Power-to-Gas with High Efficiency (IMAGE) Karlsruher Institut für Technologie (KIT) Caption The demonstrator facility of the HELMETH project combines methanation (left) and electrolysis (right) with an efficiency of 76 percent. Credit Photo: 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.