The market for renewable hydrogen in California is based primarily on the projected need for hydrogen fuel for fuel cell electric vehicles (FCEV) as they are currently coming to the roads in California. The demand is projected to be 70 million kg/year by 2030. This analysis shows that hydrogen demand can be filled through commercial electrolysis using excess renewable energy. This paper is also focused on the revenue potential for the use of electrolysis to provide fuel for FCEVs, and from demand response at the wholesale level, thus enabling greater penetration of renewables. Clean fuel not only reduces pollution and greenhouse gases from the transport sector, but also provides carbon:credits as a bonus revenue stream. The analysis addresses both demand and supply in the 2030 and 2050 timeframes. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.