Top Energy Storage Startups in 2026

We at QuantumScape are working on new, advanced energy storage technology. Our company seeks to change the paradigm in energy storage by developing a completely new class of electrical energy storage device. We were backed by top VC firms (Kleiner Perkins, Khosla Ventures, Stanford), investors such as Bill Gates, partners with the world's largest car company Volkswagen, and we recently became public. QuantumScape offices are located in the center of Silicon Valley in San Jose, California at 1730 Technology Drive. Please see more at our website, quantumscape.com, and in these stories: wired.com/story/quantumscape-solid-state-battery gatesnotes.com/Energy/Moving-around-in-a-zero-carbon-world marker.medium.com/vw-one-ups-tesla-with-a-revolutionary-battery-breakthrough-…

With the launch of our flagship product, RIVER, in April 2017, EcoFlow is on track to revolutionize the way the developed and developing world interacts with power solutions. Whether you are powering a camera on a campsite, a power tool on a rooftop, an office in an RV, a water filter pump in the developing world, or preparing for the apocalypse, RIVER puts an industrial amount of power in a person’s hand. RIVER is the first of several clean, mobile, sustainable power products in development.

The product is an e-commerce website for contractors.

Joule Case is advanced power made simple. Joule Case has created an entire product platform to provide portable and backup power for all applications. Joule Case battery systems can be charged via the wall outlet or solar. Our products are ideal for providing backup power for your home, mobile business, or other facility and are sized to your unique application. Joule Case is dedicated to replacing dirty combustion generators with a clean, quiet solution that enables further solar panel applications.

ReVolt Metals focuses on sustainable lithium recovery and processing, addressing the soaring demand for lithium in the green energy transition. With advanced electro-separation technology and DOE-licensed processes, we aim to recover lithium and other metals from Li-ion batteries, establishing a closed-loop, environmentally friendly metal recovery system. Our pilot line, planned for Silicon Valley, showcases our carbon-negative Li recovery process, winner of the R&D 100 Award in 2022. Join us on this journey to commercialize advanced technologies for metal recovery and contribute to a sustainable future.

Solar, EV charging and storage installations for commercial and residential customers.

TWAICE provides predictive analytics software that optimizes the development and operation of lithium-ion batteries. TWAICE’s core technology is the digital twin - a software that combines deep battery knowledge and artificial intelligence to determine the condition and predict battery aging and performance.

Pacifico Energy (“Pacifico” and formerly “Pacifico Power”) is a forward-looking energy infrastructure platform that delivers customized industrial-scale energy solutions to data centers, companies and communities looking to quickly secure reliable and affordable electricity. Pacifico develops, constructs, operates, finances and invests in prime generation (microgrid) and distributed generation energy projects—which help data centers, commercial & industrial companies, and communities become less reliant on utility companies for electricity. Pacifico is backed by the Pacifico Energy Group, which has significant ownership stakes in energy development companies around the world, including Japan’s largest solar developer.

Ultracapacitors with * 4x higher power density * 2x higher energy density than any competitor. This means we lower the costs 50-80% by using less materials, while at the same time offering our customers 2-4x smaller and lighter devices. This will solve crucial energy storage problems by re-generating energy, that would otherwise be lost, or providing peak or backup power in transportation, renewable energy, power quality and industrial sectors. Technology based on patented materials.