Energy storage

Virtual power plants

Sonnen, Solrite to offer free batteries and solar to Texas homeowners

The catch: The companies will own and use the equipment to create a virtual power plant that they are betting will pay off installation costs.

By Jeff St. John . 16 January 2025
Energy storage

Massive underground air-battery project lands $1.76B DOE award

Hydrostor wants to use the conditional loan guarantee to store up to 4,000 megawatt-hours of energy in caverns in Kern County, California.

By Jeff St. John . 13 January 2025
Batteries

2024 was a fantastic year for energy storage

Batteries reshaped the power grid in California and Texas, showing the rest of the country what's possible when the tech is allowed to flourish.

By Julian Spector . 23 December 2024
Batteries

Duke Energy to knock down coal plant and build its biggest battery yet

Large grid batteries are finally coming to North Carolina, the nation’s fourth largest solar power producer.

By Julian Spector . 3 December 2024
Clean industry

Redoxblox raises $31M to commercialize its energy storage ‘booster’

The startup says its novel thermochemical storage system is a cost-effective way to provide clean heat to fossil fuel–reliant heavy industries.

By Jeff St. John . 30 October 2024
Virtual power plants

Hundreds of New Yorkers got free batteries to help clean up the grid

A novel collaboration between solar installer Sunrun and utility Orange & Rockland shows how New York could tap household solar generation to advance climate goals.

By Julian Spector . 30 October 2024
Solar

Puerto Rico closes $861M DOE loan guarantee for huge solar-battery project

The island has ambitious climate goals and a ton of rooftop solar, but has so far built few large-scale clean energy projects. Project Marahu could change that.

By Akielly Hu . 15 October 2024
Batteries

A Massachusetts town uses batteries to help its grid — and its schools

Batteries can serve double-duty, shoring up the grid and providing backup to buildings when the power goes out. This project shows how.

By Jeff St. John . 7 October 2024
Energy storage

Chart: More and more rooftop solar buyers are adding home batteries

The uptick in home battery installations is yet another sign that the era of battery storage has arrived in the U.S.

By Dan McCarthy . 4 October 2024
Transmission

Why won’t PJM let batteries and clean power bolster a stressed-out grid?

The country’s biggest grid operator is preventing developers from adding batteries to existing projects that have extra grid space, in defiance of a federal mandate.

By Jeff St. John . 3 October 2024