EV’s and the effect of Air Conditioning on battery performance

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    Topic
  • #277477
    Avatar photoSolymar
    Participant

      Now that there is a bit of warm weather with us I was wondering, from those of you with a BEV, what the effect of  having the air conditioning on “cooling” was having on the range performance of the car, if any?

      We know that there is a lot of talk about the effect heating has on a BEV but not much on what cooling does to range?

      For those of us STILL waiting for our electric cars, it would be informative to know from actual owners of their experience!

      Skoda Enyaq Coupe 85x Sportline Plus Adanced, Heat Pump & 21" Supernova Wheels In Moon White Metallic - Ordered 27th December 2023 - Confirmed 31st January 2024 - Build Week 16 (W/C April 15th) Estimated Delivery 26th May. Build Week moved back to week 23 W/C 3rd June) Build Week moved again to week 32 (W/C 5th August)

    Viewing 22 replies - 1 through 22 (of 22 total)
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    • #277479
      kezo
      Participant

        Running the AC, will have a lesser demand than heating a car and will impact the range by around 12ish%

        Preconditioning the car prior to setting off is as important as it is with heating the car. Using ventillated seats will also minimise the use of AC as heateted seats reduce the demand on the heater in the winter.

        For an more realistic answer ask someone like @Phaedra who has the Enyak 🙂

        #277480
        Avatar photoSolymar
        Participant

          If a car with a Heatpump on the MEB platform can help with heating, does it also assist with cooling as domestic heatpumps will or is it just the compressor doing the cooling?

          Also, the cooling of the batteries must help with efficiency so does the heatpump do that or is it the compressor doing the cooling?

          I’ve read a lot about BEV heatpumps but it seems to be a contentious subject.

           

          Skoda Enyaq Coupe 85x Sportline Plus Adanced, Heat Pump & 21" Supernova Wheels In Moon White Metallic - Ordered 27th December 2023 - Confirmed 31st January 2024 - Build Week 16 (W/C April 15th) Estimated Delivery 26th May. Build Week moved back to week 23 W/C 3rd June) Build Week moved again to week 32 (W/C 5th August)

          #277481
          Rich44
          Participant

            With aircon you’re not heating or cooling as such it’s very much like a heatpump it’s moving hot from inside the car to outside because moving energy is much more cost effective than a resistive heater, running aircon has a far less drag on batteries than heating via a traditional resistive load which is horrendously inefficient at about 60-70%

            Heating an EV is say 2kw of which you’re going to feel 60-70% of that as heat.

            Cooling your EV might use again say 2kw to start off as it thrashes to get the temp down but after that say on a longer journey you’re looking at a few hundred watts to keep it ticking over

            A figure bandied about suggests a guesstimate of 7 miles range loss per hour of driving if you have the aircon set to full blast permanently on (which no one would do)

            #277484
            Oscarmax
            Participant

              We are old school I just open the window a little.

              #277488
              kezo
              Participant

                The heatpump will cool the battery and heat the cabin.

                AC uses a compressor.

                #277491
                kezo
                Participant

                  We are old school I just open the window a little.

                  😂😂

                  #277496
                  72 dudes
                  Participant

                    Today we made an 80 mile round trip, most of which was dual carriageway with a bit a crawling through the outskirts of Cambridge.

                    Aircon was set to 17/18, ambient was 21/22 (Mrs 72 Dudes hates being too warm!)

                    At the outset, the guessometer was reading 210 miles, when we got back it still said 165 miles, so despite the aircon on cold, I somehow made up 35 miles with my excellent anticipatory advanced driving skills 😆😆

                    I rest my case m’lud.

                    2024 - BMW i4 Grand Coupe eDrive 35 Sport
                    2020 - Volvo XC40 T4 Inscription
                    2017 - Audi Q3 TFSi Sport S-Tronic

                    #277499
                    Rich44
                    Participant

                      Nice

                      #277502
                      Abercol
                      Participant

                        Just back from a 39 mile trip, only 15 deg here, but aircon is always on on my car, we carry a dog, so its important to keep the cool fresh & filtered air coming in.

                        Trip included sitting waiting on my wife for  an hour with the car in camping (utility) mode with aircon and the stereo on (trip was to take her to the gym for her session with her personal trainer).

                        Switching off aircon at the beginning gained me 1 mile of range. Its pretty much the same regardless of a 10 or 210 mile trip. Kia Soul has a heatpump. Sitting for 1 hour cost me 2 miles of range, pretty much standard, summer or winter as long as the car is where you want it to be temp wise when you park up (she’s been doing these 3 times a week sessions since 2022).

                        In life, it's not who you know that's important, it's how your wife found out.

                        #277503
                        Rich44
                        Participant

                          On a hot day with a toasty car that’s been parked this highlights the benefits of preconditioning whilst plugged in as getting from 30C to 20C in the car takes quite a lot of power maintaining that temp afterwards costs negligible amounts.

                          Same principle with the heatpump indoors leave it on all day at 19C and it’s cheaper than on and off if you ho out, come home etc

                          #277524
                          Avatar photoStuart
                          Participant

                            I don`t see my range drop that much TBH, i leave mine set to auto all the time as per Hyundai recommendations. Then again i also have the ability to link the heated and ventilated seats to the climate control and with the addition of a heat pump that all probably helps. First 5 min of any journey i pop the sunroof on tilt to drag out any stale hot air to further cool the cabin, again only possible if your car has that feature.

                            ----------------------------
                            Hyundai Ioniq 6 Ultimate
                            ----------------------------
                            Scale modeller in my spare time
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                            #277584
                            Ioniq
                            Participant

                              Checked mine today. Set for 18 Deg C, it dropped 6 miles on 200 mile range.  If its hotter it will drop a few .ore miles.

                              It is very accurate, not too shabby really.

                              #277586
                              Phaedra
                              Participant

                                I’ve had the Enyaq 5 moths now.  Apart from keeping an eye on it when charging overnight for any connection or App problems I pretty much ignore anything to do with efficiency or running costs.

                                I know it will give me 3.5 to 4.3 miles/kWh on average, I could probably improve on that but to be honest I really can’t be bothered!

                                As it stands it’s currently giving me 40 miles for 75p, compared to almost £7 in the previous Ateca.

                                Over the 3 year lease (18,000 miles) that will cost me under £340, that’s a massive £2,900 saving compared to the Ateca. In perspective my monthy outgoings on fuel have decreased by almost £80, roughly around an 80- 90% drop.

                                So while I could drive very carefully and eek out few percent increase in the mile/kWh efficiency it represents almost nothing in the actual electricity costs @ 7.5p/kWh.

                                Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!

                                #277640
                                PeterF
                                Participant

                                  ID4 with heat pump.

                                  60 mile round trip with no pre conditioning.

                                  First day I had no AC on, the next I did. Similar outside temps and conditions. Only used 1% more with AC on.

                                  #277991
                                  Avatar photoSolymar
                                  Participant

                                    Thank you to those of you who took the time to reply & add information to the topic.

                                    I think the results so far show that having the aircon on cooling has little effect on range or performance. So it will be nice to turn the cooling up on hot days without much worry, especially if getting caught up in holiday traffic jams!

                                    I just need my car now to try for myself!

                                    Skoda Enyaq Coupe 85x Sportline Plus Adanced, Heat Pump & 21" Supernova Wheels In Moon White Metallic - Ordered 27th December 2023 - Confirmed 31st January 2024 - Build Week 16 (W/C April 15th) Estimated Delivery 26th May. Build Week moved back to week 23 W/C 3rd June) Build Week moved again to week 32 (W/C 5th August)

                                    #277993
                                    bigmac7288
                                    Participant

                                      I’ve had the Enyaq 5 moths now. Apart from keeping an eye on it when charging overnight for any connection or App problems I pretty much ignore anything to do with efficiency or running costs. I know it will give me 3.5 to 4.3 miles/kWh on average, I could probably improve on that but to be honest I really can’t be bothered! As it stands it’s currently giving me 40 miles for 75p, compared to almost £7 in the previous Ateca. Over the 3 year lease (18,000 miles) that will cost me under £340, that’s a massive £2,900 saving compared to the Ateca. In perspective my monthy outgoings on fuel have decreased by almost £80, roughly around an 80- 90% drop. So while I could drive very carefully and eek out few percent increase in the mile/kWh efficiency it represents almost nothing in the actual electricity costs @ 7.5p/kWh.

                                      You put £7 in ur far when you had fossil fuel?? Who does that?

                                      or are you just guessing? making ur post highly inaccurate as I could go and put £7 in my car i would get more that 40mils on the clocks

                                      #278000
                                      Ioniq
                                      Participant

                                        @bigmac7288

                                        You are getting a bit mixed up, and its understandable.

                                        Essentially Phaedra was trying to equate fiel costs between an EC and ICE vehicles and using the cost of a gallon of petrol as a denominator.

                                        He is correct, petrol is about £6.50 to £7.00 gallon. My last ICE car managed 33mpg over 3 years, so yes, i would get about 33-40 miles on £7.

                                        Phaedra is also saying that 40 miles in an EV cost him 75p.

                                        Hopefully that makes more sense to ya. It is difficult trying to equate 2 different systems.

                                        But it boils down to this. Filling my tank in my ICE car cost £70.

                                        Filling the tank on my EV  cost £7.

                                        Certainly the ICE  car had 20 more miles capacity than the EV.

                                        #278007
                                        bigmac7288
                                        Participant

                                          @bigmac7288 You are getting a bit mixed up, and its understandable. Essentially Phaedra was trying to equate fiel costs between an EC and ICE vehicles and using the cost of a gallon of petrol as a denominator. He is correct, petrol is about £6.50 to £7.00 gallon. My last ICE car managed 33mpg over 3 years, so yes, i would get about 33-40 miles on £7. Phaedra is also saying that 40 miles in an EV cost him 75p. Hopefully that makes more sense to ya. It is difficult trying to equate 2 different systems. But it boils down to this. Filling my tank in my ICE car cost £70. Filling the tank on my EV cost £7. Certainly the ICE car had 20 more miles capacity than the EV.

                                          Perfect reply thanks for clearing that up was a bit lost on the £7 filling ur tank. Im not against EV tried to get one my self but sadly since I need to use the Mobility grants system they don’t seem to want to give a grant for a electric vehicle so it was petrol for me but managed to get parents to upgrade to HEV.

                                          #278010
                                          Rich44
                                          Participant

                                            They just gave me a £2000 grant for an EV after I explained why I would only accept one. They were pretty good about it actually.

                                            #278011
                                            DumfriesDik
                                            Participant

                                              We use the heating/cooling as we would any vehicle. We don’t hypermile and rarely go anywhere near the full range of a single charge.

                                              We usually charge the battery to 80% but if we know we are going on a decent journey it gets bumped up to !00%. The extra 20% is more than enough for heating/cooling.

                                              This time of year we easily attain 4.2 mils/kWh, with air con on. A range in excess of 200 miles.

                                              VW ID3 Max is my DD

                                              #278016
                                              Vinnie
                                              Participant

                                                We do exactly the same, drive it like any car and just enjoy the journey, Toyota state it’s okay to charge to 100% from a home charger but from a supercharger just to 80%, and that’s what we do; averaging around 4 mpk.

                                                #278021
                                                John Newton
                                                Participant

                                                  As above but the Toyota doesn’t lose a lot of range with ac

                                                  From April 2024 Toyota BZ4X

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