OK, let's have a closer look at this Model S P85D: 85 kWh Performance Model S 5YJSA1H22FFP63813 | Tesla
Here is what you should know that is not obvious on that page:
In addition, it will be difficult to skip busy superchargers. The solution is to slow down to reach your destination. The car will actually display a warning. It will say, "slow down to 60/65 mph to reach your destination." See the image in the opening message here. This is ironic because you have to drive slower in a high-Performance car compared to the non-Performance version of the same model (Model S 85D).
You might think that the battery has 8 years warranty, therefore you don't have to worry about degradation. That's not correct. The 8 years warranty is only for complete failure. It doesn't cover degradation in any shape or form. In fact, if you read the warranty document, it specifically says that degradation is not covered.
The good news is, degradation slows down after 40K miles. Between 40-80K miles, it should drop from 95% to 94% battery capacity on average. The bad news is, the specific CPO you buy might have 93% or 92% at 40K miles depending on how well it was looked after by the previous owner. It will be difficult for you to find out this information before you purchase a CPO. You could buy a 90 kWh pack for more range but there are heavy degradation issues with 90 packs.
Another important detail is that the battery capacity of Model S 85 and 90 kWh versions is over-advertised. The 85 kWh S/X pack actually has 77.5 kWh usable capacity, less than a Model 3 Long Range which has 78.2 kWh usable capacity and is a lot more efficient. Generally speaking, it would be a smart decision for P85D owners to switch to a Model 3 P, especially considering that all P85Ds have AP1.0 and the plastic nosecone.
Here is what you should know that is not obvious on that page:
- Even though the page says 253 miles EPA rated range, that's for a Model S P85D with 19" wheels. This car has 21" wheels and the test score was 242 miles EPA rated range. See the screenshot here from Tesla.com at the time. The car will still display 253 mi because EPA rules don't require displaying different range numbers for configurations that don't exceed 33% of that version. However, that doesn't change the fact that the car has less range with 21" wheels.
- However, 242 miles is for a new Model S P85D. This is a used car with 40K miles. At this mileage, Model S cars have 95% capacity left on average. See the chart here. That means you are now down to 242*0.95= 230 miles.
- However, that's the range you get at 68 mph speed. If you look at the table above, at 75 mph you get 216 miles when the car is new and 216*0.95= 205 miles at 95% capacity.
- However, that's the range in Summer. Winter range will be 20% less. Search for 'Tesla winter range' to find out more. Now you are down to 205*0.8= 164 miles at a full charge.
In addition, it will be difficult to skip busy superchargers. The solution is to slow down to reach your destination. The car will actually display a warning. It will say, "slow down to 60/65 mph to reach your destination." See the image in the opening message here. This is ironic because you have to drive slower in a high-Performance car compared to the non-Performance version of the same model (Model S 85D).
You might think that the battery has 8 years warranty, therefore you don't have to worry about degradation. That's not correct. The 8 years warranty is only for complete failure. It doesn't cover degradation in any shape or form. In fact, if you read the warranty document, it specifically says that degradation is not covered.
The good news is, degradation slows down after 40K miles. Between 40-80K miles, it should drop from 95% to 94% battery capacity on average. The bad news is, the specific CPO you buy might have 93% or 92% at 40K miles depending on how well it was looked after by the previous owner. It will be difficult for you to find out this information before you purchase a CPO. You could buy a 90 kWh pack for more range but there are heavy degradation issues with 90 packs.
Another important detail is that the battery capacity of Model S 85 and 90 kWh versions is over-advertised. The 85 kWh S/X pack actually has 77.5 kWh usable capacity, less than a Model 3 Long Range which has 78.2 kWh usable capacity and is a lot more efficient. Generally speaking, it would be a smart decision for P85D owners to switch to a Model 3 P, especially considering that all P85Ds have AP1.0 and the plastic nosecone.
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