" MX30 COOLING SYSTEM"
A refrigerant tube heat exchanger, attached to the bottom of the battery module, keeps the battery at the right temperature for optimal operation in any
circumstances. This works together with the climate control system, to optimise the performance of both air conditioning and battery.
The battery heater is operated off the thermal pump (heat pump). Most EV heat pumps consume less that 1kwh I believe...no idea if the MX30 is in that range. If my thinking is correct the car charger provides 6.6kwh. I assume you have no idea when the heater kicks in and when it goes off? It should kick in at -5 and go off at >10 and give a dash indication. I also assume you don't precondition the car internal heating system as that will draw off the batteries.....I believe
We don't experience such extreme temperature in most parts of the UK so you can speak from experience whilst we, mainly, talk from theory. So the car is plugged in with no schedule on the charger or car, just set to 100% to turn charging off. The car should detect the charger is still plugged in and available and when the battery heater demand kicks in it should signal the charger to provide power directly to the battery heater without touching the batteries...according to Mazda Europe. But your valuable experience is telling us otherwise...Good to know.