eSpire Nano Commercial Energy Storage SystemModular, Pre-Configured DC/AC Coupled Energy Storage Solution for Commercial + Industrial ApplicationsThe Fortress Power eSpire Nano is a turnkey outdoor battery energy storage system (BESS) engineered for commercial and industrial projects that demand reliability, flexibility, and fast deployment. Delivered pre-configured with inverters, Lithium Iron Phosphate (LFP) batteries, advanced BMS, and intelligent climate control, the eSpire Nano simplifies installation while supporting a wide range of applications—from peak shaving and load shifting to microgrids, backup power, and VPP participation. With multiple inverter and battery configurations available, the eSpire Nano scales to meet evolving energy and power requirements while delivering long-term performance backed by a 10-year warranty.
Applications - Manufacturing Plants
- Grocery and Convenient Stores
- Charging Stations and Service Areas
- Schools, Banks and Hospitals
- eSpire Nano Battery Installation Manual | Download
- eSpire Nano Inverter Installation Manual | Download
- C+I Product Warranty | Download
- Data Sheet | Download
- eSpire Nano UL1741 Certification | Download
- eSpire Nano UL1741CRDMM Certification | Download
- eSpire Nano UL3141 Certification | Download
- eSpire Nano Outdoor UL1973 Certification | Download
- eSpire Nano Outdoor UL9540 Certification | Download
- eSpire Nano Outdoor UL9540A Certification | Download
Safe Technology & Multi-level ProtectionThe solution uses the best-in-class 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.
Adaptive Intelligent EMS / Fleet ManagementIntelligent software to reduce electricity cost, prepare for resiliency, and maximize return on investment. Remote operation and maintenance for multiple sites.
Built-in Microgrid ControlsAbility to integrate with solar, genset, wind, micro-turbines, utility, or other distributed energy resources.
Flexible Power & Capacity ConfigurationsAvailable with 40 kWh or 60 kWh battery options and 30 kW or 60 kW inverter configurations, supporting 208 / 220 / 240 Vac (3P4W) or 480 Vac (3P4W) applications. Supports paralleling up to six inverters.
Turnkey DC/AC-Coupled Energy StorageThe eSpire Nano is a fully pre-configured outdoor BESS that integrates inverter(s), LFP batteries, BMS, intelligent climate control, and an integrated STS for enhanced resiliency
Excellent Local SupportOur US based technical support team can help you from project design to completion.
| AC (Grid Side) | 30kW Inverter | 30kW Inverter | 60kW Inverter |
|---|
| Rated Input Voltage | 208 / 220 / 240 Vac 3P4W | 480 Vac 3P4W |
| Rated Current | 72.2 A | 36.1 A | 72.2 A |
| Max Current Passthrough | 144.4 | 72.2 | 144.4 A |
| Max Discharge/Charge Current | 72.2 A | 36.1 A | 72.2 A |
| Rated Input Frequency | 60 Hz |
| Input Frequency Range | 55 – 65 Hz |
| Grid Power Factor | > 0.99 (0.8 leading ~ 0.8 lagging) |
| THDI | ≤ 3% |
| Input – Generator |
| Max Output Power | 26 / 27.5 / 30 kW | 30 kW | 60 kW |
| Max Input Current | 72.2 A | 36.1 A | 72.2 |
| Rated Input Voltage | 208 / 220 / 240 Vac 3P4W | 480 Vac 3P4W |
| Rated Input Frequency | 60 Hz |
| Output – AC (Backup) |
| Rated Output Power | 26 / 27.5 / 30 kW | 30 kW | 60 kW |
| Max Apparent Output Power | 1.6 times of rated power with 2s |
| Backup Switch Time | < 10ms |
| Rated Output Voltage | 208 / 220 / 240 Vac 3P4W | 480 Vac 3P4W |
| Rated Frequency | 60 Hz |
| Rated Output Current | 72.2 A | 36.1 A | 72.2 |
| Max Imbalance Power Per Phase | 33% rated power |
| THDv (@linear load) | < 2% |
| PV side parameters |
| Max. usable PV input power | 60 kW | 100 kW |
| Rated MPPT Voltage | 600 V |
| Operating MPPT voltage range (DC) | 150 – 850 V |
| Maximum Input Voltage (DC) | 1000 V |
| Start-up Voltage (DC) | 180 V |
| Full Load MPPT Voltage Range (DC) | 500 – 850 V | 600 – 850 V |
| Max. input current per MPPT | 3 x 42 A | 4 x 42 A |
| MPPT number / Max. input strings number | 3/6 | 4/8 |
| Max input power per MPPT | 25 kW (600 V x 42 A) |
| DC Battery | 40 kWh | 60 kWh |
|---|
| Rated Battery Capacity | 40 kWh | 60 kWh |
| Battery Type | LFP (Lithium Iron Phosphate) |
| Nominal Capacity | 100 Ah |
| Pack Configuration | 1P128S | 1P192S |
| Rack Configuration | 8 | 12 |
| Nominal Energy (kWh) | 40.96 kWh | 61.44 kWh |
| Nominal Voltage | 409.6Vdc | 614.4Vdc |
| Operating Voltage Range (Vdc) | 358.4 – 460.8 Vdc | 537.6 – 691.2 Vdc |
| Max Discharge/Charge Current | 100 A |
| Inverter Efficiency | 97.80% |
| DC-DC Round Trip Efficiency | 97.80% |
| Max Inverter Parallel Numbers | 6 |
| Weight with inverter (40kWh / 60kWh) | 1,940 Ib (880 kg) / 2,381 Ib (1080 kg) |
| Cooling and Heating Mode | HVAC |
| Battery Cabinet Dimension (W x H x D) without inverter | 28.93 x 87.40 x 44.29 in (735 x 2220 x 1125 mm) |
| Inverter Dimension (W x H x D) | 22.04 x 36.61 x 12.60 in (560 x 930 x 320 mm) |
| Operation Altitude | 8,202 ft. (2,500 m) |
| Operation Temperature | -4°F – 122°F (derating >113°F) (-20°C – 50°C (derating >45°C)) |
| Operation Humidity | 0 – 95% |
| Noise Level | ≤ 75dB @ 3.28 ft (1 m) |
| Enclosure Degree of Protection | IP55 (IP20 w/ indoor option) |
| Anti-Corrosivity Category | C4 |
| Fire Protection | BMS pre-alarm, Smoke sensor, temp. sensor, Aerosol, gas sensor & exhaust fan (optional) |
| Auxiliary Power Supply | External power supply (208~240Vac or 480Vac VL-L) |
| EMS (Optioanl) | Adaptive Peak Shaving, Demand Response, VPP, Back-up, Microgrid, Off-Grid |
| Communication | CAN, RS485-115200, Ethernet, Optional: Wi-Fi, Cellular, LAN |
| Certification | UL1973, UL9540A, UL9540, UL1741, FCC Part 15, IEEE 1547, UN38.3 |
| Warranty | 10 years, 70% Retention with 8000 cycles |
| User interface | HMI, Homeowner/Installer Application, Fleet Manangement Portal, Real-time Monitoring, |