Is that Max Energy Content or Energy Content pid? With my ID.4 (with my OBDLink LX dongle), my Energy Content at 100% is always about 92-93% of Max Energy Content. I'm not sure about newer ID.4s.

Part of my spreadsheet below. When my Max Energy was 70200 (SoH), the car was charged to 100% and Energy Content was 64775. The 7-8% gap we believe is a buffer of some sort.

Since the full usable capacity of 82kwh battery ID.4 is about 77-78kwh, it sounds like your 77,000 / 76,000 was a Max Energy / SoH number, while 68,000 / 69,000 was an Energy Content number, but I may be wrong (or the dongle may be reporting wrong numbers).

 

Curious: when do you enter data into your spreadsheet? Is it occasionally, or daily? Seems like a lot of work (but it'll likely pay off in the end!)

 

I will check. I don't think the pids are labeled that. The one I am referencing for battery content is labeled: HV Battery energy content Wh.

I also found one or two related posts that I need to read through later today.

Thanks.

 

Looks like typical reported in many other threads if you search on buffer.

Yes that is normal. Its showing your bottom buffer is 5% which is about typical. You only see the real size of that when you get SOC <10%. Similarly, there is a 4% buffer on the top that you only see when you get to 100% SOC display and it shows 96% SOC BMS.

 

Thanks for clarifying where the buffers are.