Why does manual pre-conditioning not use shore power?

[whitex]

Not if my cheap charge period runs until 5.30am and I want to leave at 8am

Lol, I just edited to add that caveat, then I saw your reply. You are correct, you cannot preheat hours ahead of time, though if it's really cold, perhaps set a timer for 5:20am, the car will preheat on cheap power, then 2.5hrs late you will use less battery to preheat again as hopefully the car retained some hear from 2.5hrs earlier.

Sponsored

 

[irrelevant]

Seems a lot of effort to save a few pennies, with a car that costs tens of thousands of dollars in depreciation (feel free to convert to appropriate metric units).