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Exergy Power Systems

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Provides commercializing integrated energy management systems for mobile and stationary application

Tokyo, JapanFounded 2011Energy
Valuation $100–500M Latest valuation · 2025
Headcount <100 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Exergy Power Systems and the history behind them.

About Exergy Power Systems

Exergy Power Systems Inc. operates as a key player in the energy storage sector, originating from research conducted at The University of Tokyo and officially founded in May 2011. The company's genesis is tied to the work from Atsushi Tsutsumi's Lab at the University's Institute of Industrial Science, with early and continued support from UTEC. Currently led by CEO Dr. Mike Musil, the firm focuses on developing and deploying advanced battery energy storage systems (BESS) and high-speed energy management systems (EMS).

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The core of Exergy's business is providing distributed backup and grid stability services. It addresses the challenges posed by the increasing integration of variable renewable energy sources like solar and wind, which can cause grid instability. The company serves two primary client types: large-scale power consumers (e.g., factories, hospitals) and grid operators, including transmission and distribution companies. Instead of only selling hardware, Exergy offers a comprehensive service model, providing flexibility services to Transmission System Operators (TSOs) by installing and operating its proprietary battery systems. This approach allows clients to enhance their energy resilience and support the transition to renewable energy without substantial upfront capital expenditure. The business model is concentrated on markets with high renewable energy penetration, such as Europe, particularly the UK and Ireland, with plans to replicate its success in Japan and other regions.

Exergy's flagship product is the "Exergy Battery®," a next-generation nickel-hydrogen storage battery. A key feature of this technology is its unique structure that facilitates rapid heat escape, enabling charge and discharge rates 20 to 200 times faster than conventional storage batteries. This lithium-free BESS is designed for high-output and continuous, rapid charge and discharge cycles. The company also offers hybrid solutions that integrate their BESS with other Distributed Energy Resources (DERs) like backup generators and fuel cells, all managed by a proprietary Digital Hybrid Controller (DHC). This system provides a robust Uninterruptible Power Supply (UPS) and enhances power quality for clients with critical Business Continuity Plans (BCP).

Source: Dealroom company data

At a glance

Status
Operational
Founded
2011
Headquarters
Tokyo, Japan
Employees
2
Open positions
None listed
Dealroom signal
58.3/100
Industry
Energy
Sub-industry
Energy Storage
Sector
Energy, Spinout, Sustainable Development Goals, Climate Tech, Building Energy Efficiency, Building Energy Management
Business model
Manufacturing
Client focus
b2b

Latest news

Press, funding announcements and product moves mentioning Exergy Power Systems.

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Funding history

10 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
LATE VCOther financing May 2026 $0 Global Brain Corporation
SERIES DOther financing Apr 2025 $1.2M $131M Undisclosed
Showing the latest 2 of 10 recorded eventsBook a demo for the full funding history →

Growth signals

Exergy Power Systems website traffic

Latest recorded traffic for Exergy Power Systems is 50 monthly website visits. Exergy Power Systems's team declined 83.3% over the past year.

Latest monthly visits50 1-year team growth-83.3%
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Similar companies

Closest operating peers by Dealroom taxonomy

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Investors

25 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A12 investors entered at this stage

  • Mitsubishi UFJ Capital
  • UTEC - The University of Tokyo Edge Capital Partners
  • Nissay Capital
  • Toyota Ventures
  • Sumitomo
  • Sparx Group
  • Toppan
  • Fuyo General Lease
  • Tokyo Gas
  • Yaskawa Electric
  • Mitsubishi Research Institute
  • K4 Ventures

Series B and later12 investors entered at this stage

  • Yamanashi Prefecture
  • Development Bank of Japan
  • Daiwa Energy Infrastructure
  • Japan Infrastructure Initiative (JII)
  • NEDO
  • Kansai Electric Power
  • Mitsubishi UFJ Trust and Banking
  • Japan Green Investment Corporation for Carbon Neutrality
  • Sumitomo Mitsui Trust Bank
  • Mizuho
  • Tokyo Bank Lease
  • Global Brain Corporation

Other known investors1 additional known investor

  • The University of Tokyo
Team profiled 3 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
3 countries with
team presence
🇬🇧 United Kingdom75%
🇯🇵 Japan12.5%
🇮🇪 Ireland12.5%
3 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Exergy Power Systems on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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