A new operating scheme for remote grid-integrated electrolyzers has been implemented with the Hy2B electrolyzer in Pfeffenhausen. While RFNBO criteria usually enforce PPA contracting renewable electricity production at fixed prices, Hy2B has found a way to couple green hydrogen production with electricity prices at day-ahead and intraday stock markets, while offering control power services to the grid.

With such scheme, the Hy2B electrolyzer runs when renewable power is available at low-cost and is halted in warm standby when renewable electricity is scarce. As a result, a new cost-competitive renewable hydrogen production could be installed.

The presentation gives an insight into the operating scheme and underlying technical setup and controls and defines criteria how to operate electrolyzers in Germany in a grid-serving and competitive mode.