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Some of them have night tariffs, some have EV specific tariffs with integration with your charging station.

We get that too, but just from our one power company. I basically have two options for payment agreements, a block-based system (1st 400kWh at one price, everything else at a higher price) and a time of use system (half price off peak, double price on-peak). There's technically a third for low-income people.

We also have a net metering incentive as well, so basically if you supply power to the grid, you only pay the net between your production and your use. If you go negative, it rolls to the next month, and that extra resets at the calendar year.

We can also pay for blocks of 100% renewables ($2 extra per 100 kWh per month), and there are a few incentives again (e.g. discounts/rebates for smart thermostats, low-power appliances, etc).

So it sounds like I'm getting pretty much the same choices you are, I just don't get to choose who handles my billing.

any company with a correct licence can do upgrades.

Interesting, but that has nothing to do with the privatized electrical companies. If we had triple phase power at the street, I could pay any electrician to do the swap, and they'd probably just notify the power company (and maybe pull a permit from the city). What's odd is that triple phase seems possible on the power company's website (i.e. there are different charges in the rates disclosure), but I really don't think it's common at all.

Anecdotally, I can get up to 11kW @ home w/o needing triple phase power. I have a 50A 220V circuit at home for my oven, as well as 3 220V circuits in my garage that could probably be upgraded to 50A (two are 30A, the other is 20A). That's plenty for me, but it would be cool to have faster charging I suppose.