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Series D Energy Companies

Explore 23 energy startups that raised series d funding. Access verified founder contact information and fundraising data.

Total Companies
23
Total Funding
$2.6B
Avg Funding
$113.0M
Cities
20

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Everett, United States
$130.0M
raised

Zap Energy is developing compact fusion power that doesn't require magnets or lasers.

Sep 2024
Series D

Founder Contacts

30,000+ verified contacts

Shibaura, Japan
$70.6M
raised

Terra Charge offers EV charging infrastructure business, EV charger installation proposals, installation work, operation, and maintenance.

Aug 2025
Series D

Founder Contacts

30,000+ verified contacts

Los Angeles, United States
$64.0M
raised

Nanotech Energy is a supplier of graphene, graphene oxide, and graphene supper batteries.

Aug 2021
Series D

Founder Contacts

30,000+ verified contacts

North Kingstown, United States
$5.0M
raised

Clarke Valve is a developer of energy-saving shutter valves designed to work in a variety of industrial and aerospace applications.

Jul 2022
Series D

Founder Contacts

30,000+ verified contacts

Scottsdale, United States
$130.0M
raised

Source is a developer and manufacturer of solar-powered devices designed to extract drinkable water from the atmosphere.

Jul 2022
Series D

Founder Contacts

30,000+ verified contacts

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San Francisco, United States
$55.0M
raised

OhmConnect provides a software based powerplant which assists users in reducing their use of electricity.

Jun 2022
Series D

Founder Contacts

30,000+ verified contacts

Westborough, United States

Ascend Elements manufactures sustainable battery materials using elements from discarded lithium-ion batteries.

Jun 2025
Series D

Founder Contacts

30,000+ verified contacts

Seattle, United States
$2.4M
raised

Teichos Energy specializes in renewable energy solutions including the development of solar, wind and geothermal energy.

May 2026
Series D

Founder Contacts

30,000+ verified contacts

Seattle, United States
$125.0M
raised

Booster is a fleet management company that specializes in delivering renewable fuels, gasoline, diesel, and bio-diesel delivery services.

May 2022
Series D

Founder Contacts

30,000+ verified contacts

Mountain View, United States
$102.0M
raised

Lunar Energy powers homes around the world with endless clean energy.

Feb 2026
Series D

Founder Contacts

30,000+ verified contacts

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San Francisco, United States
$200.0M
raised

Aurora Solar is a SaaS company that uses aerial imagery to assess solar installation projects.

Feb 2022
Series D

Founder Contacts

30,000+ verified contacts

Houston, United States
$100.0M
raised

Utility Global is an off-gas-to-value company that reduces emissions and improves energy efficiency through clean energy generation systems.

Feb 2026
Series D

Founder Contacts

30,000+ verified contacts

Woodinville, United States
$463.0M
raised

Group14 Technologies is a commercial manufacturer and supplier of advanced silicon battery technology.

Aug 2025
Series D

Founder Contacts

30,000+ verified contacts

Nunawading, Australia
$79.0M
raised

RayGen is building lowest cost, long duration solar + storage to deliver the economics of pumped hydro with the flexibility of batteries.

Apr 2025
Series D

Founder Contacts

30,000+ verified contacts

Philadelphia, United States
$35.0M
raised

ConnectDER is a solar technology company developing meter collars to connect distributed energy resources to the home and the grid.

Dec 2024
Series D

Founder Contacts

30,000+ verified contacts

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Seattle, United States
$61.1M
raised

LevelTen Energy is an energy company that provides renewable transaction infrastructure for buying or selling renewable energy and assets.

Jul 2024
Series D

Founder Contacts

30,000+ verified contacts

Yokohama, Japan
$7.6M
raised

Nature specializes in the development, manufacturing, and sales of IoT devices, along with offering energy management solutions.

Jun 2024
Series D

Founder Contacts

30,000+ verified contacts

Oxford, United Kingdom
$31.8M
raised

Reactive Technologies delivers the world's most accurate grid measurement tools, making renewable grids possible.

May 2024
Series D

Founder Contacts

30,000+ verified contacts

Freiburg, Germany
$32.1M
raised

NexWafe will supply high quality wafers to solar cell producers.

May 2023
Series D

Founder Contacts

30,000+ verified contacts

Planegg, Germany
$40.9M
raised

Electrochaea develops a commercially viable and disruptive solution for utility-scale energy storage, grid balancing, and carbon reuse.

Jan 2022
Series D

Founder Contacts

30,000+ verified contacts

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Hayward, United States
$80.0M
raised

Blue Current manufactures advanced solid-state batteries for electric vehicles, consumer electronics, medical, and IoT devices.

Dec 2025
Series D

Founder Contacts

30,000+ verified contacts

Rockville, United States
$700.0M
raised

X-energy is a nuclear energy company that develops small modular nuclear reactors and nuclear fuels for clean energy generation.

Nov 2025
Series D

Founder Contacts

30,000+ verified contacts

Redwood City, United States
$85.0M
raised

AutoGrid Systems organizes energy data and employs big data analytics to generate real-time predictions that create actionable data.

Oct 2021
Series D

Founder Contacts

30,000+ verified contacts

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