Traffic jam heating in EV's

freddyuk

How have you EV owners managed when stuck in snow traffic jams? If you are stuck using the heater at what point do you decide to turn off the heat so you can get home? I think there is an algorithm that sorts out mileage/heater use so it will switch off the heat when the home mileage limit is reached?
As you probably don't venture far away it may not be a problem but I can see it being an issue if we get snow as last year when we got stuck on way to the airport because lorries failed to climb a small hill in Innishannon and we were stuck for a long time. Without any charging points in rural areas it must be a worry.

mordeith

I don't the snow is bad enough that you think you're going to freeze if you have to turn the heater off.

gctest50

Buy a cab heater for it, like in motorhomes/ trucks

https://www.ebay.co.uk/itm/AIR-TOP-2000-STC-12V-DIESEL-CAMPER-BOAT-HEATER-DIGITAL-SMART-CONTROLLER/332465515989?_trkparms=aid%3D333202%26algo%3DCOMP.CATCARDS%26ao%3D1%26asc%3D20180608100040%26meid%3D1139c948d0474adcb16ee34b22b5cb95%26pid%3D100889%26rk%3D1%26rkt%3D1%26sd%3D112298268024%26itm%3D3324655159

ELM327

once the cabin is already heated, maintaining heat often uses less than 1kW. So in one hour it would use 1kWh, or less than 4% of the battery in my Ioniq,

Not an issue.

Gumbo

freddyuk wrote: »

How have you EV owners managed when stuck in snow traffic jams? If you are stuck using the heater at what point do you decide to turn off the heat so you can get home? I think there is an algorithm that sorts out mileage/heater use so it will switch off the heat when the home mileage limit is reached?
As you probably don't venture far away it may not be a problem but I can see it being an issue if we get snow as last year when we got stuck on way to the airport because lorries failed to climb a small hill in Innishannon and we were stuck for a long time. Without any charging points in rural areas it must be a worry.

I've never turned the heater off.
I drive 100% with the heater and AC on. 50% of the time i'll have the heated steering wheel on too.

ELM327

+1
For me heating is always set to 22, auto and heated seats on.
The only concession for range is if there's only me in the car it's set to "driver only"

slave1

Heating and AC on always, I want comfort and don't want a stuffy/damp car.
Look up people complaining of stuffy/damp/mouldy cars and the don't use AC so same state air in car constantly.
Outside AC and Heating on always

Those with heat pumps will suffer a lot more energy consumption when the heat goes below 5 Deg C and more and more as the temp gets lower and the heat pump is worthless. Of course all heaters have to work harder as the temps drop the heat pumps as small as those in cars are not efficient at lower temps.

In the Leaf I noticed consumption far higher below 3 degrees C and far greater below 0 Deg C. I often saw 3 Kw being regularly consumed. That's 3 Kwh in an hour that could be up to 15-20 Km range.

No telling what the i3 consumes as BMW keep all that secret lol. I don't have the heat pump with the Rex don't really need it. I have the temp set to 23 Degrees all the time.

ELM327

I've seen 6kW being drawn from the heater when it is cold and I didnt preheat. ..

Silent Running

freddyuk wrote: »

How have you EV owners managed when stuck in snow traffic jams? If you are stuck using the heater at what point do you decide to turn off the heat so you can get home? I think there is an algorithm that sorts out mileage/heater use so it will switch off the heat when the home mileage limit is reached?
As you probably don't venture far away it may not be a problem but I can see it being an issue if we get snow as last year when we got stuck on way to the airport because lorries failed to climb a small hill in Innishannon and we were stuck for a long time. Without any charging points in rural areas it must be a worry.

Yeah, I just make sure I don't venture out of the driveway, so not an issue. :rolleyes:

freddyuk

Silent Running wrote: »

Yeah, I just make sure I don't venture out of the driveway, so not an issue. :rolleyes:

So what is your range exactly as this was an enquiring post not a wind up....?

Silent Running

freddyuk wrote: »

So what is your range exactly as this was an enquiring post not a wind up....?

Normally around 200kms winter and at least 275kms in Summer.

I'm off on another long haul to Hertfordshire on Tuesday. I have no fear of long journeys. This will bring my range down a bit as it's nearly all fast motorway.

DesperateDan

Anyone have any idea roughly how much house electricity preheating a car in the cold weather would use? I am thinking preheating to 26 degrees is actually probably quite expensive...

mordeith

DesperateDan wrote: »

Anyone have any idea roughly how much house electricity preheating a car in the cold weather would use? I am thinking preheating to 26 degrees is actually probably quite expensive...

No idea. I don't care getting in this morning after activating it from my phone. :-)

unkel

DesperateDan wrote: »

Anyone have any idea roughly how much house electricity preheating a car in the cold weather would use? I am thinking preheating to 26 degrees is actually probably quite expensive...

26C is quite warm coming from the -3C it was this morning. Ioniq has a 7kW heatpump and I'd say it would take about 3-4 minutes to get that warm.

So say 7kW *(3.5minutes/60) = 0.4kWh, at 8c night rate that would cost about 3 cent

slave1

I was parked outside this morning when the young wan was getting grinds, -4 and I sat in the car with it at 24, used 5% in an hour (L30)

KCross

unkel wrote: »

26C is quite warm coming from the -3C it was this morning. Ioniq has a 7kW heatpump and I'd say it would take about 3-4 minutes to get that warm.

So say 7kW *(3.5minutes/60) = 0.4kWh, at 8c night rate that would cost about 3 cent

I havent looked at the spec sheet of an Ioniq but usually when they quote the kW figure of a heat pump it refers to its output, not its input.

So, a 7kW heat pump that is, lets say 300% efficient (typical of A2W heat pumps), is actually only consuming 2.3kW from the battery to give you that 7kW output.
That efficiency figure drops considerably the colder it gets.

TL;DR... its likely that the cost is much less than your 3c!

DesperateDan

Wow okay that's brilliant I was envisioning it turning on half an hour before the schedule and drawing loads while it was on.

Preheating does not use the heat pump as heat pump comes on only when the car is turned on.

Yes , preheating consumes energy but who cares, it's a lot cheaper than the most efficient diesel !

From 3 degrees and below heat pump is next to useless anyway.

creedp

Silent Running wrote: »

Normally around 200kms winter and at least 275kms in Summer.

I'm off on another long haul to Hertfordshire on Tuesday. I have no fear of long journeys. This will bring my range down a bit as it's nearly all fast motorway.

What do you mean when you say you have no fear of long journeys? Can you reliably recharge on FCPs or is it the case that you are under no pressure to get to your destination and therefore can afford to hang about for hours watching other EVs charge at single point chargers?

Gumbo

creedp wrote: »

What do you mean when you say you have no fear of long journeys? Can you reliably recharge on FCPs or is it the case that you are under no pressure to get to your destination and therefore can afford to hang about for hours watching other EVs charge at single point chargers?

Or possibly never has to or rarely has to travel outside the range of his actual car. Buy the car suitable for your needs is the best advice.

Silent Running

creedp wrote: »

What do you mean when you say you have no fear of long journeys? Can you reliably recharge on FCPs or is it the case that you are under no pressure to get to your destination and therefore can afford to hang about for hours watching other EVs charge at single point chargers?

I've not had much trouble with FCPs. I rarely need to queue. Most of my rapid charging is done at MSAs which seem to be used less by local free chargers than Urban units.

Fast chargers like Naas or Lucan, located in shopping centres, are always going to be an issue. As are units near built up areas. Those just looking fro a free charge aren't inclined to go to a MSA because they would have to travel to the next exit to get back off the motorway.

When I travel across the water I'm tied to the sailing times of the ferry so I need to make sure I plan well for the return journey. Hertfordshire to Pembroke Dock is a long run and there is a large CCS gap from Membury services on the M4 to Cardiff gate services. If one or the other is OOS it makes the gap bigger, and I need to work in chargers off the main line. The most frustrating thing is Leaf drivers using the triple head charger while the Chademo unit beside it is available. :mad:

I think you need a sense of adventure to drive an EV.

creedp

DesperateDan wrote: »

Anyone have any idea roughly how much house electricity preheating a car in the cold weather would use? I am thinking preheating to 26 degrees is actually probably quite expensive...

I preheat each morning up to 18c as I don't like a hot car and that consumes between 0.7 and 0.9 kWh per charger