HELMETH Prototype (IMAGE) Karlsruher Institut für Technologie (KIT) Caption With a highly efficient power-to-gas process, the HELMETH prototype reaches efficiencies of 76%. Credit Sunfire GmbH Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.