This essentially means that gas stations will add fast chargers to their parking spaces, as there is already an European directive mandating a gas station every 100Km (I think) in highways and freeways.
[0] https://www.theglobeandmail.com/business/article-parkland-ga...
This obviously can't be allowed to happen .. but I don't think there's any sign of that, as grid electricity remains cheaper than onsite generation. On a trip last month it was very noticeable that several rest stops had under-construction chargers in addition to the one or two that had previously been put in.
If you allow gas powered generators to complement EV stations, you will have more EV charging stations in remote areas or otherwise areas that wouldn't see EV chargers. Every extra EV charger will drive up the adoption.
But you don't have to do this! You can just put them on the grid. There are very few places that are truly off grid in Europe, mostly on islands, and absolutely zero on motorways.
If you can install a 2.5MW diesel generator to cover those areas, encouraging adoption, that is a good thing. I am not talking about 4 lane motorways, where access to megawatt power lines might not be that challenging, but more remote areas.
Maybe 2 chargers 50kW would be perfectly sufficient and much more economical outside of freeways?
They rely on the fact that it is common for some of the stalls to be empty, occupied by cars that have finished charging or can't charge at the full rate for whatever reason.
Some sites have batteries to provide a bit more power for the busiest times too. That has the benefit that those same batteries can participate in grid balancing the rest of the time (buying and selling power for profit, and getting paid for various technical grid services too).
That remains for the free market to decide....if the owner considers a generator is cheaper, then leave him be. Where grid power is enough, electricity will be much cheaper than a generator, so if the owner wants a generator, it's probably a choice between having a generator charger vs no charger.
Possibly. But I would expect this to be a very uncommon scenario. Unless you’re running a car race* for instance you’d have to have a situation where somebody would both be willing to pay 2x or more per kWh and also prefer to not charge their car at all if they couldn’t do it in 5-15 minutes.
* https://www.sportskeeda.com/amp/f1/news-red-bull-s-helmut-ma...
That's a good use case for battery backed or battery integrated chargers. They can charge up the battery on a smaller grid connection but still deliver fast charging since you're drawing from the battery pack.
Freewire's Boost Charger 200 is an example of a battery integrated charger: https://freewiretech.com/products/dc-boost-charger-200/
Many charging locations are getting dedicated batteries to smooth off the peaks and valleys of fast charging, turning it into a much more constant draw. When a peak is needed the battery fills in. When the site is more idle, instead of a valley, power is diverted to the battery to ready it for the next peak.
Another strategy companies like kempower are using is 25 or 50 kW modules that can be dynamically allocated across the whole site. At the peak of the curve a car gets many modules. As the power a car can take decreases deeper into the curve the extra modules can be assigned to a different plug. If everyone pulls in at low state of charge at the same time the site hits the limits and cars have the throttle. A more typical usage pattern of cars pulling in and out at different times means cars can maximize their charge curve while capping the total draw of the site.
Filling up a gas tank and leaving takes about 5 minutes so even if you arrive there and you have to wait in a line it's not a big deal. If recharging an EV up to a reasonable level takes 15 minutes, either they 3x the number of stands or make customers unhappy and leave for the next station, if they can get there. If they can't, they are hostage of the physics of batteries and EVs and they'll have to wait.
So I think that each charging station will have more stands to recharge EVs than gas pumps now.