So I finally broke down and sprung for an OBDeleven - decent little device, though I wish we had more insight into the actual meaning of all the fields we're able to view. (Old thread, I know, but thought it'd be best to keep it going rather than start anew.) The battery energy numbers above must be after VW's safety buffer, but what about my SOH_Q and _P numbers? They're quite a bit lower than your numbers. Would drop before around 38%, now dropping at 43%. I have noticed that my motor power gauge is dropping sooner than it used to. HV-EM_Energy_information-HV-EM_high_voltage_battery_energy_info. HV-EM_Energy_information-High_voltage_battery_energy_information 31100 Wh Always charged L2, usually at home to 50% and then 100% at work for the return trip (48 miles 1 way).īattery_Charge_Condition 96.8% (note difference with above reading) Note that most of my driving is freeway, and I charge before I dip into the red.

Here's my numbers taken today after 6000 miles and taken right off the charger at 100%. I have a Ross Tech VCDS cable and unfortunately I didn't take a snapshot of what the car's values were when new. It's probably available if you have a Ross-tech VCDS USB hex cable and software, available from Ross-tech, for a price.ĭo you have OBD11? Based on another thread on here I did some digging and I'm currently trying to figure out the Wh figures listed on module 19. : 21551 WhĪnyone else with OBD11 or VCDS please feel free to add your figures to this, it would be great if we did find a way to diagnose battery health without relying on the trip computer.

The HV battery charge state figure matches the figure shown in CarNet, so this must be the 'user facing' SOC, not the absolute cell SOC. The 'Energy storage unit SOC' strongly seems to be listing the vehicles current state of charge in Wh, and this was supported not just through the math working but also observing the figure drop 300Wh (in 100Wh increments) over some period of time with the car running and me monitoring figures in OBD11. The math here seems to work out to suggest that the cars leave the factory with about 90% of the battery available for use when 'fully charged' on the battery gauge. I did some math here based on my cars, extrapolating out from the figures I saw listed in OBD11. There's some speculation that the SOH_Q and SOH_P figures somehow tie into battery degradation. Sparklebeard wrote:Do you have OBD11? Based on another thread on here I did some digging and I'm currently trying to figure out the Wh figures listed on module 19.

Obd11 vs vcds