Energy storage

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

RedoxBlox thermochemical storage container units — Redoxblox uses a chemically reactive metal oxide to pack more energy into its thermochemical storage systems aimed at industrial decarbonization. (Redoxblox)

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
Virtual power plants

Xcel Minnesota looks to mimic power plants with solar and storage

The utility’s “virtual power plant” proposal taps an emerging model to replace retiring fossil fuel generation, but advocates say the devil is in the details.

By Frank Jossi . 28 August 2024
Energy storage

This startup has a plan to clean up industry: electrified bricks

Calectra is the latest startup vying to decarbonize heavy industry using thermal energy storage. Industrial heat accounts for a quarter of global energy use.

By Maria Gallucci . 26 August 2024
Energy storage

Heat-based batteries are a surprisingly versatile tool

Brenmiller Energy’s boxes of hot rocks are being deployed to turn electricity into steam heat, boost campus heat-and-power systems, and make power plants more efficient.

By Jeff St. John . 26 August 2024
Energy storage

Tesla’s battery business is booming

Though its EV business is contracting, the company's energy storage segment is growing fast, helping it reap the benefits of surging demand for batteries.

By Dan McCarthy . 24 July 2024
Solar

Puerto Rico could soon build its biggest solar and grid battery plants

A new $861M Department of Energy loan guarantee would help finance 200 MW of solar and 285 MW of grid storage — a huge boost in renewable capacity for the island.

By Akielly Hu . 22 July 2024