The energy transition requires flexible technologies

to maintain grid stability, and electrolyzers are playing an

increasingly important role in meeting this need. While previous

studies often question the dynamic capabilities of large-scale

alkaline electrolyzer systems, we assess their potential to provide

balancing services using real manufacturer data. Unlike common

approaches, we propose the decoupling between the total electrolyzer

power and a smaller fractions of power actually offered

on balancing markets. Adapting an existing methodology, we

analyze alkaline electrolyzer systems and extend the assessment

to Germany and Europe. Our results show that large-scale

electrolyzers are technically capable of delivering fast-response

balancing services, with significantly lower dynamic requirements

than previously assumed. The planned electrolyzers in Germany

could cover the entire balancing capacity market, potentially

saving around 13 % of their electricity costs, excluding energy

balancing revenues. The decoupling also resolves part of the

trade-off for electrolyzer manufacturers, enabling the design of

less dynamic but more stable systems.