Fluence optimising largest portion of AES’ 908MWh California BESS

LinkedIn
Twitter
Reddit
Facebook
Email

Global battery energy storage system integrator Fluence is using its intelligent bidding software solution to optimise the trading activity of a 508MWh system it recently completed for AES in California.

As Energy-Storage.news reported, AES brought the 127MW/508MWh Lancaster Area Battery (LAB) online on September 2, the second portion of a combined 908MWh site.

Fluence has now made its own announcement about the project and revealed that the LAB system will employ Fluence’s Mosaic platform for intelligent bidding in the state’s wholesale market, operated by the California Independent System Operator (CAISO).

Mosaic’s cloud-based platform will integrate directly with Gridstack, Fluence’s physical energy storage product. This will allow it to process operating constraints and parameters in real-time and employ advanced machine learning (ML) and artificial intelligence (AI) to generate bids that maximise LAB’s market earnings, the company said.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Both LAB and the Luna battery storage system, which makes up the other 100MW/400MWh of the project, will use Fluence’s operational services packages for performance guarantees and maintenance support.

“By utilising several solutions from our ecosystem of products, customers can craft tailored commercial and operational packages that align to their needs,” said Fluence President, Americas, John Zahurancik.

He also said that the units came online at “…just the right time when extreme heat caused spikes in electricity demand and stressed the state’s power grid”.

Fluence’s digital services segment is a small but fast-growing part of the business. In its most recent quarterly results, ‘assets under management’ for its ‘digital projects’ segment grew 310%, versus 95.7% for ‘energy storage services’ and 62.7% for ‘energy storage product’ deployments. It was also the only segment of the three where orders grew, as covered by us at the time.

AES co-founded the company along with technology and engineering firm Siemens and both companies together still hold a majority of its shares after its IPO in late 2021.

Read more Energy-Storage.news coverage of Fluence here, including its deal to build a 250MW ‘Grid Booster’ battery in Germany, an interview with its head of commercial Kiran Kumaraswamy and an analyst’s view on what the appointment of new CEO Julian Nebreda means for the company’s direction.

15 September 2026
San Diego, USA
You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.

Read Next

July 21, 2026
South Australia battery storage developer Lunio Energy has energised its first grid-scale BESS at Strathalbyn and started trading in the NEM.
July 20, 2026
Residential renewable energy solutions company Palmetto recently launched its Palmetto Energy Backup Plan, a residential battery subscription aimed at making residential storage more accessible in 25 US states.
July 17, 2026
Battery energy storage systems (BESS) operating in California’s grid left approximately US$98 million on the table due to suboptimal bidding strategies, according to a new analysis from Gridmatic.
July 17, 2026
Zinc hybrid cathode battery and storage system maker Eos Energy Enterprises has announced a strategic partnership with the US Department of Defense (DoD) to “enhance the resilience of national defence infrastructure.”
July 16, 2026
Distributed energy resource (DER)-focused companies Sunrun and FranklinWH are expanding in California and Texas, US, respectively.