Prof. Dr. Ad van Wijk, Vincent Oldenbroek and Dr. Carla Robledo, researchers at Delft University of Technology, in 2016 conducted research on V2G technology with hydrogen FCEVs. Both experimental work with V2G FCEVs and techno-economic scenario studies for 100% renewable integrated energy and transport systems are done, using only hydrogen and electricity as energy carriers.[41] They modified a Hyundai ix35 FCEV together with Hyundai R&D so it can deliver up to 10 kW DC Power[3] while maintaining road access permit. They developed together with the company Accenda b.v. a V2G unit converting the DC power of the FCEV into 3-phase AC power and injecting it into the Dutch national electricity grid.[3] The Future Energy Systems Group also recently did tests with their V2G FCEVs whether it could offer frequency reserves. Based on the positive outcome of the tests an MSc thesis was published looking into the technical and economic feasibility assessment of a hydrogen and FCEV based Car Park as Power Plant offering frequency reserves.[42]