Invinity Energy Systems and Eos Energy Enterprises are providing long duration energy storage systems to the ‘biggest renewables microgrid project in the US’, being developed for the Viejas Tribe of Kumeyaay Indians in Southern California.

Reports of Eos’ aqueous zinc battery being paired with small modular nuclear reactors (SMNRs) in a joint venture (JV) with Holtec appear to have been greatly exaggerated, according to an Eos representative.

While lithium-ion is rapidly racing ahead to become the “de facto grid storage solution” and is the most popular technology choice by far, vendors of other types of batteries are also targeting the market, with varying degrees of success.

News in brief from this week in energy storage around the world.

Multinational utility Engie will install a 1MW / 4MWh Eos Energy Storage zinc hybrid cathode battery system in Brazil and is expected to “exercise the system to its operational boundaries”.

Solar PV paired with energy storage at scale could be provided to utilities at just US$0.10 per kilowatt hour, using advanced battery technology, one manufacturer has claimed.

Former First Solar CEO Jim Hughes has joined aqueous battery storage system maker Eos Energy Storage as chairman of its board of directors.