The Energi PHEV's also have GO Times just like FFE, where it heats the interior using only electric power available from the BCCM (charger), but mind you these only have a 3.3kW charger (air cooled, as is the battery, unlike the FFE).
The GO Times seem to begin the preheat process more than 30min before the set time in my observations. Also there is Remote Start but I have witnessed it starting the engine to heat things up faster when it's cold out.
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)