eSpire Mini Energy Storage System

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.

Fortress Power eSpire Mini 1

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.

eSpire Mini Line Diagram
Battery Capacity 81/122/184 kWh 122/184/244 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 3.2Vdc / 100Ah
Cell Configuration/Pack 2P16S
Pack Spec 51.2 V / 200 Ah
Pack Nominal Energy (kwH) 10.24 kWh
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 / 208 Vac 480 Vac / 208 Vac 480 Vac / (208 Vac)*
Grid Voltage Range ± 15% / ± 10%
AC Rated Current 36.1 / 83.3 Amps 72.2 / 166.5 Amps 108.3 / 250 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 in (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)
()* External Transformer is required