Fortress Power eSpire Nano 60kW Commercial ESS

 The Fortress Power eSpire Nano is a turnkey, pre-configured DC/AC-coupled battery energy storage system (BESS) built for commercial and industrial applications. The 60kW inverter configuration delivers residential-speed commissioning with commercial-grade performance, supporting peak shaving, load shifting, time-of-use optimization, backup power, microgrid integration, and VPP participation.

This outdoor-rated, modular system arrives pre-assembled with inverter, Tier 1 Lithium Iron Phosphate (LFP) battery, advanced BMS, and intelligent climate control (HVAC), with an integrated STS for enhanced resiliency. Up to six inverters can be paralleled for larger projects, and the system integrates with solar PV, generators, and the grid through built-in microgrid controls.

Backed by a 10-year warranty (70% retention, 8,000 cycles) and North America-based technical support from project design through commissioning.

Available Battery Configurations (60kW Inverter, 480V only):

• 60kW / 60kWh
• 60kW / 80kWh -- 2x40kWh
• 60kW / 120kWh -- 2x60kWh

Key Specifications:

Inverter Output: 60 kW (480 Vac 3P4W)
Rated Current: 72.2 A
Max Current Passthrough: 144.4 A
Backup Switch Time: < 10ms
PV Input: Up to 100 kW usable, MPPT range 150-850 Vdc (full load 600-850 Vdc), max 1000 Vdc, 4 MPPT / 8 strings
Inverter Efficiency: 97.80% | DC-DC Round Trip Efficiency: 97.80%
Battery Type: LFP, Nominal Capacity 100 Ah, Max Discharge/Charge Current 100 A
Weight (40kWh / 60kWh with inverter): 1,940 lb (880 kg) / 2,381 lb (1080 kg)
Battery Cabinet Dimensions (W x H x D): 28.93 x 87.40 x 44.29 in (735 x 2220 x 1125 mm)
Inverter Dimensions (W x H x D): 22.04 x 36.61 x 12.60 in (560 x 930 x 320 mm)
Operating Temperature: -4°F to 122°F (derating above 113°F)
Enclosure Rating: IP55 (IP20 indoor option)
Communication: CAN, RS485-115200, Ethernet (optional Wi-Fi, Cellular, LAN)
Certifications: UL1973, UL9540A, UL9540, UL1741, FCC Part 15, IEEE 1547, UN38.3

Available in two package tiers: Standard (cloud dashboard, fleet management, standard peak shaving/TOU/solar optimization, included at no additional cost) or Pro EMS (Keystone Controller, eGauge metering, advanced device monitoring, complex utility rate optimization, VPP integration, and Tier 2 support -- available at additional cost).