The Energy Storage Report 2024

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

Lightsourcebp: ‘Now is the time to be thinking about long-duration energy storage’


Lightsourcebp is considering which long-duration energy storage technologies would be best suited for integration with its US solar power portfolio.

Sara Kayal, global head of PV integrated solutions at the solar developer, was speaking on a panel discussion on long-duration energy storage (LDES) held on Day One of the RE+ 2022 clean energy industry trade event in California.

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

Recently ranked top among global utility-scale solar developers by Mercom, Lightsourcebp has been looking to add energy storage to its solar farms, Kayal said, and supportive policies in the US mean non-lithium LDES technologies could be chosen.

“We are looking at adding to storage to our solar farms; that can be battery storage, it could be green hydrogen,” Kayal said, adding that “this is exactly the time [when] we need to discuss long duration because we have incentives, and we now have the power to make it happen”.

Kayal later in the discussion noted that in regions like Texas’ ERCOT market, many megawatt-hours of renewable power are lost to curtailment during periods of excess generation, which LDES could be suited to solve.

As with some other sources spoke to at the event, Kayal also added that “competing with electric vehicles (EVs)” for battery supply isn’t working, referring to the major cause of supply chain constraints for lithium-ion.

The session’s moderator, Michael Foster at developer Avantus – recently rebranded from 8minute Solar Energy – asked the participants for their definitions of long duration. Kayal and Fluence VP of growth and head of commercial Kiran Kumaraswamy agreed that it would broadly be eight hours or more.

Anything over eight hours “goes beyond the constraint” of lithium-ion technology, Kayal said. When pressed by Foster whether that meant lithium would still be competitive at eight hours, said that when it came to evaluating technologies, it might be better to not compare purely in terms of hours stored and discharged.

The durability of some LDES technologies to perform many duty cycles over a long lifetime presents an opportunity to reduce the amount of planning required for augmentation, for example.

Molly Bales of Form Energy said different use cases will require types of energy storage, from the shorter duration applications performed by lithium-ion up to eight hours and diurnal storage beyond that, to storage effective over many hours, or even days.

Form Energy is developing and commercialising a proprietary battery technology based on an iron and air chemistry, designed to offer up to 100 hours of storage. Multi-day storage offers a different use case based on resiliency and reliability of energy supply, rather than daily market participation or peak shifting, Bales said.

Fluence’s Kumaraswamy said that virtual transmission, where energy storage is used to directly enhance the transmission grid and ease congestion, could be a promising application for longer-duration storage.

The energy storage system integrator and technology provider is technology agnostic and continues to evaluate new technologies, Kumaraswamy said. What alternative technologies to lithium-ion need to do, is prove not just that they are competitive for the applications lithium already does well, but that they can provide answers to applications lithium is not suited for.

This article has been amended from its original form to correct an error in spelling Lightsourcebp head of PV integrated solutions Sara Kayal’s name. And later also Kiran Kumaraswamy’s name too. Apologies to both.

8 October 2024
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 8-9 October 2024 is our second PV CellTech conference dedicated to the U.S. manufacturing sector. The event in 2023 was a sell out success and 2024 will once again gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing in the U.S. out to 2030 and beyond.
17 June 2025
Napa, USA
PV Tech has been running PV ModuleTech Conferences since 2017. PV ModuleTech USA, on 17-18 June 2025, will be our fourth PV ModulelTech conference dedicated to the U.S. utility scale solar sector. The event will gather the key stakeholders from solar developers, solar asset owners and investors, PV manufacturing, policy-making and and all interested downstream channels and third-party entities. The goal is simple: to map out the PV module supply channels to the U.S. out to 2026 and beyond.

Read Next

June 13, 2024
US$5 million will be made available for long-duration energy storage (LDES) projects via a competitive solicitation run by the New York State Energy Research and Development Authority (NYSERDA).
June 13, 2024
Developer Ethical Power has received planning consent for a 65MW solar-plus-storage project near Christchurch, New Zealand.
June 13, 2024
Liquid air energy storage firm Highview Power has raised £300 million (US$384 million) from the UK Infrastructure Bank and utility Centrica to immediately start building its first large-scale project.
June 12, 2024
One of the world’s most widely deployed non-lithium electrochemical energy storage technologies has received an upgrade, with the launch of NGK and BASF Stationary Energy Storage’s the NAS MODEL L24.
June 11, 2024
US-based independent power producer (IPP) NextEra and utility Entergy have revealed a five-year, 4.5GW development pipeline of solar and storage projects.

Most Popular

Email Newsletter