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Fortress Power eSpire Mini 480VAC > Commercial Battery Storage Backup System
Fortress Power eSpire Mini ESS 480 > 30-90kW, 81-266kWh, 480 VAC Commercial Battery Energy Storage System (BESS) - Home or Business Battery Backup

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Warranty: Inverter: 10 Years / Lead Acid or Fortress Lithium Batteries Only | Battery: 10 year product warranty & guarantee up-to 6000 cycles, whichever comes first.


Description Datasheet

Fortress Power > 30-90kW, 81-266kWh, 480 VAC Commercial Battery Energy Storage System (BESS) - Home or Business Battery Backup

Manufacturer Part Number: Fortress Power eSpire Mini 480

Fully Integrated, Pre-configured Turnkey Solution
The eSpire Mini Energy storage system is a fully integrated, pre-configured turnkey solution for Large Residential and Light Commercial Projects (3Ph 208/480Vac @60Hz). The eSpire Mini has numerous applications such as Microgrid, backup, off-grid peak shaving, time of use, self supply, demand response and Virtual Power Plant (VPP). With AC and DC Coupling options, indoor and outdoor installation and Scalable capacity from 81-266kWh per unit, the eSpire Mini is perfect for your next project.

One Solution For All

  • Large Residential - Light Commercial
    (3Ph 208/480Vac @ 60Hz)
  • Microgrid, Backup, Off-Grid, Peak Shaving, Time of Use, Self-Supply, Demand Response, and VPP
  • AC and DC Coupling Options
  • Scalable Energy Storage Capacity (81 - 266 kWh per unit)
  • Indoor and Outdoor Installation

Sample Applications

  • Residential homes & Multi-family
  • Grocery Stores & Convenience Stores
  • Charging Stations & Service Areas
  • Schools, Banks, & Hospitals
Model eSpire Mini (480 VAC)
Series eSpire
Manufacturer Fortress Battery


Battery Capacity 81/122/184 kWh 122/184/246 kWh 184/266 kWh
DC Data
Battery Chemistry Lithium Iron Phosphate
Cell Life Cycle 80% Retention with 6,000 cycles @ 1 C 25 C
Cell Spec 63.2Vdc / 100Ah
Cell Configuration/Pack 2P16S
Pack Spec 51.2 V / 200 Ah
Pack Nominal Energy (kwH) 10.24 kWh
Battery DC Voltage Range 627.2Vdc to 795.2Vdc, 716.8Vdc Nominal
String Rack Configuration 1P8S IP12S 2P9S
Rack Nominal Energy 81 kWh 122 kWh 184 kWh
Rack Nominal Voltage 409.6 Vdc 614.4 Vdc 460.8 Vdc
Voltage Range 358.4 - 467.2 Vdc 537.6 - 700.8 Vdc 403 - 525.6 Vdc
BMS Communication Interface RS485 via Serial, Ethernet via Cat 5 or Cat 6
BMS Communication Protocol Modbus RTU, Modbus TCP
AC Data
PCS Rated AC Power 30 kW 60 kW 90 kW
Rated Grid Voltage 480 Vac 480 Vac 480 Vac
Grid Voltage Range 15% / 10%
AC Rated Current 36.1 Amps 72.2 Amps 108.3 Amps
Islanding Switch 100 kW Autotransfer Switch (ATS) Active Switching Transfer Time: Seamless
Output THDi ≤ 3%
Grid Connected Power Factor 1 (leading) ~ 1 (lagging)
Grid Frequency Range 50 Hz / 60 Hz 2.5%
Wiring Configuration 3 Phase 4 Wire (3P4W Configuration)
PV Input (DC Coupled Only)
PV Input Power 45 kW 90 kW 135 kW
PV Input Voltage Range 200 - 810 Vdc
General Data
Dimensions without Clearance
(W x D x H)
82.7" x 47.2" x 92.5"
(2100 x 1200 x 2350 mm)
Weight of Whole System Up to 5253.5 lbs
Enclosure Degree of Protection NEMA 3R / IP54
Operating Temperature Range -22 F to 131 F (-30 C to 55 C)
Relative Humidity 0 ~ 90% (No Condensing)
Max Altitude 10,000 ft (3,000 m)
Noise Level 70 dB
Cooling System Forced Air Cooling
Communication Interface RS485, Ethernet, HMI
Certificates UL1973, UL9540(A), UL1741-SB, IEEE-1547, IEEE-519, (UL9540, CEC, SGIP pending)

Product Features

  • Turnkey Solution for Fast Install
    Fully integrated, pre-configured package system reduces on-site installation time; includes inverter(s), battery trays, racks, BMS, Microgrid Controller, HVAC, fire suppression, islanding switch, and outdoor rated enclosure.

  • Built-in Microgrid Controls
    Ability to integrate with solar, genset, wind, micro-turbines, utility, or other distributed energy resources.

  • Adaptive Intelligent EMS / Fleet Management
    Intelligent software to reduce electricity cost, prepare for resiliency, and maximize return on investment. Remote operation and maintenance for multiple sites.

  • Safe Technology & Multi-level Protection
    Tier 1 Lithium Iron Phosphate (LFP) chemistry for the highest level of safety, thermal stability, and reliability; An integrated, multi-level Battery Management System (BMS) monitors, optimizes, and balances the system.

  • Easy & Flexible to scale (Easy scalability)
    This outdoor rated, modular solution can be expanded depending on the energy and power requirement at either 208Vac or 480Vac with a maximum of 2 units in parallel.

  • Excellent Local Support
    Our US based technical support team can help you from project design to completion.

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