The research project »power4re« (reliable converters for regenerative energy supply) started with a virtual kick-off in mid-April. Under the direction of the Fraunhofer Institute for Wind Energy Systems IWES, five institutes of the Fraunhofer-Gesellschaft are working together with industry representatives on solutions aimed at increasing the reliability and robustness of inverters in photovoltaic systems and frequency converters in wind turbines. power4re is being funded under the internal research program PREPARE of the Fraunhofer-Gesellschaft with funds totaling 3.5 million euros. Converters are of central importance in the energy transition: They are indispensable technical components for the grid connection of photovoltaic and modern wind energy plants so that the regeneratively generated energy can be fed with grid-compliant voltage and frequency. The converters must, therefore, be highly reliable. However, they are exposed to particularly challenging operating and environmental conditions. For years, they have been some of the most frequently failing system components, often resulting in considerable costs. This means there is an urgent need for durable converters that are resistant to environmental influences. They therefore have a high economic potential as an indispensable technological component of the energy turnaround.