Taycan 120V charger on a timer…

[Gino]

@Gino You had me at steaks and Cabernet.

I would not be excited about improvising around 40 year old wiring.

I wonder could you get away with a physical heavy duty 15A timer for 120V charging? e.g: https://www.amazon.com/dp/B09K4K25KF

That’s what I’m experimenting with now. It does work but when you leave it plugged in after the timer shuts off the power it drains the main battery 10+ miles in just 30 minutes but I’m not sure if that power drain is real because once I turn the power back on it recovers back 80% of what power the PCM & the app says I’ve lost.
I will be testing to see if this drain is real & how much drain I actually see after 1 hour, 2 hours, 3 hours, etc up to 12, 16 & 24 hours. I’m hoping it doesn’t drain the battery too much but I think the reason it drains the battery is because the electronics never go to sleep when it sees a plug in the charging port.
It displays an error message on the car’s pcm as well as in the app.
This would then be waisting energy every hour you’re not charging and potentially put more stress on the 12v battery.
What I don’t know is what the car does when it reaches 100% SOC? I would think it disconnects the charger to stop additional charging and put the car to sleep. Hopefully it will then wake up again once the port senses power is back on and SOC is below 100%.
It has to cut off the power to the charging port but if it displays an error message indefinitely then the same power drain will happen if the car won’t go to sleep…

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[daveo4EV]

the car charges itself - the external EVSE just provides power upon request of the vehicle - the battery at 100% soc will stop the charging…the external charger is just a "raw AC power feed" - the vehicle and it's software controls _ALL_ charging - the timer will simply confuse the vehicle since it will pop on/off and confuse the car's timer's and profiles

set the timers/profile in the vehicle to charge the vehicle to what ever % SOC you want - and leave it alone - the car will only charge when it needs to.