With the shift toward renewable energy sources like solar power and batteries, energy storage systems can help to ensure there’s power available to meet demand. These solutions are designed to be durable and reliable enough to hold on to electrical energy until it needs to be used. Additionally, they come with a variety of other benefits, such as saving utility providers — and by extension their customers — money, as well as providing backup power in the event of an emergency. We’ve rounded up some top energy storage companies coming up with short- and long-term methods of capturing energy for later use.
Top Energy Storage Companies to Know
- Tesla
- BYD
- CATL
- Fluence
- Sungrow
Energy Storage Companies to Know
Headquarters: Arlington, Virginia
Founded: 2018
What they do: Fluence’s energy storage systems are designed for common use cases, yet are customizable for less typical applications. Products include Gridstack, a grid-scale energy storage system, and Sunstack, which stores energy generated by solar energy systems. The company offers four tiers of operational service packages to go with its products: guided service, shared service, complete service and asset management.
Headquarters: Somervilla, Massachusetts
Founded: 2017
What they do: Form Energy is an energy tech and manufacturing company that is developing a multi-day battery — a necessary component of a clean energy grid. Using iron-air technology, Form Energy batteries have the capacity to store electrical energy for up to 100 hours. Because they are made of just iron, water and air, the company says the production of these batteries is inexpensive, safety-compliant and sustainable.
Headquarters: Westlake Village, California
Founded: 2017
What they do: Energy Vault specializes in energy storage for short duration and long duration power needs. It provides everything a client has to have to collect and store energy and integrate it into their existing system. Energy Vault’s long-duration solution uses its proprietary “Gravity Energy Storage System” to “autonomously coordinate balanced storage and dispatch of electricity for grid-scale applications.”
Headquarters: Atlanta, Georgia
Founded: 2010
What they do: Sonnen makes smart home batteries that collect and store solar energy, which can then be used to power homes on a routine or emergency basis. Its three product lines are Evo for outdoor installation, Core+ for indoor installation and ecoLinx, which integrates with smart home automations. Clients can manage usage on the Sonnen app.
Headquarters: Tualatin, Oregon
Founded: 1989
What they do: Powin sells products for energy storage, including a modular battery system, battery management software and a power conversion system. The company is involved at every level of production, starting with material sourcing, to ensure efficiency and compliance with its sustainability standards. It has engineered and installed photovoltaic, primary frequency response and hybrid grid facilities around the world.
Headquarters: Austin, Texas
Founded: 2003
What they do: Although it is best known for its electric vehicles and robotaxis, Tesla is also a leader in energy storage. The company provides battery storage hardware as well as energy software for residential, commercial and utility clients. With its management software, Autobidder, Tesla’s storage solutions can leverage machine learning to buy and store electricity when prices are low. And when paired with Tesla’s solar panels, the system can also sell excess electricity back to the grid.
Headquarters: Auburn Hills, Michigan
Founded: 2011
What they do: CATL is a global battery manufacturing company, and one of the largest firms offering energy storage solutions. Its storage solutions range from 2.25 to 9 MWh of capacity and feature zero degradation materials that help the systems deliver consistent energy through its life cycles.
Headquarters: Palo Alto, California
Founded: 2018
What they do: Noon develops ultra-long-duration energy storage solutions. By using carbon-oxygen batteries and an advanced separation process, its storage devices are capable of holding electricity for 100 to 200 hours. Noon is also collaborating with Meta to develop a one-gigawatt, 100-gigawatt-hour storage reserve.
Headquarters: San Francisco, California
Founded: 1997
What they do: Sungrow develops energy storage solutions for clients with varying energy demands. For example, it provides liquid-cooled reserves delivering up to 7.14 MW capacities for utility companies and data centers. Additionally, it has small-scale modularly united with capacities spanning 10kWh to 40kWh that act as residential home backup solutions.
Headquarters: Pasadena, California
Founded: 1995
What they do: BYD is a provider of energy storage systems powered by safe, cobalt-free lithium iron phosphate (LFP) chemistry. The company delivers modular configurations that scale from residential backup options like the Battery-Box to massive, multi-megawatt setups for utility grids. By integrating storage with solar power generation, BYD allows residential, commercial and industrial clients to maximize self-consumption and manage peak loads.
Frequently Asked Questions
What is energy storage?
Energy storage is the process of capturing energy produced at one time for use at a later time. An energy storage system (ESS) acts as a flexible buffer for the modern electrical grid. Because electricity traditionally has to be consumed the exact moment it is generated, an ESS converts that electrical energy into a storable form, holds it safely, and converts it back into electricity on demand.
What is the difference between short-duration and long-duration energy storage?
- Short-to-medium duration storage delivers between 1 to 8 hours of energy. It typically relies on lithium-ion chemistries like lithium iron phosphate. Companies like Tesla, BYD USA, Sungrow and Fluence dominate this space, supplying immediate power to stabilize grids, manage peak loads or provide residential backup.
- Long-duration energy storage delivers 100+ hours of energy. It is designed to support the grid when renewable sources like wind or solar are offline for days at a time. Emerging tech leaders focus on alternative chemistries to achieve this sustainably.
Why are top energy storage companies shifting toward lithium ion phosphate (LFP) batteries?
LFP batteries are entirely cobalt-free, reducing supply chain risks and ethical concerns. Crucially, LFP chemistry offers far superior thermal stability, making them much safer against fire hazards, and an exceptionally long life cycle.
