The Energy Storage Report 2024

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

CATL provides more details on ‘zero-degradation’ Tener BESS product at ees Europe


CATL, the world’s largest lithium-ion OEM, has given more details around its new battery energy storage system (BESS) product, Tener, including the company’s claims its cells will not degrade in the first five years of operation.

The China-based company gave technical details and market comments to during a presentation and media workshop at the ees Europe event, held in parallel with Intersolar Europe at the Smarter E clean energy conference and trade show in Munich, Germany today (19 June).

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

CATL announced the new grid-scale BESS product in April this year, with two significant claims about its performance. The first was an industry-leading energy density of 6.25MWh of energy storage capacity per 20-foot container. The second was the the battery cells would suffer zero degradation for the first five years of operation.

In a Q&A with journalists, CATL executives Hank Zhao, CTO of ESS Europe, and Kevin Tang, director of ESS Europe, explained how it achieved – or claims to have achieved – the second, which had been a topic of lively discussion throughout the industry.

It is a by a combination of pre-lithiation, or lithium compensation, combined with reducing the consumption of lithium-ions during battery cycles themselves, they said. This was speculated by industry sources shortly after the announcement, as covered in our follow-up piece (Premium access).

The benefit of this to the end-consumer is a higher throughput on the BESS during those first years, and the ability to push out augmentation of a BESS to seven or eight years after deployment, rather than three or five. All this means a more cost-effective deployment, they added.

Rolls-Royce, via its power systems business, is among the first system integrators to announce a partnership with CATL to deploy projects using Tener, saying today that it would use it for projects in the EU and the UK.

In response to questions from around why it had applied the zero-degradation battery technology to grid-scale BESS and not electric vehicles (EVs) Tang and Zhao said that the underlying technology had been used in some vehicle applications, though not passenger vehicles.

The reason it has been applied to BESS first is that that market demands more improvements around long lifetime for the batteries, compared with the EV segment. Demands for such lifetime-improving tech could be applied to EV batteries, but would be done in line with customer demand, the executives said.

12 November 2024
San Diego, USA
As we see more storage projects become operational, the big question is “how to maximize your assets?” This event will prepare the industry for the road ahead, looking at the core fundamentals of asset management, understanding operational challenges, along with the latest optimization and software development. You can expect to meet and network with all the key industry players 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 11, 2024
While Chinese companies dominated the square footage at ees Europe / Intersolar Europe in Munich last month, some project developers are still keen on prioritising products made closer to home.
July 10, 2024
We caught up with the CCO of Dutch-Belgian BESS developer Giga Storage, who discussed the commercialisation of gigawatt-hour-scale projects, BESS pricing and the firm’s expansion.
July 9, 2024
Multinational utility and IPP Engie has launched construction on a 200MW/800MWh battery energy storage system (BESS) in Belgium.
July 9, 2024
We hear from industry sources about the reasons for, and implications of, the increasing convergence to the 20-foot, 5MWh+ container as the dominant grid-scale BESS product today.
July 8, 2024
The CEO of LG Energy Solution Vertech, Jaehong Park, speaks to Premium for an exclusive interview.

Most Popular

Email Newsletter