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eSpire 306 Energy Storage System

Commercial + Industrial Battery Storage
The eSpire 306 is Fortress Power’s flagship commercial energy storage system, offering up to 554 kWh of capacity and advanced control features for grid support, peak shaving, and backup power. Designed for large-scale facilities and microgrid integration, it delivers reliability, flexibility, and long-term value

Technical Data

Number of Modules	6
Nominal Capacity	306 Ah
Nominal Energy	305.5 kWh
Nominal Voltage	998.4 Vdc
Operating Voltage Range	873.7 - 1123.2 Vdc
Maximum Continuous Charging/Discharging Current	153 Amps
Cycle Life @ 25C @ 70% Retention	10,000 Cycles
Certifications	UL1973, UL9540A, UL9540, NFPA 855, NFPA 68, NEMA 3R, IEC 62477, IEC 62619, IEC 62933-5-2, IEC 61000-6-2, IEC 61000-6-4, UN38.2

Download specification sheet