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Powering Businesses, Facilities & Critical Infrastructure

Fortress Power’s commercial and industrial energy storage systems are engineered to deliver scalable, high-capacity solutions for businesses, schools, healthcare centers, and government facilities, no matter the need.

Filling the Market Gap in Commercial Energy Storage

Many commercial and industrial energy storage projects fall into a challenging mid-range—too large for residential products and too small for utility-scale solutions. These projects often involve complex site conditions, custom engineering, and extended sales timelines. Fortress Power is purpose-built to serve this underserved space, offering scalable, flexible systems backed by expert technical support. We simplify the path to deployment with a blend of pre-engineered products and hands-on guidance tailored to each site’s needs.

40kWh up to 4.2 MWh

Modular Components

All-in-One Solution

Turnkey commercial energy storage systems

Our solutions come pre-engineered for streamlined integration with solar, EV charging, or backup power needs. These all-in-one systems reduce project timelines and simplify installation.

Support for grid services and demand charge management

Our systems are designed to support cost-saving strategies like peak shaving & time-of-use optimization. In select markets, our solutions can also participate in grid services programs for added revenue streams.

Trusted by Utilities & Government Agencies

With proven success in large-scale government and utility deployments, Fortress Power is a partner you can trust for both standard and complex energy projects.

Scalable solutions for custom applications

From warehouse backup power to multi-site fleets and microgrids, our systems scale to match your unique requirements. Our modular approach gives you flexibility today and room to grow tomorrow.

Trusted by Businesses, Municipalities, Schools, and Energy Providers Across the U.S.

Auto Dealerships

Every DC fast charger installation risks triggering higher demand charges on your utility bill. Fortress Power battery systems absorb those spikes, support expanded EV charging infrastructure without costly service upgrades, and enable dealerships to earn revenue through Vehicle-to-Grid (V2G) and utility demand response programs.

Manufacturing Facilities

Demand charges on heavy equipment can represent 30–50% of a manufacturer’s electricity bill. Fortress Power industrial battery systems eliminate those spikes, keep production lines running through outages via microgrid formation, support EV and electric forklift charging, and generate revenue through demand response and utility incentive programs.

Agricultural Facilities

An unexpected grid outage on a farm can mean lost crops, spoiled product, or halted irrigation. Fortress Power battery storage reduces peak demand charges on high-draw equipment, maintains operations automatically during outages, and pairs with on-site generators for extended off-grid capability in remote or rural locations.

Quick Serve Restaurants

In food service, a power outage that spoils inventory can erase an entire week of margin. Fortress Power delivers immediate backup power to prevent food spoilage, reduces energy costs through demand charge management, and gives high-volume restaurant operations the resiliency they need to protect revenue and customers.

Retail Locations

Fortress Power commercial battery storage reduces retail electricity costs through peak demand shaving and time-of-use optimization. Retail facilities can also participate in utility demand response and VPP incentive programs, turning their energy storage investment into an ongoing revenue stream.

School & Universities

Schools and universities can lower energy costs through peak demand reduction, maintain campus operations during outages, and enable EV charging for bus fleets — all without triggering demand charge spikes. Fortress Power eSpire systems are also compatible with federal and state grant funding programs, making commercial battery storage accessible for districts working within tight capital budgets.

Commercial & Industrial Products

eSpire Nano Commercial Energy Storage System

The 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.

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eSpire Mini Commercial Energy Storage System

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) and multiple applications.

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eSpire 306 Commercial Energy Storage System

The eSpire 306 is Fortress Power’s flagship commercial energy storage system, offering up to 554 kWh of capacity and advanced control features for grid support, peak shaving, and backup power.

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Trusted by Leading Organizations Across Every Industry

From schools and municipalities to agricultural operations and commercial facilities, Fortress Power commercial energy storage systems are deployed nationwide.

Keystone Energy Management System for Commercial & Industrial Applications

Fortress Power’s Keystone Energy Management System (EMS) unifies solar, storage, EV charging, and generators under one intelligent platform — delivering lower energy costs, greater reliability, and total control.

OPERATIONAL INTELLIGENCE

Real-time Insights and Monitoring

Automated Scheduling and Controls

Historical Performance Analysis

O&M Reporting and Alarm Tools

SCALABLE MANAGEMENT

Individual Site or Multi-Site Portfolios

Centralized Dashboards for Multiple Stakeholders

Customizable Alerts and Reports

Flexible Integration with New or Legacy Assets

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Commercial & Industrial Success Stories

Discover how Fortress Power’s advanced energy storage and EMS solutions are helping customers today.

Landmark Solar + Storage Project at Team Toyota

Fortress Power partnered with TerraSol Energies to deliver a landmark solar + storage project for Team Toyota of Glen Mills, PA. The installation features an 820kWh Fortress Power eSpire commercial energy storage system paired with a 700kW solar array, creating one of the region’s most efficient dealership energy systems.

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Grid-tied ESS for energy cost-savings at Chick-Fil-A

A national quick service restaurant chain added the eSpire Mini “microgrid in a box” and a solar PV canopy to a location in Oceanside, California to meet corporate renewables targets and for energy cost savings. The system will pay for itself in just two and half years and cut monthly electric bills by 50%.

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EV Charging Depot Enhances Reliability and Reduces Costs

A California bus charging depot addressed rolling blackouts and rising utility costs caused by L3 EV chargers using Fortress Power’s eSpire BESS and Keystone EMS, achieving improved resiliency, peak shaving, and VPP capabilities with an estimated payback in under 6 years.

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Agricultural Facility Boosts Resiliency and Reduces Costs

An agricultural facility in Malibu, CA, overcame blackout disruptions and high energy costs using Fortress Power’s eSpire Mini BESS and Keystone EMS, achieving improved reliability, peak shaving, and VPP capabilities with an estimated payback in under 5 years.

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Common Questions About Commercial & Industrial Energy Storage

Payback periods vary based on several factors — your location, local utility rates, demand charge structure, available incentive programs, system size, and what the system is being used for. A Chick-fil-A location in California achieved payback in 2.5 years through a combination of demand charge reduction and solar self-consumption. An agricultural facility in Malibu reached payback in under 5 years. Contact our team for a project-specific estimate based on your facility's actual numbers.

Plan for approximately 12 months from initial project outline to a fully commissioned system. Commercial systems are produced to order and shipped directly to site, so lead times are a factor. Additional variables include the local permitting process, solar array installation if applicable, and overall system size. Starting the project outline early is the single biggest factor in hitting your target commissioning date.

Fortress Power commercial energy storage systems start at 40kWh with the eSpire Nano — designed for smaller commercial and light industrial applications. From there, systems scale modularly up to 4.2MWh, making Fortress Power a practical option for projects that fall in the mid-market gap between residential and utility-scale. If you're unsure whether your project fits, fill out the C&I Checklist and our team will assess it.

The fastest path to a system recommendation is completing our Commercial & Industrial ESS Checklist. It gathers the key information our team needs — facility type, energy goals, utility provider, and project timeline — so we can match you to the right system and connect you with the appropriate resources. Fill out the checklist at the link below and a member of our commercial team will follow up directly.

Contact Us for a Customized Quote

Our goal is to gather essential information about your project to ensure we recommend the most suitable product for your needs. We created a project checklist to help speed up the process.

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