LFP Battery / Key Benefits
Energy Freedom, Power for All Conditions
🛡️ Extended Warranty Coverage
Backed by a standard 15-year industry-leading warranty, with an optional 30-year extension available — offering unmatched long-term value and peace of mind.
📦 Lower System Costs, Fewer Components
eWay integrates busbars, conduit ports, and an emergency shutoff into one hub, reducing components and installation time. The Envy Inverter mounts directly to the eWay, forming a streamlined, weather-resistant (IP65) energy tower.
✅ Modular, Cable-Free Design
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 268.8 kWh.
🌦️ Built-In Heater & All-Weather Protection
Maintains optimal battery performance in cold climates. With IP65 rating, eForce operates safely and reliably indoors or outdoors, year-round.
🛡️ Sleek and Code-Compliant Installation
Modular, stackable design with quick-plug technology allows for fast and simple setup, while providing a clean, professional installation that meets NEC and NFPA standards, designed to suit modern homes with elegance.
↗️ Flexible and Scalable Energy for Growing Needs
Easily expand your system vertically or laterally to match your growing energy needs.
💵 Earning Money Through Grid Participation
Take part in Virtue Power Plant programs to earn revenue and support grid reliability with intelligent energy discharge.
eForce Feature Videos
See what eForce can do
eForce Installation Videos
Step-by-step setup guide
eForce Influencer Videos
Hear what influencers think
eForce Real World Installations
Explore real-world installations where the eForce stackable battery powers homes, cabins, and small businesses.
📍 Massachusetts, USA
🏠 Installation Type:
Custom Off-Grid Remote Island Home
⚡ System Specs:
8kW / 19.2 kWh
📍 Colorado, USA
🏠 Installation Type:
Residential home
⚡ System Specs:
12kW/19.2 kWh
📍Texas, USA (DIY)
🏠 Installation Type:
Off-Grid Container
⚡ System Specs:
8kW/19.2 kWh
📍 Hawaii- (Commercial)
🏠 Installation Type:
Girl Scouts of America, Camp Paumalu
⚡ System Specs:
36kW/86.4kWh
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 | ||||
