Shares in energy storage specialist ITM Power (LON:ITM) rose as it reached another goal - the Thüga group's power-to-gas plant in Germany has qualified to offer secondary balancing power.
ITM provided the electrolyser to the plant in 2013.
It means the system has passed all the capability tests and means that when supply exceeds the demand, the electrolyser can increase its electrical consumption as and when required to do so by the transmission system operator (TSO).
The power is then taken and converted into hydrogen, contributing to the stability of the electrical grid.
The deployment of ITM's PEM (proton exchange membrane) electrolysis in this way is a new application for this technology, demonstrating the pioneering nature of this work.
At the end of 2013, the plant injected hydrogen for the first time into the Frankfurt gas distribution network becoming the first plant to inject electrolytic generated hydrogen into the German gas distribution network.
Phil Doran, managing director of ITM Power, said: "The Thüga P2G plant was the first of its kind to be deployed world-wide."
He added: "We are delighted that the electrolyser supplied to the Thüga Group continues to operate well under varying conditions.
"Achieving qualification for the market for secondary balancing power demonstrates that the plant satisfies the stringent grid balancing requirements here in Germany, adding to the attraction of PEM P2G plants."
Shares in ITM added 5.45% to stand at 29p each.