VIDEO: Demystifying the BESS metrics that matter most, from SoC and SoH to cell imbalance and RTE

By Solar Media Staff
October 24, 2025
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Energy-Storage.news proudly presents our sponsored webinar with Wärtsilä, demystifying the battery energy storage system (BESS) metrics that matter most.

In the rapidly evolving global energy landscape, battery energy storage has emerged as a cornerstone for ensuring grid stability and efficiency. From helping stabilise data centre loads, to being deployed as a means of grid modernisation, to supporting the proliferation of renewables, as the world transitions towards widespread electrification, the role of BESS becomes increasingly critical.

However, misunderstood metrics are quietly eroding the performance and profitability of these systems.

Wärtsilä battery analytics experts Andrea Meister and Steve Merrick present a critical session that cuts through the confusion surrounding state of charge (SoC), state of health (SoH), cell imbalance, and round-trip efficiency (RTE)—parameters that directly impact real-time operations and revenue.

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As grid demands intensify and performance expectations rise, the margin for error is shrinking. Andrea and Steve unpack how these metrics are measured, how errors and degradation develop, and how to proactively avoid them.

Viewers will gain practical insights into how these factors influence real-time usable energy and system performance. Whether you’re a BESS system engineer, operator, owner, or analyst, this session will equip you with the knowledge to optimise your BESS and protect your bottom line.

Key Takeaways:

  • Learn how state of charge (SoC), state of health (SoH), cell imbalance, and round-trip efficiency (RTE) are measured, and how errors and degradation are likely developing in your system.
  • Understand how these key parameters are impacting the performance and profitability of your BESS Gain insight the hardware and software components that impact the fidelity of your battery data and analytics and how poor data quality can impact your financial modelling.
  • Get a view into Wärtsilä’s battery analytics tools that are addressing these errors to ensure BESS owners can get the most value and energy out of their system

Speakers:

Andrea Meister, senior product manager, BMS, Wärtsilä

Steve Merrick, senior product manager, analytics, Wärtsilä

Moderator:

Andy Colthorpe, editor, Energy-Storage.news

See the webinar on YouTube below. You can also register to watch the webinar and get access to presentation slides from the on-demand section of our website, where you can also find all our other Energy-Storage.news webinars.

25 August 2026
Sydney, Australia
Building on our successful global portfolio of energy storage network events including our successful Energy Storage Summit Australia, combined with the exponential buildout of large-scale energy storage, we are delighted to return for the inaugural Battery Asset Management Summit Australia in Sydney (25-26 August 2026). The Battery Asset Management Summit has been received worldwide with huge optimism and has quickly established itself as leading event series for connecting asset owners with optimisers, software providers, and many more.
1 December 2026
Italy
Battery Asset Management Summit Europe is the annual meeting for owners, operators, investors, and optimisation specialists working with operational BESS assets across the continent. The Summit focuses on how to maximise performance and revenue, manage degradation, integrate advanced optimisation software, navigate evolving market and regulatory frameworks, and plan for repowering or end-of-life strategies. With insights from Europe’s most active storage markets, it equips attendees with practical guidance to run resilient, profitable battery portfolios as the sector scales.

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