Tesla's solar roof was an experiment that never really caught on for the company. But does that mean the concept of roof-integrated solar is dead?

Fusion power startup Inertia Enterprises reduced the fuel filling process from a week to just a few hours. It's one of 10 hurdles the company must overcome to make a profitable power plant.

Y Combinator alumnus Apollo Atomics is shrinking a key nuclear reactor part, which promises to slash the cost of electricity below natural gas.

TerraPower's nuclear power plant possesses a strategic advantage over competitors, especially when chasing after data center deals.

Companies including Tesla and Base Power are vying for a piece of the rapidly growing market for home batteries. One technology has made it all possible.

Battery materials startup Anthro Energy has broken ground on a Louisville factory to make electrolytes, including those for solid-state batteries.

Sonic Fire Tech raised its new funding to help get its sound-powered fire protection system into everything from commercial kitchens to apartment buildings.

Nvidia's investment in SoftBank's data center developer will guarantee its chips power an OpenAI data center.

Fusion startups have raised $7.1 billion to date, with the majority of it going to a handful of companies. 

Natural gas prices could triple in some parts of the U.S., which could saddle hyperscalers with massive bills to power their AI data centers.

Tesla wants to build a massive solar factory in Texas, but first it wants the state to chip in to defray the costs.

Form Energy has landed Google and Crusoe as customers. Now, it has raised $750 million to expand manufacturing to deliver its massive, 100-hour batteries.

Reservoir has built an ultra-efficient water heater that can predict hot water demand, store energy, and detect plumbing leaks throughout a home.

Fusion power startups are turning to Kyoto Fusioneering to supply components for future power plants. The Japan-based startup just received a grant to build a part of the fuel system.

Battery materials startup Sila will use a $1.4 billion loan from the U.S. Department of Defense to scale production at its factory in Washington state.