100% Charge Range Drop

[EVSJ]

Same here, my drive this morning averages 3.5miles/kWh on mainly motorway driving in sub-zero conditions but the car was preheated before leaving. Certainly reduces the drain on heating the cabin up.

There are so many factors at play though, 2.9 is not unreasonable this time of year if you are having to heat the cabin, deal with cold weather, strong winds etc. Clearly check things like tyre pressure, in winter you can end up being well below the recommended level without realising.

[sads45]

I have an Enyaq 80x which is just over 1 year old. On a recent drive of 350 miles, air temperature at 4 degrees, I achieved 2.7 mi/kWh, whilst driving at around 60-65 mph. This is the normal figure I achieve in the winter with less on short journeys.

[asosnikhin]

A great result! 77 kWh multiplied by 2.7 mi/kWh gives 207.9 miles. I wonder if that was a downhill road

[dtwatcher]

I drove almost 100 miles of pure motorway driving at 70mph with little traffic recently (around 5C) and was averaging 3.7mi/kWh (no heat pump) but I pre-heated (plugged in) before I left. The journey back I only got 3.2m/kWh but no pre-heating (similar speed and traffic). I think pre-heating (plugged in) does make quite a difference.

[RallimG]

Preheating (not plugged in) is the killer and when combined with short journeys and minus temperatures makes pretty frightening consumption figures.... I charged mine at work to 72%, 4 miles home and then 2 journeys in the evening with preheating not plugged in, preheated again this this morning and drove back to work.... I parked up with 55% battery - 15miles travelled, 17% battery used...

[Hodgey]

Thanks everyone for the replies, all very reassuring. I was just getting a bit depressed reading previous messages on the thread claiming 5mi/kWh!

[Aragorn]

5mi/kwh is nonsense if you drive the car in any way that resembles normal...

Also, folks like suggesting pre-heating from the mains as a fix, but IMO this is daft as your using expensive day time electricity to pre-heat the car, in order to save some energy from the battery that you put in there very cheaply overnight. Always pre-heat from the battery, unless you actually need to maximise every bit of range, eg embarking on a 300mile journey.

[MacDragon]

I don't have any cheap nightrate electicity where I am - so that is definitely a factor, for me it would be always more economical to heat from wall.

But in everyday usage if got cheap rate electricity and do not need maximum range, then it may make more sense to use battery indeed.

[MK09]

5mi/kwh is nonsense if you drive the car in any way that resembles normal...

Also, folks like suggesting pre-heating from the mains as a fix, but IMO this is daft as your using expensive day time electricity to pre-heat the car, in order to save some energy from the battery that you put in there very cheaply overnight. Always pre-heat from the battery, unless you actually need to maximise every bit of range, eg embarking on a 300mile journey.

Sadly pre-heating from the mains is the only option available to us 2024 model owners with the dodgy 12v battery. Unless it’s plugged in I’ve not been able to use remote heating on mine for weeks.

[CrowSysE243]

5mi/kwh is nonsense if you drive the car in any way that resembles normal...

It depends on what you consider normal, the road types and weather conditions. In the summer using motorways in the south of England and cruising at 60 to 65 I expect to get 5 to 5.5 miles/kWh. Commuting 50 miles to work, 80% on the M3/M25/M23, the roadworks reduce the average speed and I would often get around 6 miles/kWh. In the winter it is lower. In the last week the round trip averaged 4 with the external temperature below 0 and between 0 and 2.5, returning in the evening. I got lower economy driving in Northern Ireland and Scotland than in the South of England. On one day in August consumption was 3 miles/kWh from Dunoon to Oban with the temperature at 13 degrees C and with heavy rain. On short journeys (less than 2 miles) in winter economy has been below 2 miles per kW hour with economy improving until somewhere between 7 and 15 miles. depending on temperature. These are without preheating the car.

Preheating the car improves the driving statistics, because any energy consumed is before the start of the journey but charging with the car plugged in does not necessarily give a significant improvement in range. Tests on my car (2023 iV80 with SW version 3.5) show that power is not drawn from the electric vehicle supply equipment (EVSE/charger) if the car is not charging the battery at the same time.

When preheating the car, as a test, today with Octopus smart charging disabled, the car plugged in and charging immediately stopped and preheating started about 10 minutes later, no current was drawn from the circuit supplying the charger. A peak current of about 15 A was drawn from the HV DC battery, discharging the HV battery charge by about 1.5 kWh.

The step in total accumulated charge corresponds to the time that the cable was connected before charging was stopped.

Over the 30 minutes preheating period the cabin temperature increased from 3.2 to 18.5.

Because the DC to DC converter was switched on, at the same time the the 12V battery state of charge increased from 67% to 91%, dropping to 89% after preheating was completed.

.

Over the period the reported HV battery temperature did not change significantly, with all measurements being between -0.15 and +1 degree.

As has been noted in another thread, the car is quite well insulated.

With or without it though, it's worth noting that the Enyaq is a reasonably well insulated car (especially if your spec includes the acoustic glass side windows).

If the car has seat heating this can be an efficient supplement to Clima heating to maintain a comfortable temperature. I prefer a cabin temperature set to 17, although I would use a higher setting for some passengers. During the last return journey from work, with A/C off as the humidity was low, the temperature stabilised at about 20 degrees, 3 degrees above the Clima setting.

With Octopus smart charging it is likely to be difficult to precondition using grid, rather than battery power. I find that typically smart charging finishes before the "Ready by" time and often when it does the last charging segment is less than 30 minutes so it is unlikely that the car will be charging for a whole 30 minutes preheating period. As, even in winter, the car has good range and even on long journeys I rarely drive much more than about 150 miles before taking a break, and charging during the break, preheating from the battery is not a problem for us, The situation might be different without the heat pump. Having heating on at 17 to 20 degrees only seems to to reduce the range by 2 to 5% in the weather conditions I have experienced. On our Kona, without a heatpump, the reduction is 20 to 25%.