as of right now it takes 30 Hydrogen to make 10 fuel (thats with vip status mind you) in total a loss of 60 solars on that conversion.
It may just be the material you are trying to use. I know that with Selenium, you get 4 fuel cells per 1 unit, and I'm sure there are even better ones out there. I agree that having a way to make our own fuel would be beneficial, but theres also other good ways of doing it now