Hydrogen fuel cell vehicles (FCVs) use four times as much electricity on a per-mile basis as a battery EV if the hydrogen is obtained through the process called electrolysis. So, you would need four times the number of solar panels to go the same distance as you would in a battery EV. FCVs are also 40 percent less efficient than battery EVs if the hydrogen is obtained from converting natural gas, and this process releases significant quantities of CO2 into the atmosphere. FCVs have many difficult and expensive engineering challenges to solve before they will ever be widely available, and even then, the energy required per mile will probably still be substantially higher than for EVs. The electrical grid already exists for plug-in vehicles, only a handful of hydrogen refueling stations currently exist. The bottom line is that there is no advantage to using FCVs over EVs.