Top Energy Storage Startups in 2026

REbound’s refrigeration cycle provides -35C cooling to commercial freezer environments while consuming 40% less electricity than conventional vapor compression systems. Leveraging a patent-pending freeze suppression technique, REbound’s highly efficient cycle enables implementation of safer, near ambient refrigerants at a 2-year payback thus disrupting the energy-intensive vapor compression industry and capitalizing on the $1.6B commercial refrigeration equipment market.

COIL is very excited to announce that as of August 4th, we are officially part of Wallbox N.V. (NYSE: WBX). We are thrilled to formally join the Wallbox group and expand our services across the USA to accelerate the transition to electric mobility. COIL is the nationwide leader in turn-key EV charging solutions. Driven to meet ambitious zero-emission goals, COIL’s innovation bridges the gap between customer service, installation and technology to enable widespread EV adoption. COIL believes that EV installation should be a simple, efficient and seamless customer experience. Headquartered in San Francisco and Los Angeles, COIL offers residential, commercial, and enterprise solutions powered by COIL’s Unified Platform (COIL UP). We offer an array of services for manufacturers, installers, and renewable energy consumers that include Solution Design & Engineering, Program Management, EVSE Experts, Incentive Programs, and COIL iQ – the leading Renewable Services Software Platform.

Energy Vault SA offers an energy storage technology utilizing fundamental principles of science to deliver a storage solution that's as compassionate to the planet as it is efficient to build and operate. The Energy Vault solution utilizes the same fundamentals of physics and kinetic energy as pumped hydro but replaces the water with custom made cylindrical blocks utilizing an extremely innovative use of low-cost materials. The system is modular and can be designed with a capacity of between 10 and 35MWh and a power output of up to 5MW. The system has been designed for a 30+ year life with no degradation in storage capacity.

Battery Custom Battery Pack Assemblies Chargers Stocking & KanBan Inventory

Electrify America’s investment will enable millions of Americans to discover the benefits of driving electric.

At Novele, we're on a mission to deliver scalable and cost effective resiliency solutions for the 21st century city. Whether for whole building, data center, or networking closets, energy storage is the key to future city living. The foundation of Novele is a revolutionary IoT energy storage device called Energy Board. Backed by industry leaders including the Bjarke Ingels Group, Techstars, and Ginco (UAE), among other investors in the real estate, energy, and technology space.

Empowering Aggregators with Robust Hardware & Data Infrastructure for DER Asset Management

Exowatt develops modular, dispatchable solar energy systems tailored for high-demand applications such as AI data centers. Its flagship product, the Exowatt P3, captures solar energy, stores it as heat in a thermal battery, and converts it into electricity on demand, providing up to 24 hours of continuous power. Exowatt's technology addresses the increasing energy requirements of AI infrastructure by providing a renewable, cost-effective, and reliable power solution. By integrating energy generation and storage into a single modular unit, the company aims to enhance energy efficiency and sustainability in power-intensive industries.