I have some trip coming international for 6 months!
I wonder what should I do with Tesla Model X and charging. Should I leave it fully charged? Should I leave it empty?
Any idea?
Should I postpone my Tesla Model X delivery for after trip?
Same advice since Roadster days... The Roadster had something called Storage mode.
The S folks adjusted to something similar by putting the car at 50%. I would suggest doing the same thing with your X.
Leave either car plugged in to a 240V source at all times. The car will lose capacity due to vampire drain every day, when it hits the 50% it will maintain it at that.
With the S and X, you have the benefit of built in telematics, with Roadsters we added OVMS to do that. So, check on the car every few days. Make sure you have somebody you trust that can check in on your car/house, etc. to re-seat the cable if you need that done (in case of anything, power outage, whatever.)