Bigger cable, upgraded delivery infrastructure to support that cable (think more or stronger poles), transformer upgrades, and finally the charging stations which unlike the home ones aren't just a complicated switch because DC fast charging.
H2 is a stupid fuel, but the idea that high power vehicle charging stations are a cheap or simple upgrade to a gas station is ridiculous.
You are correct that neither option is free BUT there are options. I don't know but to me it seem like the cheaper option than building the H2 infrastructure. Second of all there are options like on site battery/capacitor banks that can buffer the energy used for the faster charging. It might not be for everywhere but as a final option there is slower charging.
Bigger cable, upgraded delivery infrastructure to support that cable (think more or stronger poles), transformer upgrades, and finally the charging stations which unlike the home ones aren't just a complicated switch because DC fast charging.
H2 is a stupid fuel, but the idea that high power vehicle charging stations are a cheap or simple upgrade to a gas station is ridiculous.