Is my heating power consumption correct?

[Ian Robinson]

I seem to use less that 1kwh heating for 7kw driving in the winter, does that seem correct this diaply i think can only show 1kwh blocks so all I know is the heating ls 1kwh or less? - I'm getting 3 to 3.5 mile/kw driving steady so there's a 0.5 to 1kwh increase in use over th summer but maybe that's 'lost' because the batteries are cold . Auto battery heating is off. If anyone in the UK can check theirs that woudl be useful, at the mment there appears no benefit turning the heating down (or heating while plugged in) cheers.

 

[gary333]

I seem to use less that 1kwh heating for 7kw driving in the winter, does that seem correct this diaply i think can only show 1kwh blocks so all I know is the heating ls 1kwh or less? - I'm getting 3 to 3.5 mile/kw driving steady so there's a 0.5 to 1kwh increase in use over th summer but maybe that's 'lost' because the batteries are cold . Auto battery heating is off. If anyone in the UK can check theirs that woudl be useful, at the mment there appears no benefit turning the heating down (or heating while plugged in) cheers.

There's no point heating the batteries at all in the UK if that's what you are asking. Well, that is unless you are planning on taking the car straight out on to the race track from your drive, or live next to a motorway and want to gun it to 70mph.

If you mean internal heating of cabin, then more heat equals more power usage, it's a direct correlation as it's simply a heated coil with a fan blowing the "heat" around.

 

[Anon70]

If I start my car from cold with no preheating it takes about 2 - 3 minutes before warm air starts blowing into the cabin. If you assume the heater is going full blast for that time it would use 0.35 kW (7kW per hour and 3 minutes is 1/20th of an hour, so 7/20 = 0.35). The heater would then cycle on and off as required during the journey.