The Fortress Power eSpire Mini is a fully integrated, turnkey commercial energy storage system (ESS) designed to bridge the gap between large residential and industrial applications. Available in both 208V and 480V three-phase configurations, this all-in-one outdoor cabinet combines a powerful hybrid inverter, high-voltage battery bank, active cooling, and fire suppression into a single, pre-wired unit. It is the ultimate solution for businesses looking to cut demand charges or back up critical facilities without building a custom battery room.

Why Choose eSpire Mini

The eSpire Mini is chosen by installers who want a “drop-in” commercial solution. Traditional commercial storage requires sourcing separate inverters, batteries, BMS, and HVAC systems, then integrating them on-site. The eSpire Mini arrives pre-configured and tested, drastically reducing installation time and risk. Its ability to handle peak shaving, demand response, and microgrid islanding out of the box makes it a powerful asset for ROI-focused businesses.

Benefits of eSpire Mini

• Turnkey Simplicity: Arrives as a complete package with the inverter, batteries, BMS, and thermal management already integrated, eliminating complex on-site wiring and configuration.

• Demand Charge Management: Intelligent software automatically discharges batteries during expensive peak demand windows, potentially saving businesses thousands in monthly utility fees.

• Microgrid Ready: Built-in microgrid controller allows seamless integration with solar, generators, and wind, enabling facilities to operate independently of the grid indefinitely.

• Ultimate Safety: Features Tier 1 LFP chemistry and a multi-level safety system, including an integrated fire suppression system and aerosol sensors, meeting strict commercial fire codes.

General Data

• Dimensions (W x D x H): 82.7 x 51.18 x 97.05 in (2100 x 1300 x 2465 mm)

• Weight: Up to 8860 lbs

• Enclosure Rating: NEMA 3R / IP54

• Operating Temperature: -22°F to 131°F (-30°C to 55°C)

• Certifications: UL 9540, UL 1973, UL 1741-SB, IEEE 1547-2018

Frequently Asked Questions

Q1: Does this system require an external transformer?

No. The eSpire Mini is available in native 208V and 480V configurations, allowing it to connect directly to most commercial electrical services without bulky external transformers.

Q2: Is it suitable for outdoor installation?

Yes. The unit is housed in a rugged NEMA 3R / IP54 rated enclosure with a built-in industrial HVAC system, allowing it to operate safely outdoors in rain, snow, and heat.

Q3: How heavy is the unit?

It is extremely heavy, ranging from 5,000 to nearly 9,000 lbs. It requires a crane or heavy-duty forklift for placement and a reinforced concrete pad engineered to support the weight.

Q4: Can I use it for a large home?

Yes. While designed for commercial use, it is an excellent choice for large luxury estates or compounds with 3-phase power or high energy demands (100kWh+) that exceed typical residential equipment limits.

Q5: What happens if there is a fire?

The unit includes an integrated fire detection and suppression system. If a thermal event is detected, it automatically discharges a suppressant to extinguish the fire and prevent propagation, ensuring safety for the facility.

If you have any questions about the item or your order, please feel free to message before purchasing. Thank you!