Energy Startups

SeaTwirl develops floating vertical-axis wind turbines designed for deep-water offshore environments, integrating the turbine and foundation into a single unit for easier building, installation, and maintenance. It targets markets such as oil and gas platforms, islands, remote seaside villages, wind farms, and fish farms that currently rely on diesel generators.

1 investor

SECS develops control solutions for hybrid renewable energy generation plants that combine multiple renewable sources, storage systems, and complementary infrastructure. The company offers a proprietary Power Plant Controller and technology consulting services for utility-scale and off-grid installations.

1 investor

SeekOps builds TDLAS-based methane, carbon dioxide, and 3D temperature sensing hardware (the SeekIR sensor suite) with reporting services for operators in traditional and renewable energy. Originally developed at NASA's Jet Propulsion Laboratory, its technology is used for emissions measurement across energy operations worldwide.

1 investor

Sein Industries develops AI surrogate models and custom numerical simulation software that combines deep learning with classical computational methods for industrial engineering and manufacturing. The company enables manufacturers to predict structural and thermal behavior and explore designs rapidly while respecting production constraints like Design for Manufacturability.

1 investor

Markoma Women Farmer Producer Company is a farmer producer organization (FPO) of over 460 vegetable growers in Rayagada, Odisha, India, supported by Harsha Trust. The FPO operates a solar-powered 5 MT cold storage facility that serves both member farmers and local vendors, enabling produce preservation and stabilized market access at a fixed rental rate of INR 2 per kg.

1 investor

Selection-EnR provides communication gateways and remote management (télégestion) systems for industrial supervision of renewable energy producers and electricity consumers connected to the French medium-voltage (HTA) grid. Its systems process real-time site measurements and remotely control installations to modulate power injected or drawn from the grid, helping operators monetize flexibility through national market mechanisms and local grid flexibility programs.

1 investor

Select Water Solutions provides end-to-end water and chemical management services for oil and gas operators, including water infrastructure, logistics, and specialty chemical technologies across unconventional basins in the United States. The company operates water treatment facilities, disposal wells, and chemical manufacturing operations to support oilfield operations.

1 investor

Selenite Energy Partners provides structured capital solutions—such as drilling joint ventures, royalty and mineral acquisitions, and bespoke financing—to public and private operators in the North American energy sector. The firm focuses on upstream, midstream and oilfield service opportunities, targeting de-risked, producing or development-ready assets.

1 investor

Semikron Danfoss develops power electronics and semiconductor solutions for industrial applications, with a focus on enabling customer decarbonization and advancing circular economy principles. The company is committed to carbon neutrality in its operations by 2030 and embedding sustainability across product development, manufacturing, and supply chain management.

1 investor

SemperPower integrated renewable energy with large-scale battery systems. The company's legacy continues at Return, which builds carbon-free energy infrastructure for Europe.

1 investor

Sempra Infrastructure develops, builds, and operates energy infrastructure across North America, supporting the global energy transition. The company focuses on energy systems with an emphasis on sustainability, safety, and social responsibility.

1 investor

Senergetics develops solutions for asset management and energy efficiency optimization.

1 investor

Global IoT connectivity provider offering a Network-as-a-Service approach for connecting IoT devices at scale.

1 investor

SenseHawk offers a map-based, geospatial software platform that manages solar and battery storage projects across development, construction, and operations, replacing spreadsheets and disconnected tools with a single source of truth. It serves solar EPCs and developers managing utility-scale portfolios, with features including drone analytics, thermal inspections, task management, inventory tracking, and an AI copilot for solar data.

1 investor

Sensmet develops online process analyzers for continuous monitoring and control of liquid samples in industrial applications. The company's patented Micro-Discharge Optical Emission Spectroscopy (µDOES®) technology enables multi-metal analysis of aqueous samples, with critical applications in battery metal monitoring during production and recycling.

1 investor

Sentinel develops and operates data centers—primary production and failover facilities totaling over 3 million square feet across the United States—serving Fortune 500 companies and hyperscale cloud, AI, financial services, healthcare, technology, media, and biotechnology sectors.

1 investor

SEOS International provides commercial lighting services including lighting concepts, detailed designs, supply of fixtures, logistics, and on-site installation supervision and commissioning. It works with hospitality and commercial clients such as hotels, resorts, and airports, acting as an outsourced team of lighting experts across their projects.

1 investor

SepFluor is a South African fluorspar producer focused on mining and supplying acid grade and metallurgical grade fluorspar (CaF2), an industrial mineral used in chemical, metallurgical and ceramic processes including refrigerants, aluminium smelting, nuclear power and EV battery electrolytes. The company operates in the mining and critical minerals sector.

1 investor

Sepia Infrastructure develops, finances, and operates large industrial parks and associated low-carbon energy infrastructure to host hyperscale data centres and other energy-intensive operators. It provides turnkey services across Europe covering site selection, permitting, grid connection, energy solutions, and long-term campus operations.

1 investor

SerenySun develops large-scale renewable energy communities in urban and peri-urban areas, using individual and collective self-consumption to share locally produced green electricity among public authorities, businesses, and individuals. Operating in France, it works with local governments, real estate players, and companies to make local green energy accessible to participants who may not have their own solar production.

1 investor

Serimax provides tailored welding solutions including engineering, manual and automatic welding, procedure qualification testing, and welder training for industrial projects. The company offers full-service project delivery with welding, non-destructive examination, and field joint coating services, supported by operational logistics and on-site commissioning.

1 investor

Serraverde is a rare earth elements (REE) provider that produces and supplies essential materials for advanced technologies in sectors including renewable energy, transport, medical devices, and defense. The company focuses on developing responsible supply chains and enabling the creation of new value chains dependent on rare earth elements.

1 investor

Service Compression is a contract compression service provider that operates and maintains natural gas compression equipment for oil and gas producers across major U.S. basins. The company serves upstream and midstream operators with a fleet of compression units ranging from 80 to 2,500 horsepower, emphasizing reliability, predictive intelligence, and 24/7 field support.

1 investor

Sesame Solar develops mobile nanogrids that provide off-grid, fuel-independent power for defense, emergency response, and commercial operations. The company targets critical infrastructure and mission-critical users requiring rapid deployment and energy resilience.

1 investor