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.

Electrum empowers communities to adopt sustainable technologies through transparency and choice to improve the quality of life for all people. The site walks a user through online education and a simple registration process that creates a project for certified, vetted installers to place bids on. After a set period, the bidding process ends and bid analysis is carried out through a proprietary algorithm. The final three bids selected presented in a user friendly format to allow a homeowner to understand the advantages of each bid. The homeowner then has the opportunity to select a bid on the site and e-sign a contract directly with the installer.

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.

Adiabatic Technologies Pvt Ltd is an Indian energy company building battery systems, BMS, and chargers for the industries that won't accept downtime — robotics, defence, drones, MHE, AGV, and solar. Located in Ahmednagar, we specialize in both R&D and manufacturing of advanced energy storage solutions. We are a fast-growing team working on cutting-edge technology with real-world impact, driving sustainability, and enabling global hardware innovation from India.