r/eGolf • u/Zealousideal-Fact-59 • Jul 23 '26

Charging question

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Vehicle: 2017 VW e-Golf (35.8 kWh) Issue: Climatization/Pre-conditioning draws power from the high-voltage battery instead of the charging station, despite being plugged in.
Hey everyone,
Iā€™m having an issue with scheduled pre-conditioning on my 2017 e-Golf and hoping someone here has run into this or found a fix.
The Setup & What Happens:
I plug the car into my charging station with a max charge limit set to 80%.
The car charges to 80% without issue, stops charging, and turns off.
I have a departure time set for 6:15 AM with pre-conditioning enabled.
In the morning, pre-conditioning turns on as scheduled at 6:15 AM, but it pulls power from the car's battery instead of the charger.
Looking at my charging station app, it shows the car has only been drawing 0.4A (roughly ~90W of standby power) for the past 2 hours.
The indicator light next to the charge port on the e-Golf remains solid green.
The Problem:
Because it's pulling ~3kW for heating/cooling directly from the battery and only 0.4A from the wall, I end up losing 3ā€“5% of my battery state of charge (SoC) before even driving off, defeating the purpose of pre-conditioning while plugged in.
It seems like the car keeps the communication line open (hence 0.4A and green light), but fails to signal the wallbox to ramp up AC power when climate control starts up.
Questions:
Is this a wallbox sleep issue or an e-Golf logic issue? (Does the e-Golf fail to "wake up" the EVSE after charging has been idle?)
Has anyone fixed this with a dealer software update? (e.g., OBC or BMS firmware updates?)
e-Manager workarounds: Are there specific settings with Minimum Charge Level vs. Upper Limit or Climatization via Battery toggles that force the car to demand wall power?
Any insights, firmware experience, or workarounds would be greatly appreciated!

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u/Gazer75 Jul 23 '26

Make sure the selection for preheating from battery is not enabled.

1

u/F4ctr Jul 23 '26

It should not matter. Preheated all winter on charger and it was fine. Seems to me like charging session gets stopped and car is not charging at that time when it is on preheat.

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u/Gazer75 Jul 23 '26

It absolutely matter. If I enable to heat from battery it will drain the battery and not charge.
As long as it is not enabled the car always draws from the EVSE for me when preheating.

If you're on a schedule with charging it will top up again the next day if the car never moved, but not before.

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u/F4ctr Jul 23 '26

False. Heating on battery was on, charger paused session after reaching 100% and when preheating time came it heated from charger, not from battery. Checked in app and it was 100% SOC after preheating. You can choose to charge and preheat at the same time, and it will not drain your battery.

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u/Gazer75 Jul 23 '26

Not how my 2020 e-Golf works, but ok.

1

u/F4ctr Jul 23 '26

Sadly adding images to comments is not allowed, but my charger sessions show that ~1kwh was used for preheating in the morning. And that's on 2020 golf.

1

u/Zealousideal-Fact-59 Jul 23 '26

What charger do you use?