Energy storage

Batteries

Tesla just launched the Megablock, a big, easy-to-deploy grid battery

The new storage product combines four Megapacks and a transformer in one handy package, aiming to pack in more battery cells and streamline installation.

By Julian Spector . 9 September 2025

a square of big white boxes against the backdrop of a sunset — These Tesla Megablocks can store solar power after the sun sets. (Tesla)

Batteries

Peak Energy's new battery is cooler than lithium-ion systems

The startup’s first sodium-based grid-battery project has a novel design that cuts costs by virtually eliminating the need for temperature controls.

By Julian Spector . 21 August 2025
Hydrogen

This hydrogen microgrid is the first of its kind. Is it a good idea?

Energy Vault, Plug Power, and PG&E partnered on a project that replaces diesel generators with fuel cells to provide backup power for a small town in California.

By Julian Spector . 11 August 2025
Long-duration energy storage

Used EV batteries could upend the race for long-duration storage

Redwood Materials says second-life batteries are the cheapest form of long-duration storage. If true, battery startups are in trouble — and renewables are in luck.

By Julian Spector . 6 August 2025
Energy storage

A pioneering ‘second-life’ battery startup begins major Texas expansion

Armed with lessons from five years of hooking up used EV batteries to the grid in California, B2U is making a 100-MWh foray into Texas’ volatile energy market.

By Julian Spector . 29 July 2025
Energy storage

Powin fueled the US grid storage boom. Then the company crashed.

The Oregon-based battery firm filed for bankruptcy this summer, jeopardizing its 11.3 gigawatt-hours of storage projects installed around the world.

By Julian Spector . 24 July 2025
Energy storage

Redwood Materials built record grid storage project using old EV batteries

The EV battery recycler determined it could make good money by repurposing old battery packs for the grid, and found an eager data center customer.

By Julian Spector . 2 July 2025
Energy storage

The Northeast just faced record heat. Batteries could’ve helped.

Grid storage can keep fossil fuel peaker plants dormant and prevent demand-induced outages like the Northeast saw this week.

By Kathryn Krawczyk . 27 June 2025
Energy storage

LG opens massive Michigan factory to make LFP batteries for the grid

The $1.4 billion investment onshores production of a popular battery chemistry that had been almost exclusively made in China, amid tariff and tax policy uncertainty.

By Julian Spector . 25 June 2025
Energy storage

Could the Senate budget throw a lifeline to energy storage?

Grid batteries have surged since they got their own tax credit in 2023. The Senate could spare grid storage projects while cutting incentives for wind and solar.

By Julian Spector . 19 June 2025
Energy storage

An Illinois bill seeking to supercharge battery storage failed. Now what?

Supporters hoped the legislation would accelerate the state’s clean energy transition, but it stalled amid opposition from unions, farmers, and fossil-fuel groups.

By Kari Lydersen . 16 June 2025