“SoH: Why Are We Still Talking About Battery Standards?”
On April 23, 2025, CITA hosted a members-only webinar exploring a crucial and timely topic in the evolution of electric mobility: the state of health (SoH) of electric vehicle (EV) batteries and the pressing need for standardized, independent assessments. The session brought together leading experts to unpack the technical, regulatory, and societal implications of battery SoH evaluation—an increasingly vital component in ensuring safe, reliable, and sustainable e-mobility.
The webinar featured insightful presentations by:
- Martin Dillinger, Expert Alternative Drivetrains, TÜV Rheinland
- Manuel Hagemann, Technical Expert, TÜV NORD
- Markus Gregor, Technical Expert EV Battery, TÜV SÜD
- Robin Zalwert, Head of Sustainable Mobility, TÜV-Verband
Each speaker offered a unique perspective on the evolving standards and methods for independently assessing battery health, setting the stage for an engaging discussion and Q&A session.
As highlighted throughout the webinar, the lack of harmonized standards for battery SoH remains a critical barrier to building trust in second-hand EV markets and ensuring the effectiveness of periodic technical inspections. Attendees were reminded of a compelling statistic from the TÜV Mobility Study 2024: 62% of car owners would trust battery condition assessments only if conducted by independent testing organizations.
The webinar underscored the complexity of evaluating SoH, especially given the discrepancies between OEM-specific readouts and independent testing. Presentations showcased how software updates, usage patterns, and manufacturer-defined metrics can obscure true battery condition, reinforcing the necessity for neutral, transparent assessment protocols.
The program offered a comprehensive overview, including:
- Objectives and implications of the German SoH-Merkblatt (MB FZMO 767:2024) – a technical guideline supporting independent SoH determination, emphasizing reproducibility, neutrality, and quality assurance.
- Differences between OEM-based and third-party SoH evaluations, highlighting the challenges of trust, data access, and result comparability.
- Evaluation criteria for neutrality and independence, advocating for standardized methodologies and legally safeguarded data access.
- Updates on GTR 22 – the upcoming Global Technical Regulation establishing durability benchmarks and minimum performance requirements for battery energy and range, pivotal for EURO 7 implementation.
Participants left with a clear message: independent, standardized SoH assessments are not just a technical necessity—they are the cornerstone of sustainable, transparent, and circular EV markets.
CITA extends its thanks to all presenters and participants, and looks forward to continuing the conversation on advancing battery health standards and best practices.