UK fuel cell firm Ceres Power Holdings plc (<a href="https://www.londonstockexchange.com/stock/CWR/ceres-power-holdings-plc/company-page" target="_blank">LON:CWR</a>) said today it has signed a contract with oil giant Shell Plc (<a href="https://www.londonstockexchange.com/stock/SHEL/shell-plc/company-page" target="_blank">LON:SHEL</a>) for the design of a 10-MW pressurised solid oxide electrolyser (SOEC) module.