Knowledge Base › Commercial Ess
Fortress Power eSpire 306
Official manufacturer NA verified Sept. 25, 2026
Page 1 of eSpire 306 Data Sheet (https://www.fortresspower.com/download/946/espire-306/47885/fortress-power-espire-306-data-sheet.pdf)
Identity
| category | commercial_ess |
| manufacturer | Fortress Power |
| model | eSpire 306 |
| product_status | active |
| region | NA |
Electrical
| bms_integrated |
True
eSpire 306 Energy Storage System
|
| cell_chemistry |
Lithium Iron Phosphate
eSpire 306 Energy Storage System
|
| cell_type |
Prismatic
eSpire 306 Energy Storage System
|
| chemistry | LFP (LiFePO4) |
| continuous_discharge_current_a | 306.0 |
| cooling |
liquid
eSpire 306 Energy Storage System
|
| cycle_life |
10,000 Cycles @ 25C @ 70% Retention
eSpire 306 Energy Storage System
|
| dc_voltage_max_v |
1123.2
eSpire 306 Energy Storage System
|
| dc_voltage_min_v |
873.7
eSpire 306 Energy Storage System
|
| dc_voltage_nominal_v |
998.4
eSpire 306 Energy Storage System
|
| depth_of_discharge_pct | 95.0 |
| ems_integrated |
True
eSpire 306 Energy Storage System
|
| fire_suppression |
True
eSpire 306 Energy Storage System
|
| max_charge_current_a | 244.8 |
| max_continuous_charge_discharge_current_a |
153
eSpire 306 Energy Storage System
|
| max_discharge_current_a | 306.0 |
| max_parallel_units |
20
eSpire 306 Energy Storage System
|
| nominal_capacity_ah |
306
eSpire 306 Energy Storage System
|
| nominal_energy_kwh |
305.5
eSpire 306 Energy Storage System
|
| nominal_voltage_v | 51.2 |
| number_of_modules |
6
eSpire 306 Energy Storage System
|
| operating_voltage_max_v | 57.6 |
| operating_voltage_min_v | 44.8 |
| pack_configuration |
1P52S
eSpire 306 Energy Storage System
|
| pcs_integrated |
False
eSpire 306 Energy Storage System
|
| phase_count | 3 |
| round_trip_efficiency_percent |
95
eSpire 306 Energy Storage System
|
| scalability |
Up to 20 (6.1 MWH)
eSpire 306 Energy Storage System
|
| topology |
cabinet
eSpire 306 Energy Storage System
|
Physical / mechanical
| depth_mm |
1300
eSpire 306 Energy Storage System
|
| height_mm |
2280
eSpire 306 Energy Storage System
|
| mounting | 19-inch Rack / Wall-mount |
| weight_kg |
3005
eSpire 306 Energy Storage System
|
| width_mm |
1300
eSpire 306 Energy Storage System
|
Environment
| ip_rating |
Type IP66, NEMA 3R
eSpire 306 Energy Storage System
|
| operating_temperature_max_c | 60.0 |
| operating_temperature_min_c | -25.0 |
| operating_temperature_range_c |
Charging: 0-55; Discharging: -20-55
eSpire 306 Energy Storage System
|
Interfaces & connectors
| communication | CAN, RS485 |
| protocols |
['Modbus TCP', 'CAN', 'Modbus RTU']
eSpire 306 Energy Storage System
|
Certifications
| certifications |
UL1973, UL9540[A], UL1741-SB, IEEE-1547-2018, IEEE-519, FCC Part 15 Class A, UL9540, CEC, SGIP, OGPe
eSpire 306 Energy Storage System
|
Warranty & service
| warranty_years | 10 |
Documents
certificate
Fortress Power C&I Warranty
datasheet
eSpire 306 Data Sheet
product_page
eSpire 306 Energy Storage System
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. |