This is the eForce 19.2kWh system from Fortress Power: two 9.6kWh LiFePO4 battery modules wired together to form a 48-volt, 400 amp home energy storage bank. It is built for homeowners and installers who need modular, stackable backup power that can scale up as needs grow.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Why This Configuration Matters
Chemistry is Lithium Iron Phosphate (LiFePO4), a stable, long-cycle-life chemistry commonly used in fixed, stationary storage. This eForce 19.2kWh kit is built from two 9.6kWh modules, connected via Wireless Quick Plugs, forming a stackable, modular tower that pairs with the eWay wireway and compatible Fortress Power inverters. Fortress Power states 8,000+ cycle life with fast-charging capability and no reported cell degradation from that fast charging, according to manufacturer data.
Battery Characteristics
- Chemistry: LiFePO4 (Lithium Iron Phosphate)
- Design: Modular, stackable 9.6kWh battery modules
- Enclosure: All-weather, outdoor-rated enclosure with built-in temperature-controlled heating
- Indicators: Real-time status LEDs for system information
- Cell configuration: 15-cell configuration (eForce-specific; differs from eVault MAX, eFlex MAX, and eBoost, which use 16 cells)
Wiring & Configuration Limits (Series/Parallel)
This kit contains two 9.6kWh modules combined to deliver 19.2kWh at 48V. Manufacturer data confirms the eForce system is modular and stackable, with up to 16 batteries supported to form a 153kWh system. Manufacturer source data does not specify the exact series/parallel wiring topology, per-module Ah rating, or the maximum number of modules addressable per single inverter connection.
[NEEDS VERIFICATION]: Exact series vs. parallel wiring configuration between modules within this kit, and any inverter-specific module limits, are not stated in the provided manufacturer data. Confirm with Fortress Power documentation or your installer before final system design.
Pro-Installer Tip
Stacking multiple battery modules into one bank without matching firmware versions and charge states across modules is a common cause of imbalance in modular LiFePO4 towers. Mismatched modules can cause one module's BMS to reach its limits before the others, throttling the whole bank's usable capacity or triggering a lockout. Before commissioning a multi-module eForce system, verify each module reports the same state of charge and firmware revision using the system's own monitoring LEDs or a compatible monitoring platform, and confirm balanced voltage across modules before connecting to the eWay. LiFePO4 systems like this one are typically designed for deep discharge, but always operate within the depth-of-discharge limits stated in the manufacturer's Resources tab for this system rather than a generic lead-acid 50% DoD assumption.
Key Benefits
- 8,000+ cycle life per manufacturer data, supporting long-term daily cycling
- Modular design lets you scale from a single 9.6kWh module up to a 153kWh system (up to 16 batteries)
- All-weather enclosure with built-in temperature-controlled heating for outdoor installation
- Wireless Quick Plug connections between modules simplify capacity expansion
- Virtual Power Plant (VPP) support in eligible areas, allowing potential revenue generation from the system
- Real-time LED status indicators for at-a-glance system monitoring
Technical Table
| Spec | Value |
|---|---|
| Voltage | 48V |
| Amp Rating | 400 Amp |
| Total Capacity | 19.2kWh |
| Module Capacity | 9.6kWh per module |
| Chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Cycle Life | 8,000+ cycles |
| Max Expandable System Size | Up to 16 batteries / 153kWh |
| Cell Configuration | 15-cell (eForce) |
| Enclosure Rating | All-weather, outdoor rated with built-in heating |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
This kit is designed to integrate with the Fortress Power eWay wireway system, which includes built-in busbars, conduit ports, and an emergency switch. The Fortress Power Envy True 12kW inverter is designed to bolt directly onto the eWay for a combined storage tower. Modules connect to each other via Wireless Quick Plugs.
NOT confirmed compatible: Manufacturer data provided does not confirm compatibility with third-party inverters, non-Fortress Power monitoring hardware, or earlier-generation Fortress Power battery lines (eVault MAX, eFlex MAX, eBoost), which use a different 16-cell configuration than the eForce's 15-cell design. Do not assume interchangeability between eForce modules and other Fortress Power battery product lines without manufacturer confirmation.
This is a stationary home/off-grid storage battery. It is NOT designed as a starter battery, and is NOT intended for marine or golf cart applications.
FAQ
Is the SOLARMAN app owned or operated by Fortress Power?
No. SOLARMAN is a third-party monitoring platform that is not owned or operated by Fortress Power. It is used specifically for monitoring and managing the Solo 6.5K inverter.
What chemistry does the eForce battery use?
The eForce battery uses LiFePO4 (Lithium Iron Phosphate) chemistry, in a 15-cell configuration per module.
How large can an eForce system be expanded?
Per manufacturer data, up to 16 batteries can be combined to form a system as large as 153kWh.
Can eForce modules be mixed with eVault MAX, eFlex MAX, or eBoost batteries?
Manufacturer data notes that eVault MAX, eFlex MAX, and eBoost batteries use a 16-cell configuration, while the eForce battery uses a 15-cell configuration. This distinction is called out specifically in Fortress Power's own documentation; treat these product lines as distinct and do not mix without manufacturer confirmation.
Warranty & Support
Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's warranty terms, data sheets, and installation manuals for this system. If you have questions about whether this kit fits your planned installation, ask us before you order. We always reply back.
