To maximize the battery/motor warranty you should drive less than 100,000 in 8 years or 12.500 miles a year (35 miles a day). Therefore, ideally your commute should be less than 18 miles, each way.
But what would the maximum safe commute of a SR+ be, if you are only charging overnight?
Given that the battery capacity of a SR+ is 47.5 kW/h (usable) and only using from 90% to 10%, in winter with a battery that has degraded by 30%, the maximum available battery will be;
47.5 x 70% x (90% - 10%) = 26.6 kW/h
In the winter, with temperatures around zero C, I am getting around 360 W/m (mixed motorway and town driving), so that would give me a range of 26.6 kW/h / 0.36 kW/m = 74 miles (or 37 miles each way). Of course, in the summer you will have a much greater range…
What happens if the motorway is blocked for 1 hour and you must sit in the car?
Well, I warmed up my car by driving it 60 minutes and then left it sat on the drive with the heater set to 20 C. The outside temperature was 0 C and the car consumed 10% of the battery in 1 hour.
This is equivalent to 47.5 x 10% = 4.75 kW/h @ 360 W/m = 13.2 miles range lost!
Taking everything into consideration, and with a good safety factor, I would be happy using a SR+ to make a maximum daily commute of 60 miles. I guess a 90 mile commute would be fine in a Long Range M3…
What commute (daily mileage) do most people do in their M3 (when not in lockdown)?
But what would the maximum safe commute of a SR+ be, if you are only charging overnight?
Given that the battery capacity of a SR+ is 47.5 kW/h (usable) and only using from 90% to 10%, in winter with a battery that has degraded by 30%, the maximum available battery will be;
47.5 x 70% x (90% - 10%) = 26.6 kW/h
In the winter, with temperatures around zero C, I am getting around 360 W/m (mixed motorway and town driving), so that would give me a range of 26.6 kW/h / 0.36 kW/m = 74 miles (or 37 miles each way). Of course, in the summer you will have a much greater range…
What happens if the motorway is blocked for 1 hour and you must sit in the car?
Well, I warmed up my car by driving it 60 minutes and then left it sat on the drive with the heater set to 20 C. The outside temperature was 0 C and the car consumed 10% of the battery in 1 hour.
This is equivalent to 47.5 x 10% = 4.75 kW/h @ 360 W/m = 13.2 miles range lost!
Taking everything into consideration, and with a good safety factor, I would be happy using a SR+ to make a maximum daily commute of 60 miles. I guess a 90 mile commute would be fine in a Long Range M3…
What commute (daily mileage) do most people do in their M3 (when not in lockdown)?