New and recently funded Energy Startups
1
Country: Italy | Funding: $166.9M
Energy Dome develops a low-cost and efficient system for long-duration electricity storage using liquid CO2. Its CO2 Battery Plus technology aims to improve the efficiency and flexibility of gas-fired power generation by combining energy storage with waste heat recovery. The CO2 Battery technology stores energy by compressing CO2. In the conventional setup, both pressure and heat generated during charging are stored separately: heat in a thermal storage system for later use during discharging.
Energy Dome develops a low-cost and efficient system for long-duration electricity storage using liquid CO2. Its CO2 Battery Plus technology aims to improve the efficiency and flexibility of gas-fired power generation by combining energy storage with waste heat recovery. The CO2 Battery technology stores energy by compressing CO2. In the conventional setup, both pressure and heat generated during charging are stored separately: heat in a thermal storage system for later use during discharging.
2
Country: USA
Solatube develops system for bringing natural daylight into buildings. Its tubular daylighting device (TDD) is a compact and airtight alternative to traditional skylights, minimizing glare and solar heat gain. Solatube's tubular daylighting systems are modular and can be installed in hard-to-reach spaces and rooms, bypassing obstacles that skylights and windows simply cannot reach. They also provide ventilation and beautifully illuminate interiors, improve productivity and well-being, and reduce energy costs. Solatube provides a full range of consulting services for commercial properties, from design to installation, and is developing global distribution in over 100 countries. Acquired by Kingspan Light & Air USA
Solatube develops system for bringing natural daylight into buildings. Its tubular daylighting device (TDD) is a compact and airtight alternative to traditional skylights, minimizing glare and solar heat gain. Solatube's tubular daylighting systems are modular and can be installed in hard-to-reach spaces and rooms, bypassing obstacles that skylights and windows simply cannot reach. They also provide ventilation and beautifully illuminate interiors, improve productivity and well-being, and reduce energy costs. Solatube provides a full range of consulting services for commercial properties, from design to installation, and is developing global distribution in over 100 countries. Acquired by Kingspan Light & Air USA
3
Country: Ireland | Funding: €224M
UrbanVolt is a leading provider of clean solar energy in the UK and Ireland. The company finances, installs, and maintains solar power systems for businesses, schools and residential customers. Its Solar as a Service option provides businesses with access to rooftop solar panels without any upfront costs or complications. UrbanVolt covers the costs, design, installation, and maintenance, allowing them to pay only for the energy consumed. A mobile app and desktop platform allow customers to track solar panel performance in real time, monitor energy production, and stay informed about their environmental impact. The Power Purchase Agreement (PPA) is consumption-based, meaning customers pay only for the electricity they consume at a fixed price.
UrbanVolt is a leading provider of clean solar energy in the UK and Ireland. The company finances, installs, and maintains solar power systems for businesses, schools and residential customers. Its Solar as a Service option provides businesses with access to rooftop solar panels without any upfront costs or complications. UrbanVolt covers the costs, design, installation, and maintenance, allowing them to pay only for the energy consumed. A mobile app and desktop platform allow customers to track solar panel performance in real time, monitor energy production, and stay informed about their environmental impact. The Power Purchase Agreement (PPA) is consumption-based, meaning customers pay only for the electricity they consume at a fixed price.
4
Country: USA
AES Distributed Energy builds solar power plants with energy storage for commercial and residential customers. The company provides a full range of services, including design and energy efficiency consulting, permitting, plant construction, solar panel installation, commissioning, grid connection, and system monitoring. Most installations take just a few days. Customers can track solar energy production and see savings in real time.
AES Distributed Energy builds solar power plants with energy storage for commercial and residential customers. The company provides a full range of services, including design and energy efficiency consulting, permitting, plant construction, solar panel installation, commissioning, grid connection, and system monitoring. Most installations take just a few days. Customers can track solar energy production and see savings in real time.
5
Country: Netherlands | Funding: €36.4M
Hardt develops and supplies high-tech transport capsules and propulsion solutions for Hyperloop projects worldwide. Propulsion solutions include all active components required on the vehicle and infrastructure for magnetic levitation, control, propulsion and lane switching. The company has also developed an open specification for passive infrastructure and established the European Hyperloop Center, an open center where Hardt, along with other developers test Hyperloop vehicles. This center serves as a hub for refining and validating open specifications, allowing various stakeholders to contribute to the ongoing development of Hyperloop technology.
Hardt develops and supplies high-tech transport capsules and propulsion solutions for Hyperloop projects worldwide. Propulsion solutions include all active components required on the vehicle and infrastructure for magnetic levitation, control, propulsion and lane switching. The company has also developed an open specification for passive infrastructure and established the European Hyperloop Center, an open center where Hardt, along with other developers test Hyperloop vehicles. This center serves as a hub for refining and validating open specifications, allowing various stakeholders to contribute to the ongoing development of Hyperloop technology.
6
Country: USA | Funding: $599M
Valar Atomics develops small modular nuclear reactors (SMNRs) using proven high-temperature gas reactor (HTGR) technology combined with safe TRISO fuel. HTGRs are optimized to produce high-quality process heat which is used for industrial and chemical applications, providing nearby partners with affordable, abundant and clean energy. Using TRISO-coated fuel particles and helium coolant, the HTGRs passively remove decay heat without active systems or operator intervention. This design minimizes the risk of core damage even in severe accident scenarios. The company plans to mass-produce the reactors and deploy them at so-called gigasites, where they will power AI data centers, industrial facilities, and other customers.
Valar Atomics develops small modular nuclear reactors (SMNRs) using proven high-temperature gas reactor (HTGR) technology combined with safe TRISO fuel. HTGRs are optimized to produce high-quality process heat which is used for industrial and chemical applications, providing nearby partners with affordable, abundant and clean energy. Using TRISO-coated fuel particles and helium coolant, the HTGRs passively remove decay heat without active systems or operator intervention. This design minimizes the risk of core damage even in severe accident scenarios. The company plans to mass-produce the reactors and deploy them at so-called gigasites, where they will power AI data centers, industrial facilities, and other customers.
7
Country: USA | Funding: $50.4M
Swift Solar is developing lightweight, flexible, and highly efficient solar panels based on perovskite tandem semiconductors. The company says it has improved perovskite stability by >100x: it's cells can operate over 3,000+ hours with no degradation. Swift's intellectual actives include unique patent-protected solar cell materials, architectures and manufacturing processes for high-performance and stable perovskite products. The company has own manufacturing facility in the USA
Swift Solar is developing lightweight, flexible, and highly efficient solar panels based on perovskite tandem semiconductors. The company says it has improved perovskite stability by >100x: it's cells can operate over 3,000+ hours with no degradation. Swift's intellectual actives include unique patent-protected solar cell materials, architectures and manufacturing processes for high-performance and stable perovskite products. The company has own manufacturing facility in the USA
8
Country: USA | Funding: $4M
Arinna builds ultrathin solar panels specifically for spacecraft. Its technology is based on a new material - transition metal dichalcogenides that are atomically thin semiconductors. This technology allows for extremely flexible cells that the company claims are cheaper, more durable than legacy space solar panels and 32% more efficient. Arinna’s technology also won’t require protective coverings, will last 15 years on orbit, and can be delivered within weeks. The company expects to have its first products being tested on orbit before the end of 2026. After qualifying their photovoltaics in space, the company hopes to build a facility that can mass produce the stuff at megawatt scale in 2028.
Arinna builds ultrathin solar panels specifically for spacecraft. Its technology is based on a new material - transition metal dichalcogenides that are atomically thin semiconductors. This technology allows for extremely flexible cells that the company claims are cheaper, more durable than legacy space solar panels and 32% more efficient. Arinna’s technology also won’t require protective coverings, will last 15 years on orbit, and can be delivered within weeks. The company expects to have its first products being tested on orbit before the end of 2026. After qualifying their photovoltaics in space, the company hopes to build a facility that can mass produce the stuff at megawatt scale in 2028.
9
Country: USA | Funding: $39.7M
Claros creates power management platform for data centers that utilizes cutting-edge hardware, software to enhance their energy efficiency and enable sustainable high-performance computing.
Claros creates power management platform for data centers that utilizes cutting-edge hardware, software to enhance their energy efficiency and enable sustainable high-performance computing.
10
Country: USA | Funding: $150M
Arc Boats builds hybrid electric vessels: tugs, ferries, and electric motors for autonomous defense boats (ensuring stealth). Its integrated electric systems combine the propulsion system, energy storage, and software into a single, coherent platform. The electric motor delivers high instantaneous torque and flexible speed control for precise control in port, reducing downtime and lowering operating costs. They ensure efficient charging and more environmentally friendly operation for busy, repetitive schedules. Without fuel systems or complex transmissions, the electric propulsion system minimizes maintenance and downtime.
Arc Boats builds hybrid electric vessels: tugs, ferries, and electric motors for autonomous defense boats (ensuring stealth). Its integrated electric systems combine the propulsion system, energy storage, and software into a single, coherent platform. The electric motor delivers high instantaneous torque and flexible speed control for precise control in port, reducing downtime and lowering operating costs. They ensure efficient charging and more environmentally friendly operation for busy, repetitive schedules. Without fuel systems or complex transmissions, the electric propulsion system minimizes maintenance and downtime.
