90% is just fine and it's not a high SoC at all. Don't worry about it, just charge to 90% when ever you need.I think the recommended is 80% unless you are going to use the charge immediately. AFAIK holding a high state of charge and not using it immediately can cause reduced capacity in the long term.
My understanding is that the slower charging is always better as it reduces the thermal stress on the battery.
That said, there are large numbers of people who supercharge very often and the batteries are holding up fine. Bearing in mind that SuC is around twice faster than a standard 50kW rapid charger, my impression is that whilst it will be better to charge at home you're unlikely to see significant issues with your current setup.
I would probably err on the side of keeping the charge up to no more than 80%, though, unless you're likely to need the range.
My own research correlates with this. It seems that the Model 3 has liquid cooling for the batteries which will prolong their life.
Apparently other manufacturers don't have this and it wrecks their batteries.
Soooo. I think it's fine. I'll keep pumping in those free and fast electrons.
You might be surprised that time is also a factor. Charging slowly extends the time you are charging and that also has an effect on the battery cells.My understanding is that the slower charging is always better as it reduces the thermal stress on the battery.
That said, there are large numbers of people who supercharge very often and the batteries are holding up fine. Bearing in mind that SuC is around twice faster than a standard 50kW rapid charger, my impression is that whilst it will be better to charge at home you're unlikely to see significant issues with your current setup.
I would probably err on the side of keeping the charge up to no more than 80%, though, unless you're likely to need the range.
DC vs AC. Is frequent DC charging bad?
No. The car has an inbuilt inverter so AC is converted to a DC before it is supplied to the battery.
The battery is always being directly charged with DC regardless of what you supply the the car.
You might be surprised that time is also a factor. Charging slowly extends the time you are charging and that also has an effect on the battery cells.
Interesting so it’s more a case of the amount of kw your putting in at a time rather than the type.
I'd agree with what's said above but bear in mind some older S and X cars have had their maximum charge rate reduced over time and there does seem to be a connection with DC charging. I've seen a formula quoted for the S/X75 cars which relates max charge rate to number of kWh added at Superchargers - but it wasn't clear if all DC charging counted.
More recently I know of at least one owner in the OP's neck of the woods who's been affected by the "batterygate" range reduction (~10% loss of range following a software update) and did a large proportion of DC charging (mainly CHAdeMO, not Supercharging) - but Tesla have refused to say that DC charging triggered the range reduction.
Presumably the OP has access to free ChargePlace Scotland rapid charging so it's a nice bonus and won't last forever. Given the improved cooling in the Model 3 I would expect the risk of any battery damage to be less than that for the legacy S and X batteries so personally I wouldn't be too concerned but just be aware the risk isn't zero and a.c. charging is supposedly kinder to the battery cells (because, I think, it doesn't generate as much heat).
I'd agree with what's said above but bear in mind some older S and X cars have had their maximum charge rate reduced over time and there does seem to be a connection with DC charging. I've seen a formula quoted for the S/X75 cars which relates max charge rate to number of kWh added at Superchargers - but it wasn't clear if all DC charging counted.
More recently I know of at least one owner in the OP's neck of the woods who's been affected by the "batterygate" range reduction (~10% loss of range following a software update) and did a large proportion of DC charging (mainly CHAdeMO, not Supercharging) - but Tesla have refused to say that DC charging triggered the range reduction.
Presumably the OP has access to free ChargePlace Scotland rapid charging so it's a nice bonus and won't last forever. Given the improved cooling in the Model 3 I would expect the risk of any battery damage to be less than that for the legacy S and X batteries so personally I wouldn't be too concerned but just be aware the risk isn't zero and a.c. charging is supposedly kinder to the battery cells (because, I think, it doesn't generate as much heat).
The problem is that even 50kW DC charging has a large heating effect on the battery. I know the Tesla has thermal management, but in my view it's better not to thermally stress the battery unless you need to. The Kona also had thermal management, but the manual included warnings about excessive rapid charging being bad for the battery.
Personally I'd rather pay a few pence each night to charge at home at a slow rate, than risk reducing the battery longevity for the sake of a few free Watts.
Model 3? maximum you'll get benefit from is 11KW
If you have a choice between a 7KW and 22KW, it's more a preference on not blocking the 22KW for those who could benefit more from it (Renault Zöe for example)