A Leading Provider of Next-Generation Batteries and Power Solutions

Enpower Greentech

World class battery experts

Founded in 2012, Enpower Greentech, Inc. develops ultra-high energy density solid-state batteries with customer validation through OEMs and blue-chip electronics companies.

Backed by customers and investors like SoftBank and Sequoia, it has a 2023 commercialization timeline for Drones with a mid-term strategy for the eVTOL and EV markets.

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Enpower Energy EGI Engineer
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Our Technologies

Enpower conducts research and development on next-generation batteries, including Lithium Metal and All-Solid-State Batteries, along with their key materials, in service of a carbonfree future.

Sulfide Materials

  • Solid electrolyte materials

  • Sulfide-based solid state electrolytes and their precursors

  • Foundational patents on LGPS (super-ionic conductor) based materials and batteries, licensed from the Tokyo Institute of Technology

Lithium Metal Batteries

  • Cell energy density > 500Wh/kg@1100Wh/L, verified by SoftBank Corp. and multiple third-parties

  • Proprietary lithium interface and novel electrolyte separator solution to achieve good cycle life without compromising safety

All-Solid-State Batteries

  • Lab prototype cells of Lithium Metal ASSB demonstrated superior performance in charge-discharge rates (at 10°C), operating temperature range (-40℃ to 100℃), with cycle life >1000

  • Ah-class pouch cells coming soon for external testing


Enpower Greentech works closely with early partners and clients to develop application specific solutions through Joint Development Agreements progressing through A, B, and C samples that lead to commercialization and mass production.

  • Record setting energy density and power

  • Greater storage & lighter weights for longer range

  • All around improved performance for EV companies that care about quality


Providing EV clients with higher performance metrics through proprietary materials including: lithium metal anodes and silicon graphite using custom electrolytes and cathode systems.

  • High rate, continuous discharge ≥5C, 10C pulse discharge

  • Record setting energy density and power

  • First priority safety ensuring your eVTOL stays aloft longer


Providing high and safe discharge rate performance to deliver ample output power for vertical take-off and at landing that leads to overall improved driving experiences and safety.

  • Offering both high energy and high power-type drone applications

  • Combined high-energy/power applications for drones, power tools and other niche power demands


Flexible drone battery and pack production lines cover cell capacities from 3.5Ah to 33Ah with cell energy density ranges from 370 to 550 Wh/kg and high discharge rates (with flexible power solutions for clients)

  • Superionic conductor sulfide-based solid electrolyte with ionic conductivity at 1x10-2 S/cm levels

  • Promoting industry development and the solid-state battery ecosystem


Enpower Greentech partners to provide solid electrolyte materials commercially. Learn more about competitive pricing and supply for high performance Li2S, SnS2, SiS2, GeS2 and more.

  • Global operations (EU-US-Asia) enable our competitive TCO

  • Reliable and safe batteries and system solutions including battery and energy management systems (BMS, EMS, PCS)

Enpower Greentech was founded on solar photovoltaic and energy storage systems offerings for off-grind, commercial and industrial use. Since then, our portfolio and the market has adopted residential level ESS applications. We offer and consult for eco-friendly product life cycle management with turn-key solutions.

I am pleased to see the excellent work of the Enpower Greentech and SoftBank team on the development of advanced battery technologies and on applications that contribute to the SDGs (Sustainable Development Goals). My research team is honored to contribute to this worthwhile effort from a fundamental materials science perspective, and I wish the Enpower Greentech and SoftBank team every success in this endeavor."
Professor, John B. Goodenough Nobel laureate in Chemistry a.k.a. the “Father of the Lithium-Ion Battery”

Latest News

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Featured in Nikkei

May 15th, 2023

Posted in Nikkei #nikkei #japan #lithiumbatteries

"Japanese subsidiary to the USA: Enpower Greentech (EGI), Japan (Minato, Tokyo) will commence factory operations in Yokohama City for lithium metal batteries that are 50% lighter than conventional batteries in the fall of 2023. #greentech ...

Article translated from Nikkei by Sunta Toya.

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SoftBank entwickelt Lithium-Metall-Batteriepack

April 22nd, 2023

Das japanische Unternehmen „SoftBank Corp.“ hat die Entwicklung eines Batteriepacks für den Einsatz in Höhenplattformen für die kabellose Kommunikation bekanntgegeben. Das Pack enthalte Lithium-Metall-Batteriezellen des Herstellers „Enpower Japan“ mit einer spezifischen Energie von 439 Wattstunden pro Kilogramm. Anfang 2023 hatte SoftBank zusammen mit der Tochtergesellschaft HAPSMobile einen Zyklustest des Akkupacks in der Stratosphäre vorgenommen.

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Enpower Greentech's Battery Achievement Announced in SoftBank News Release

March 30th, 2023

SoftBank Corp. develops battery pack with Enpower Greentech's next-generation battery cells and successfully demonstrates operation in the stratosphere.

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Enpower Greentech Achieved Breakthrough in Cylindrical Batteries

November 3rd, 2022

Enpower Greentech Inc. has successfully developed a 4095mAh cylindrical battery, delivering industry leading energy densities of 389Wh/kg and 888Wh/L. This development has resulted in a new energy density record in the class of rechargeable 18650 cylindrical batteries.

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Enpower Greentech's work was cited by scientific papers Nature.com

October 5th, 2022

Enpower Greentech's work was cited by scientific reports, the article number is 16672(2022). You can see the detail at nature.com

The article quoted with “SofBank Corp. & Enpower Greentech Inc. SofBank Corp. Enpower Greentech Successfully Verify 450+ Wh/kg Energy Density Battery and Succeed in Development of Core Technologies for Longer Battery Life. softbank.jp (2021). Accessed June 30 2022.”

Enpower Greentech’s 100Ah lithium metal battery is reported by Digitimes

August 17th, 2022

The exponential demand for batteries worldwide drives technology advancements. As a result, making batteries that hold higher energy density has become the industry's collective aspiration. The US-based Enpower Greentech is reaching the goal with its lithium metal anode-based batteries, aiming to start production in 2023.

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Get in Touch

Learn more about EGI's record setting batteries.

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United States

Enpower Greentech Inc. Tech Center

600 S Wagner Rd,
Ann Arbor, MI 48103

Enpower Greentech Inc. Headquarter

75 E Santa Clara St.
Suite 900
San Jose, CA 95113


Enpower Japan Corp. HQ

Shinagawa Intercity A-28
2-15-1 Konan, Minato-ku
Tokyo 108-6028

Enpower Japan Corp. LAB

Tokyo Institute of Technology
J3-611, 4259 Nagatsuta-cho
Midori-ku, Yokohama
Kanagawa 226-0026


Enpower Technology Co.

13, Area 2, Jinsheng Street,
Daxing District, Beijing


Enpower Energy Technology Deutschland GmbH

Amalie-Baader-Str. 2
76137 Karlsruhe