The Energy Storage Report 2024

Now available to download, covering deployments, technology, policy and finance in the energy storage market

Ameresco to build 50MW/200MWh BESS in California


System integrator Ameresco will build a maximum 50MW/200MWh battery energy storage system (BESS) in partnership with Silicon Valley Power (SVP), the non-profit utility of the city of Santa Clara, California.

Ameresco will build, own and operate the BESS – on which construction is due to begin in mid-2024 – whilst charging power will be supplied by SVP from its excess renewable energy generation. The project is expected to be operational by Q4 2025.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

“This 50-megawatt battery energy storage system represents a significant step towards enhancing Silicon Valley Power’s system reliability,” said Jovan Grogan, Santa Clara City manager and Silicon Valley Power CEO. “Together with Ameresco, we are paving the way for a more resilient and sustainable energy future for our city.”

The BESS will participate in the California Independent System Operator (CAISO) markets, aiding in grid stability and balancing consumption. This is a particularly pertinent issue for CAISO following the report earlier this month which found that the system operator had been curtailing its solar PV generation more in the last year than at any other time, largely due to transmission capacity congestion. CAISO has said that developing flexible resources like energy storage systems will be key to lessening grid congestion.

Earlier this year, Ameresco announced the deployment of four BESS co-located with natural gas plants across California, totalling 379MWh. Owned by independent power producer (IPP) Middle River Power, the gas plants will increase their efficiency via the addition of energy storage, opening up more capacity for the CAISO grid.

Those four projects appear to be the beneficiary of a US$250 million financing package which First Citizens Bank announced last week (16 November). The bank said the financing would go towards a portfolio of 327M/327MWh BESS projects being developed in California by Middle River Power co-located with gas plants, though it didn’t mention the technology provider.

The discrepancy in size reported may be due to one figure being nameplate and the other being the actual size deployed, because of the need to overbuild the system for DC-AC energy losses as well as accounting for long-term degradation of capacity in the battery cells. has asked Ameresco to confirm this and will update this article in due course.

See all coverage of the company’s activity in energy storage here.

Read Next

February 22, 2024
Renewables developer and operator Arevon Energy has secured US$1.1 billion in debt and tax equity financing for a solar-plus-storage project in California which features a 150MW/600MWh BESS.
February 22, 2024
We caught up with James Li, European energy storage director of inverter and BESS provider Sungrow, at the Energy Storage Summit EU 2024.
February 22, 2024
Developer-operator Strata Clean Energy has completed a US$559 million financing package for its 1.02GWh Scatter Wash BESS project in Arizona, US.
February 20, 2024
We catch up with the president of Canada-headquartered Hydrostor, Jon Norman, about the firm’s advanced compressed air energy storage (A-CAES) tech, current projects, future plans and being a developer versus system integrator.
February 16, 2024
Energy storage investment tax credits (ITC) were priced more highly than any other clean energy type in transferability transactions last year, according to a report from tax credit ecosystem Crux which its CEO discussed with

Most Popular

Email Newsletter