Knowledge Base › Battery Racks
Fortress Power DuraRack
Official manufacturer NA verified Sept. 25, 2026
Identity
| category | battery_racks |
| manufacturer | Fortress Power |
| model | DuraRack |
| product_status | active |
| region | NA |
Electrical
| busbars_to_inverter |
2 points; m10 (3/8) Terminal Rings
DuraRack - Indoor / Outdoor Enclosure
|
| chemistry | LFP (LiFePO4) |
| continuous_discharge_current_a | 100.0 |
| cycle_life | 6000 |
| depth_of_discharge_pct | 95.0 |
| enclosure_colour |
White
DuraRack - Indoor / Outdoor Enclosure
|
| knockout_size |
1 inch & 2 inch
DuraRack - Indoor / Outdoor Enclosure
|
| max_battery_units |
4
DuraRack - Indoor / Outdoor Enclosure
|
| max_charge_current_a | 80.0 |
| max_discharge_current_a | 100.0 |
| max_storage_capacity_kwh |
81
DuraRack - Indoor / Outdoor Enclosure
|
| negative_bus |
2 x 4 points; M8 (5/16) Terminal Rings
DuraRack - Indoor / Outdoor Enclosure
|
| nominal_capacity_ah | 100.0 |
| nominal_energy_kwh | 5.12 |
| nominal_voltage_v | 51.2 |
| operating_voltage_max_v | 57.6 |
| operating_voltage_min_v | 44.8 |
| positive_bus |
2 x 4 points; M8 (5/16) Terminal Rings
DuraRack - Indoor / Outdoor Enclosure
|
| storage_capacity_range_kwh |
5.4 - 21.6 per unit
DuraRack - Indoor / Outdoor Enclosure
|
| supported_battery_modules |
['eFlex 5.4']
DuraRack - Indoor / Outdoor Enclosure
|
| terminal_torque |
7.0 - 7.7 Nm (5.1 - 5.7 ft-lb)
DuraRack - Indoor / Outdoor Enclosure
|
| usable_energy_kwh | 4.86 |
| warranty_years |
3
DuraRack - Indoor / Outdoor Enclosure
|
Physical / mechanical
| depth_mm |
458
DuraRack - Indoor / Outdoor Enclosure
|
| enclosure_material |
Carbon Steel
DuraRack - Indoor / Outdoor Enclosure
|
| height_mm |
1050
DuraRack - Indoor / Outdoor Enclosure
|
| weight_kg |
59.6
DuraRack - Indoor / Outdoor Enclosure
|
| width_mm |
744
DuraRack - Indoor / Outdoor Enclosure
|
Installation
| mounting |
floor standing / wall
DuraRack - Indoor / Outdoor Enclosure
|
Environment
| ip_rating |
IP54
DuraRack - Indoor / Outdoor Enclosure
|
| operating_temperature_max_c | 60.0 |
| operating_temperature_min_c | -25.0 |
Interfaces & connectors
| communication | CAN, RS485 |
Certifications
| certifications |
UL9540, UL9540A, UL1973, CEC, SGIP
DuraRack - Indoor / Outdoor Enclosure
|
Documents
certificate
DuraRack UL 9540A Certification
datasheet
DuraRack / FlexTower Data Sheet
installation_manual
DuraRack / FlexTower Installation Manual
installation_manual
DuraRack Heat Mat Kit Guide
product_page
DuraRack - Indoor / Outdoor Enclosure
Additional documented parameters
Recorded verbatim from the source; no schema field exists for these yet.
| builder_completeness | partial |
| region_notes | US manufacturer; all published certification is North American (UL 1973 / UL 9540 / UL 9540A / CEC / SGIP / OGPe) and ANMA already stores Fortress Power under region NA. |