EarthEn

Long-Duration Energy Storageearthen.energy

EarthEn builds supercritical CO2-based long-duration energy storage systems, including grid-scale Pods and industrial Heat Batteries, serving utilities, renewable developers, and process industries with 4-100+ hour discharge capabilities.

Company typePrivate
Founded2021
HeadquartersPhoenix, United States
Headcount1–10
GTM typeB2B
OfferingHardware or Manufacturing

What EarthEn does

EarthEn is a Phoenix, Arizona-based clean energy hardware company founded in 2021 that develops supercritical CO2 (sCO2) thermomechanical energy storage systems for long-duration grid and industrial heat applications. Its core technology operates on a pumped-heat/pumped-thermal electricity storage architecture that charges by compressing and heating CO2 into a supercritical state and discharges via a turbine-generator, avoiding the use of lithium, rare earths, or other constrained supply-chain inputs. The company markets two product lines: EarthEn Pods, modular grid-scale storage delivering 4 to 100+ hours of discharge, and the Heat Battery, a 200–500°C industrial thermal storage unit offering 4–12 hours of discharge at roughly 90% round-trip efficiency, targeted at process industries such as cement, steel, chemicals, and food processing.

The company's go-to-market centers on commercial pilots and large industrial customers rather than residential deployment; its first announced commercial pilot is with Brisa Energy in Utah for 2026, supported by Utah's Office of Energy Development. Revenue mechanics are anchored on long-duration storage and thermal storage hardware sales plus associated service contracts, with a stated 30-year operational life per unit creating an annuity-like after-sales economics. EarthEn pursues grant co-funding (DOE HPC4EI, NSF SBIR) and accelerator partnerships (Plug and Play, Rice Alliance, Innovation Crossroads at ORNL, Momentum Capital) to defray capital costs while building commercial traction. Customer segments explicitly targeted include utilities, renewable developers, industrial heat users, and increasingly AI/data-center operators whose load growth is driving new long-duration storage demand.

EarthEn firmographics

Firmographics

Name: EarthEn
Legal name: EarthEn Energy
Website: https://earthen.energy
Company type: Private
Founded year: 2021
Operating status: Operating
Headcount range: 1–10 employees
Short description: EarthEn builds supercritical CO2-based long-duration energy storage systems, including grid-scale Pods and industrial Heat Batteries, serving utilities, renewable developers, and process industries with 4-100+ hour discharge capabilities.
Ownership category
akta.pro rank

EarthEn industry classification

Industry

Product category: Long-Duration Energy Storage
NAICS: Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Power Boiler and Heat Exchanger Manufacturing (33241)
SIC: Industrial Process Furnaces & Ovens (3567), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)
akta.pro primary industry: Underground & Geothermal Thermal Storage (ATES/BTES/CTES, Borehole Fields) (EUAFANAG)
akta.pro secondary industries: Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP) (EUABAJAI), SCADA/Telemetry, Data Integration & Device Connectivity for Storage/DER Control (EUAFAKAI)

Keywords

Long-duration energy storage
Thermal energy storage
Industrial heat decarbonization
Grid-scale storage systems
Pumped heat technology

Where EarthEn is headquartered

Location

Headquarters

HQ city: Phoenix
HQ country: United States
HQ region: North America

Offices3 records

Markets served

EarthEn business model

Business model

GTM type: B2B
Offering type: Hardware or Manufacturing
Cost components: Technology or R&D, Supply Chain, Personnel, Operations, Marketing or Sales

Revenue model

EarthEn Pods (Energy Storage Systems): Sale of sCO2-based pumped heat energy storage systems for grid-scale applications. Systems sold to utilities, grid operators, and large energy consumers requiring long-duration storage (4-100+ hours) with 30+ year operational life.
Heat Battery Systems: Sale of containerized, modular heat battery units delivering industrial-grade heat (200-500°C) for decarbonization of hard-to-abate industries including food, pharmaceuticals, textiles, and pulp & paper.
Pilot and Demonstration Programs: Commercial pilots launching in 2025 including heat battery demo in Utah, establishing proof points for future commercial deployments.
Grant Funding (Non-dilutive): DOE and NSF grants supporting R&D and technology development. Includes Innovation Crossroads ($400K), NSF STTR, DOE HPC4EI, Office of Electricity support, CalSEED, and various matching funds.

Pricing tiers

Model	Billing	Price
Other	Multi-year contract	EarthEn Pods - Grid-scale energy storage systems

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

EarthEn product offering

Product offering

Core offering

EarthEn develops and sells sCO2-based pumped-heat thermo-mechanical energy storage systems for grid-scale long-duration storage (4-100+ hours) and industrial heat decarbonization (200-500°C). The company offers two main product lines: EarthEn Pods for grid operators and utilities, and Heat Battery units for hard-to-abate industrial sectors including food, pharmaceuticals, textiles, and pulp & paper.

Product overview

EarthEn offers two main product lines: EarthEn Pods (sCO2 Pumped Heat Energy Storage for grid-scale long-duration energy storage from 4-100+ hours) and the Heat Battery (industrial-grade thermal energy storage delivering 200-500°C heat for decarbonization of hard-to-abate industries). Both products use supercritical CO2 in closed-loop thermo-mechanical systems, share common technology foundations for safety and scalability, and can operate independently or together to provide flexible storage and industrial heat solutions.

Differentiator

Problem solved

Functional benefit

Brands

EarthEn Pods: sCO2-based pumped heat energy storage solution for 4-100+ hours of flexible energy storage with 30-year operational life
EarthEn Heat Battery

Products and services

EarthEn Pods sCO2 Pumped Heat Energy Storage system that uses CO2 in a closed loop to store 4-100+ hours of energy at low cost in a highly scalable and safe manner with a 30-year operational life. Features independent scaling of power and energy with MW-scale building blocks. Designed for grid operators, utilities, and large energy consumers requiring long-duration storage.
EarthEn Heat Battery

Quantifiable outcome

Storage duration: 4-100+ hours of energy
+4 more outcomes

Companies that use EarthEn

Customer profile

Segments4 records

Ideal customer profiles3 records

EarthEn technology and API

Technology

Technology focussed Yes

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature5 records

EarthEn partnerships and signals

Strategic signal

Partnerships

18 partnerships are on record, tiered major, minor and core.

Woodside Energy / Equinor Ecosystem ExchangemajorStrategic or Co-development Partner · 1 March 2026Part of Ecosystem Exchange hosting Australian and Norwegian startups to cross-pollinate with Houston energy ecosystem. Lightning pitches with Woodside Energy and Equinor teams, participation in Houston Energy and Climate Startup Week.
EPRI IncubatenergymajorStrategic or Co-development Partner · 1 November 2025Founder Manas Pathak speaking at EPRI's Incubatenergy program sharing insights on patented sCO2-based LDES technology and heat battery solutions for future grid.
EnergyTech Nexus / COPILOT PilotathonmajorStrategic or Co-development Partner · 1 September 20252025 COPILOT Accelerator participant and Charter Member of EnergyTech Nexus. Pitched and showcased technology at Pilotathon in Houston.
COPILOT Accelerator / EnergyTech NexusmajorStrategic or Co-development Partner · 1 August 2025Selected for inaugural COPILOT Accelerator by EnergyTech Nexus in partnership with Browning the Green Space and supported by Wells Fargo Innovation Incubator (IN2) at NREL. 8-month program with mentorship, pilot matchmaking, and showcase opportunities.
India Energy Storage Week (IESW) 2025majorGTM or Marketing Partner · 1 July 2025Exhibitor Partner at IESW 2025 in New Delhi, India's leading platform for energy storage, e-mobility, green hydrogen, and clean energy innovation. Showcasing innovation and connecting with global leaders.
IACMI - The Composites InstituteminorStrategic or Co-development Partner · 1 April 2025Presented at IACMI Innovation Insights webinar showcasing innovative energy storage solutions and engaging with leaders in advanced manufacturing and clean technology.
LDES Symposium by NSF EnginesmajorGTM or Marketing Partner · 1 February 2025Presented at LDES Symposium by NSF Engines: Southwest Sustainability Innovation Engine showcasing CO2-based energy storage solutions and connecting with global leaders for sustainable net-zero future.
NSF SWSIE (Southwest Sustainability Innovation Engine)majorStrategic or Co-development Partner · 1 December 2024Participated in NSF Engines panel discussing energy challenges in the Southwest. Part of SWSIE ecosystem focused on seeding sustainable economy in the Southwest.
AccelerateAZ Arizona Sustainability CohortmajorStrategic or Co-development Partner · 1 December 2024Accepted into accelerateAZ program as part of Arizona Sustainability Batch 2 for driving innovation in renewable energy.
India Energy Storage Alliance (IESA)coreStrategic or Co-development Partner · 1 August 2024Bronze membership renewal with IESA highlighting dedication to advancing energy storage technologies and commitment to industry collaboration in India.
Greentown LabscoreStrategic or Co-development Partner · 1 November 2023Showcased CO2-based energy storage solutions at Greentown Labs Climate Tech Summit. Active member participating in Ecosystem Exchange programs, pitch events, and Houston Energy and Climate Startup Week.
Oak Ridge National Laboratory (ORNL)coreStrategic or Co-development Partner · 1 August 2023Innovation Crossroads program at ORNL. CEO Manas Pathak selected as one of seven entrepreneurs in cohort 7. EarthEn receives DOE funding and support for collaborative R&D at ORNL's Knoxville, TN campus. Partnership with DOE and TVA.
Black & Veatch IgniteX 2023majorStrategic or Co-development Partner · 11 July 2023Selected for Black & Veatch's IgniteX 2023 Climate Tech Accelerator Program. Looking forward to scaling partnership and collaborating on all offerings.
Joules AcceleratormajorStrategic or Co-development Partner · 11 July 2023Part of Joules Accelerator working with partners like Duke Energy, Honeywell and others. Growing presence across Southeast region.
Rice Alliance / Rice Clean Energy AcceleratorcoreStrategic or Co-development Partner · 21 June 2023Working with Rice Alliance through Clean Energy Accelerator Cohort 3. Part of greater Houston community for clean energy transition. Future announcements expected for customer deployments and investment partnerships with Houston's largest players.
QBE Leading Cities ProgramminorStrategic or Co-development Partner · 1 June 2023Learning about working with various cities, governments and regulatory bodies to help decarbonize cities worldwide.
Plug and Play Tech CentermajorStrategic or Co-development Partner · 15 March 2023Part of Plug and Play ecosystem. Shared vision with Plug & Play Energy in decarbonizing all commercial and industrial operations. Joined Sustainability Cohort at AccelerateAZ program in partnership with Arizona Commerce Authority.
IMPEL (DOE-funded)coreStrategic or Co-development Partner · 13 March 2023Selected for DOE-funded IMPEL program (Buildings Technologies Office). Looking forward to deploying systems across various buildings and factories within the DOE ecosystem.

Scale indicators14 records

Recent moves6 records

Expansion highlights5 records

EarthEn competitors and assessment

Company assessment

Direct peers

Malta Inc. Malta develops pumped-heat energy storage using a similar thermodynamic approach to EarthEn's sCO2-based Pods, storing electricity as heat in molten salt and cold in anti-freeze. Both target grid-scale long-duration storage (8-200+ hours) and compete in the same utility/grid operator RFP market.
Energy Dome: Energy Dome's CO2 Battery uses CO2 in a closed thermodynamic cycle for long-duration energy storage, making it the closest direct competitor to EarthEn's CO2-based Pods technology. Both serve utility-scale storage with comparable duration targets.
Rondo Energy: Rondo Energy produces industrial heat batteries delivering high-temperature process heat to manufacturers, directly competing with EarthEn's Heat Battery product for industrial decarbonization in food, chemicals, and manufacturing sectors.
Antora Energy: Antora Energy builds thermal energy storage and conversion systems using carbon blocks for industrial decarbonization and grid storage. Targets the same industrial heat and utility-scale LDES customers as EarthEn.
Form Energy: Form Energy develops iron-air batteries for 100+ hour grid-scale storage, competing directly with EarthEn Pods in the utility long-duration storage market. Both target the same grid operators seeking multi-day storage at low LCOS.
Highview Power: Highview Power develops liquid air energy storage (LAES) for grid-scale long-duration applications. Targets the same utility-scale LDES RFP market as EarthEn with 4+ hour duration capabilities.
Brenmiller Energy: Brenmiller Energy provides thermal energy storage systems (bCRUSHER, bGen) for industrial process heat decarbonization. Directly competes with EarthEn's Heat Battery in food, chemical, and industrial heat markets.

Emerging players

Kraftblock: Kraftblock offers modular thermal storage using recycled steel slag for industrial heat decarbonization. Competes with EarthEn's Heat Battery for industrial process heat applications with similar modular, containerized delivery.

Broad incumbents

Siemens Energy (EES): Siemens Energy offers broad energy storage solutions including thermal and mechanical storage as part of a wider generation portfolio. Competes with EarthEn at grid scale through established utility relationships and EPC capability.
GE Vernova: GE Vernova provides gas turbine and grid-scale energy solutions including thermal storage integrations. As a major incumbent in power generation equipment, it represents the established competitive backdrop for emerging LDES players.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

EarthEn financial estimates

Financial estimate

Revenue estimate

Valuation estimate

EarthEn leadership team

Management profile

Number of profiles

Profiles3 records

EarthEn funding detail

Funding detail

Funding overview

Funding rounds6 records

Investors5 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

EarthEn M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about EarthEn

What does EarthEn do?

Is EarthEn a public or private company?

EarthEn is a private company. It is classified as venture growth investor backed and is currently operating.

When was EarthEn founded?

EarthEn was founded in 2021. It employs 1 to 10 people.

Where is EarthEn based?

EarthEn is headquartered in Phoenix, United States, in the North America region.

How does EarthEn make money?

Four revenue lines are on record. EarthEn Pods (Energy Storage Systems) is the primary driver. The others are heat Battery Systems, pilot and Demonstration Programs and grant Funding (Non-dilutive).

Who are EarthEn's main competitors?

Direct peers on record are Malta Inc., Energy Dome, Rondo Energy, Antora Energy, Form Energy, Highview Power and Brenmiller Energy. Kraftblock is listed as an emerging player. Broad incumbents are Siemens Energy (EES) and GE Vernova.

Does EarthEn have an API?

No public API is recorded for EarthEn.

What industry is EarthEn in?

EarthEn's product category is Long-Duration Energy Storage. Its primary akta.pro industry code is EUAFANAG, Underground & Geothermal Thermal Storage (ATES/BTES/CTES, Borehole Fields), with a secondary code of EUABAJAI, Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP). Its NAICS code is 333415 and its SIC code is 3567.