Energy storage

Clean energy

Google and others have committed to 24/7 carbon-free energy. What does that mean?

Here's your introduction to the hot new trend in clean-energy pledges.

By David Roberts . 12 November 2021
Video

Video: Hawaii turns to clean energy as coal power goes extinct in the state

The last coal plant in Hawaii will be replaced in part by Kapolei Energy Storage, a big new battery designed to store solar power and feed it back to the grid when it's needed most.

By Julian Spector . 25 October 2021
Video

Hawaii has a one-year deadline to ditch coal. Can it keep the lights on?

The Aloha State’s race to clean up its electricity sector makes it a real-world test case for rapid decarbonization.

By Julian Spector . 25 October 2021
Energy storage

Used EV batteries are storing solar power at grid scale — and making money at it

B2U Storage Solutions raises $10M to scale up site that sells solar power stored in Nissan Leaf batteries in California's wholesale markets.

By Julian Spector . 18 October 2021
Energy storage

SoftBank’s renewables developer just made the biggest flow battery purchase ever

The huge order is a boon for SPAC-bound manufacturer ESS and a vote of confidence in its lithium-ion alternative.

By Julian Spector . 1 October 2021
Climatetech finance

Newsletter: A palate cleanser from cleantech SPAC mania

Grid storage veteran Fluence is going public with real products and revenue.

By Julian Spector . 29 September 2021
Climatetech finance

Energy storage leader Fluence preps for old-school IPO, bucking SPAC trend

The grid-scale battery sector is poised for massive growth. Fluence is playing a major role — but it has a lot of competition.

By Jeff St. John . 28 September 2021
Solar

Newsletter: It’s time to ask for more from clean energy projects

Some projects reduce more carbon than others. Should they get paid more?

By Julian Spector . 21 September 2021
Long-duration energy storage

Investors are whipping up an irrational frenzy in the long-duration energy storage sector

Here are more than 20 long-term storage companies that have been attracting dollars into that bubble.

By Eric Wesoff . 21 September 2021
Clean energy

Location matters: The new science of siting clean energy to push more carbon from the grid

Where solar and wind is built matters when it comes to displacing dirty energy. Clean energy buyers are starting to pay attention.

By Jeff St. John . 20 September 2021