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.
Higher Capacity Per Module- Delivers 16kWh of energy storage per unit-ideal for homes or businesses with higher load profiles or limited install space.
Expandable to 512kWh- Easily scale your system by connecting up to 16 units in parallel, giving you the flexibility to grow as your energy needs evolve.
Integrated eWay Wireway System- Built-in busbars, conduit ports, LED indicators, and an emergency shutoff make for clean, code-compliant installations with fewer external components.
All-Weather Durability- IP65-rated and equipped with internal heating elements for reliable performance in extreme conditions, from freezing temperatures to high humidity.
Whole-Home Compatibility- Pairs with the Fortress Power Envy Duo 21 inverter for seamless whole-home backup and energy management.
Quick Scale & Deploy- Modular, scalable design with fast-connect hardware reduces install time and labor while maintaining a clean, professional appearance.
| 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 |