eBoost Scalable Energy Storage System
The eBoost is a 16kWh stackable LFP battery designed for seamless integration with the Fortress Power Envy Duo 21 inverter — delivering reliable, scalable backup and off-grid energy.
Coming Q4 of 2025!
eBoost Scalable Energy Storage System
Boost Performance. Boost Reliability.
The Fortress Power eBoost is a high-capacity, modular energy storage solution built for residential and light commercial applications. With 16kWh of usable energy per unit and the ability to scale up to 512kWh, eBoost is engineered to handle high load demands while offering the flexibility of stackable, parallel installations. Built-in heating elements, an IP65 weatherproof enclosure, and integration with the eWay wireway system allow for clean, all-weather installs.
When paired with the Envy Duo 21 inverter, the eBoost forms a fully integrated, whole-home energy storage system—ideal for backup power, energy independence, and more.
Applications
Residential
Light Commercial
Small Retail
FEATURES
PRODUCT INFORMATION
| 16kWh | 32kWh | |
| GENERAL DATA | ||
| Weight | 353 lbs (160 kg) | 706 lbs (320 kg) |
| Operating Temperature | -4 ºF – 140 ºF (-20 ºC – 60 ºC)* | |
| Ingress Protect | Degree IP65 | |
| Communication | PCS CAN/RS485; Parallel:CAN | |
| Dimensions (W*D*H) | eWay : 20.47×10.18×8.32 in (520×258.6×211.3 mm) | Battery: 20.47×10.18×33.1 in (520×258.6×840.7 mm) | |
| Warranty | 10 years (up to 15 years with Fortress Power inverter and platform) | |
| Mounting Options | Ground-Mount, Floor Standing, Wall-Hanged (Separate Accessory) | |
| BATTERY SPECIFICATIONS | ||
| Maximum Units In Parallel | 16 | |
| Cell Type | Tier-1 Prismatic 16 Cell LFP | |
| Nominal Capacity | 314Ah | 2 x 314Ah |
| Nominal Energy | 16.076KWh** | 32.152KWh** |
| Nominal Voltage | 51.2V | |
| Re-charge Voltage | 49V | |
| Cut-off Voltage | 41.6V | |
| Maximum Short-Circuit (A) | Under Testing | |
| Operating Voltage Range | 41.6-57.6V | |
| Closed-Loop Charge/Discharge | 180/250 A | 360/500 A |
| Bulk/Absorption Charge | 55.2V | |
| Max Charge/Discharge | 314A/10s | 628A/10s |
| Surge Discharge Power W | 18kW/10s | 36kW/10s |
| Cycle Life @ EOL 70% | 8000 Cycles | |
| STANDARDS & CERTIFICATIONS | ||
| Safety Standards | UL1973, ANSI/CAN/UL9540:2023, UL9640A (expected Q3 2025) | |
| Listings | CEC, LUMA, oGPE | |
| Transportation | UN38.3 | |
* Performance will degrade at operating temperatures above 104 ºF (40 ºC)
** Values are based on measurements taken at 77 ºF (25 ºC) at beginning of life.
Coming Soon
Coming Soon
VIDEO LIBRARY
Video Library Coming Soon
PRODUCT COMPATIBILITY
Fortress Power Envy Inverters
Monitor and control your eBoost ESS. Anywhere! Anytime!
✅ Monitor Performance of Each Battery
✅ Update Firmware Over The Air
✅ Participate in Virtual Power Plant Programs
