We have a standard for hydrogen. We do not have a standard for electric vehicles that has been adopted by all manufacturers, but there are adapters that are bridging that problem.
I think the bigger issue right now is that we don't.... The people providing the charging infrastructure all require sign-ups. People have to enrol, which means that if you're driving down the highway and you want to use a ChargePoint, you have to be a ChargePoint customer. You can't take a Visa card and swipe it and get your charge. That becomes just one more obstacle limiting the adoption of EVs. Eventually, we need to have all chargers operate in a fashion similar to a gas station pump, where any credit card we use, any bank card we use, can be utilized to charge those cars.
That just isn't the case today. Right now, there are no standards out there for that type of service. I think part of the building of the infrastructure will require those standards to be put in place.