Confused about definitions

[zanary]

I have a September 2007 Model S P100D around 34000 miles.

Using one of those tools on Android to read diagnostics data from that special cable under the cubby, I see the following

• Nominal Full Pack = 90 kWh
• Usable Full Pack = 85 kWh
• Energy Buffer = 5 kWh

Based on the above data, it appears as thought my pack has degraded to 90 kWh, of which they keep 5 kWH as the buffer, which means when I charge to 100%, I'm only actually charging to 85 kWh.

Would the above understanding be correct?

BTW, it shows the following which is very interesting as well

• Discharge Cycles = 202
• Charge Cycles = 214

It also shows

• DC Charge Total = 6687 kWh
• AC Charge Total = 7596 kWh
• Regen Total = 4983 kWh

 

[Blu Zap]

I have a September 2007 Model S P100D around 34000 miles.

I think it is a 2017 Model S
Your nominal, usable and buffer are consistent with other models. My P85+ started life with 82kWh nominal, 77kWh usable with a 5kWh buffer. The latter is to prevent "bricking".