Climatetech finance

Clean energy manufacturing

Metal powders help fuel rockets. Now they could heat up factories, too.

Dutch startup Renewable Iron Fuel Technology burns iron powder in boilers to make carbon-free heat. The firm just raised $131 million to commercialize its tech.

By Maria Gallucci . 9 March 2026
Climatetech finance

Heron Power raises $140M to modernize electrical transformers

Transformers are an old technology that’s in short supply. Tesla alum Drew Baglino thinks his startup can help meet rising demand with new solid-state hardware.

By Jeff St. John . 18 February 2026
Climatetech finance

Lunar Energy lands $232M to boost smart home batteries

The Silicon Valley startup wants to enter new markets, like Texas, and enroll more customers in virtual power plants that make the grid more reliable and affordable.

By Jeff St. John . 4 February 2026
Heat pumps

Startup Jetson raises $50M to deploy affordable heat pumps

The vertically integrated company says it can install heat pumps at half the costs of competitors. Now, Jetson plans to expand product offerings and service areas.

By Alison F. Takemura . 23 January 2026
Geothermal

Fervo nabs $462M to complete massive next-gen geothermal project

The Houston startup is part of a growing push to harness geothermal energy with new technologies. The funding will help Fervo finish its flagship Utah plant.

By Maria Gallucci . 10 December 2025
Solar

Connecticut’s pioneering model for publicly owned, small-scale solar

The Connecticut Green Bank goes beyond grants and loans to directly develop solar for towns and schools — a model other states could follow as energy costs rise.

By Jeff St. John . 26 November 2025
Clean aluminum

Sortera raises $45M for recycling tech as US demands low-carbon aluminum

The Indiana startup, which uses AI to extract high-value aluminum from scrap piles, just announced fresh funding and plans for a second plant in Tennessee.

By Maria Gallucci . 20 November 2025
Energy storage

This startup wants to build pumped hydro storage in the ocean

Sizable Energy raised $8M to build a demonstration plant that stores energy for long durations by pumping brine between inflatable reservoirs in the sea.

By Julian Spector . 10 November 2025
Batteries

The startup trying to make ‘DIY’ home batteries happen

Pila Energy’s batteries offer renters and homeowners the smarts of a Tesla Powerwall in a plug-and-play package. It just raised $4M to scale up operations.

By Jeff St. John . 21 October 2025
Batteries

Base Power hauls in $1B for mass deployment of huge home batteries

It’s a standout fundraise for the current cleantech market. The Texas startup will use the money to beef up manufacturing and install batteries even faster.

By Julian Spector . 9 October 2025