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

June 22, 2026
South Australia’s SA1 trading region reached the NEM AU$20,300/MWh price cap twice during the evening of 21 June.
June 19, 2026
FlexGen and Eos Energy Enterprises, two US energy storage sector companies with different specialisations, have entered the European market.
Premium
June 18, 2026
Energy-Storage.news Premium speaks with co-founder and chief products officer of microinverter and home energy storage system supplier Enphase Energy, Raghu Belur, about the company’s recent focus on solid-state transformer technology.
June 18, 2026
A group of sodium-ion (Na-ion) battery-focused companies have launched a new industry coalition, the American Battery Leadership Coalition (ABLC).
Premium
June 18, 2026
We chat to Stephan Lehrke, head of Germany at Second Foundation, a Czech Republic-headquartered energy asset trading firm which is becoming an owner-operator of BESS.