On the heels of its i3 model, BMW is now working with Toyota to develop its second alternatively-powered vehicle. According to Automotive News, BMW will begin testing a new hydrogen fuel cell vehicle that they expect to be ready for customers in 2020. Matthias Klietz, head of powertrain research for BMW, expects fuel cell cars to be well established around 2025 to 2030, although challenges still remain.

BMW demonstrated the joint technology earlier this week in Mirimas, France. The event showcased the company’s multibillion-dollar effort to develop alternative power sources with a 5-Series Gran Turismo. The German brand is currently in talks with several carmakers, governments, and utility services on how to speed up the creation and implementation of a refueling network. While the technology may be ready in its early stages, cost is still the largest hurdle for mass fuel-cell production. By 2018, the estimated number of fuel cell cars on the road is expected to reach 8,400 units, up from 1,275 at the end of this year.