Do frequent start/stop cycles and ramping affect the electrolyser's longevity or performance?

As with all electrochemical devices, our AEM electrolyser stack’s lifetime is shortened with frequent start/stops. With increasing experience in the field and operational data, we can now recommend our customers to limit the electrolyser’s operative cycles to a maximum of

January 11, 2022

As with all electrochemical devices, our AEM electrolyser stack’s lifetime is shortened with frequent start/stops. With increasing experience in the field and operational data, we can now recommend our customers to limit the electrolyser’s operative cycles to a maximum of five on/off cycles per day, and one on/off cycle per hour. This helps to ensure the longevity of the electrolyser.

The electrolyser works most efficiently and is most durable when operating continuously. However, our modular design and the Enapter Energy Management System are perfectly suited to accommodate for changing renewable energy supply or fluctuating demand. Individual electrolysers can be ramped from 60-100%, and the combination of many electrolysers will allow you to achieve any flowrate needed. If hydrogen demand is intermittent during the day, the addition of an appropriately sized buffer tank can minimize on/off cycles of the electrolyser.