Qualifications
Developing fuel cell technology sounds like it should be a no-brainer career, right? Wrong; it's more like an all-brainer career. To excel within the green power technological revolution currently underway, you're going to need to be capable of an intense amount of analytical, data-driven thought, as well as an incredible imagination and willingness to stretch beyond that which has come before.
You aren't just repeating previous processes and ideas like your sophomore World History teacher and their love of the phrase "those who don't learn history are doomed to repeat it." You're developing new technologies and laying the groundwork for changes in industry and infrastructure.
If having a massively capable brain wasn't enough, there's all the stuff you need to put in said massively capable brain. Being good at math and science is one thing; as a fuel cell engineer, you'll have to be able to apply that knowledge to your designs, plans, and probably even sense of humor (an anode and a cathode walk into a bar...).
You definitely need at least a bachelor's degree in either the engineering or electrical disciplines. Time spent working on fuel cells while serving in the military can be a decent substitution for that, though (source).
A Master's is usually desired as well, although not completely necessary if you have a lot of experience (like a vocational high school or a couple years at a technical school). To truly master the intricacies of fuel cell technology (and also have the best chance of becoming an owner/boss/manager), you'll want to get working on that Ph.D. It might be a lot of work, but at the end of it all, you'd be a Doctor of Alternative Energy, which is as close to Jedi Master as you can get.
You'll also need to make sure you're attending an ABET-certified engineering school (source). This is what separates the professional mechanical engineer from the amateur hobbyist. Sure, getting a slip of paper from the University of No Campus for taking a few online courses is nice, but it's no replacement for between four and ten years of hardcore, lab-based experimentation.