Regards:
http://www.threephasefilters.com/

However, EV advocates who deny that fuel cells have a role to play in the transportation system omit the problems that EVs have in satisfying the needs of various applications. EVs are perfect for commuter vehicles. But vehicles that require long ranges (long-haul trucks) or have large energy demands (buses) are much more challenging for EVs. Adding battery capacity is expensive and makes the vehicle heavy. Adding hydrogen capacity is much easier. And even if you can make the case for adding battery capacity, you have the problem of charging. Setting aside the issues with getting three-phase AC power everywhere, even a Tesla Supercharger at 90 kW will take an hour to charge the largest Model S battery, let alone a bus battery that would likely be bigger. And constant fast charging means higher degradation.

It’s important to understand that batteries and fuel cells are complementary technologies, not competing. Both have advantages and drawbacks. No fuel cell vehicle will be built without batteries because of regen braking and transient capability. And EVs simply cannot provide the solution for all transportation needs. Now, there may be other options like flow batteries that may be able to do it, but there is no reason to constantly knock down fuel cells whenever there is a post about them. This article is about technological advancement, yet there is something about fuel cells that draws so much criticism that it must be something other than just the efficiency losses.

http://www.cellaenergy.com/