Form Energy, the US startup behind a battery technology that aims to cost-effectively provide 100-hour duration energy storage, has closed a Series F funding round.

RayGen, a startup developing long-duration energy storage (LDES) technology designed for pairing with renewable energy installations, has raised investment to kick off a Series D funding round.

The revenue advantage of 2-hour battery energy storage systems (BESS) in Germany versus 1-hour systems is nearly three times higher than it was two years ago, optimisation firm Entrix told Energy-Storage.news after its latest fundraising round.

Polarium, a Sweden-headquartered energy storage system manufacturer, has raised SEK562 million (US$48.3 million).

Energy Dome, the European startup with a long-duration energy storage system technology based on CO2, has closed its Series B funding round.

Infradebt has made the first close of a fund dedicated to investing in large-scale battery storage projects around Australia.

Noon Energy, developer of a novel carbon-oxygen battery for long-duration storage, has raised US$28 million in a Series A funding round.

US$18 million Series B closed by H2 Inc, a South Korea-headquartered manufacturer of redox flow battery energy storage systems.

ZincFive, a US company developing nickel-zinc battery technology for applications including data centre UPS has closed a Series D round.

Form Energy has raised US$450 million from investors including ArcellorMittal, bringing the startup’s total investment to US$800 million.