Best Commercial & Industrial Battery Storage Systems in 2026
Commercial and industrial (C&I) facilities use battery energy storage to cut demand charges, shift load, back up critical operations, and pair with on-site solar. These are the top providers of behind-the-meter C&I battery storage.
Top Commercial & Industrial Storage Providers
1. Fluence
A market-leading BESS provider whose ecosystem scales from plug-and-play commercial offerings to large industrial deployments, with strong digital and configuration options.
Key Features: Commercial Systems, Plug and Play, Configurable, Product Manufacturer
2. Aggreko
Plug-and-play, self-contained BESS rental at a variety of sizes, one of the fastest ways for commercial and industrial sites to deploy storage without a permanent capital project.
Key Features: Plug and Play, Rental, Commercial Systems
3. Honeywell
Customizable, scalable BESS systems backed by industrial automation expertise, well suited to factories and large facilities with complex controls.
Key Features: Commercial Systems, Enterprise Systems, Product Manufacturer
4. American Energy Storage Innovations, Inc.
Self-contained BESS systems and software with configurable scale, designed to match a range of commercial and industrial load profiles.
Key Features: Configurable, Product Manufacturer, Commercial Systems
Learn more about American Energy Storage Innovations
5. Power Sonic
Tailor-made energy storage with smart technologies, drawing on decades of battery expertise to support grid resilience and peak demand management in demanding applications.
Key Features: Commercial Systems, Product Manufacturer
6. Concentric
Customized BESS solutions paired with consulting and energy systems operation services for businesses that want a managed approach.
Key Features: Customizable, Commercial Systems
7. Viridi
Large-scale, mobile, and smaller backup systems with IoT telematics and edge computing, useful for industrial sites needing safe, distributed storage.
Key Features: Commercial Systems, Enterprise Systems, Product Manufacturer
8. ESS, Inc.
Iron flow battery systems built for consistent output over long durations, a fit for industrial sites needing extended discharge.
Key Features: Commercial Systems, Enterprise Systems, Design Build
Why Commercial & Industrial Sites Add Battery Storage
- Demand charge reduction - Discharge during peak periods to lower utility demand charges.
- Load shifting - Store cheap off-peak energy and use it when prices are high.
- Backup power - Keep critical processes running through outages.
- Solar self-consumption - Capture excess on-site generation for later use.
Frequently Asked Questions
How big is a typical C&I battery storage system?
Commercial and industrial systems commonly range from tens of kilowatt-hours for small businesses to several megawatt-hours for large factories. Many providers offer configurable or containerized systems that scale with the site.
Should I buy or rent commercial battery storage?
Rental options, such as Aggreko's plug-and-play units, suit temporary needs, fast deployment, or projects testing storage before committing to capital. Owned systems usually make more sense for permanent demand charge or resilience strategies.
Can battery storage pair with my existing solar?
Yes. Most C&I storage systems are designed to integrate with on-site solar to increase self-consumption and provide backup, and several providers also supply compatible inverters and controls.
Comparing options? See our best BESS companies guide or browse all listings.