Is my calculation close?

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    Topic
  • #319114
    GaryV
    Participant

      I fully understand that charging EV’s at home is the way to go.

      I’m toying going electric so doing research and homework.

      Looking at extreme, I’ve calculated that doing a 20 – 80% (60%) charge at a fast charger on an Ioniq 5 84kwh @ 80p/kwh is around 50kwh costing £45.

      That would give about 150 miles. My current 1.2 petrol costs about £60 to fill and would give minimum 500 miles so the same 150 mile cost would be £18.

      That’s 2½ times more. If I’m anywhere close then what’s the point?

      If I do go EV I can see us using the wife’s petrol for any journey over 300 miles.

    Viewing 18 replies - 1 through 18 (of 18 total)
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    • #319116
      Peedyex
      Participant

        We have had an EV for almost a year.  If you cannot charge at home, an EV will cost you more than petrol or diesel.  The UK has appalling high charges for charging with public chargers compared to France.  There are many excuses given whenever you mention this but there are two companies in the UK… Tesla (avg 55p)and AW energy (39p) …. Who do a reasonable price (still more than the best in France). An added 3p per mile (which will rise) improves nothing.

        Slower public chargers can be cheaper but still relatively high…. Possibly slightly less than petrol.

        We do not regret our EV – we wouldn’t change back, but we charge at home.

        If Electricity companies charge more at home, that may change our view.

         

        #319123
        Rhodgie
        Participant

          Now do the sums where you only refill the ICE car at motorway services (the dearest cause that’s what you’ve done with the Ioniq) and recharge your EV at home (between 7p to 24p depending on your tariff?)

          I happily drive my EV from Glasgow to the NEC Birmingham and if I need to recharge use Ionity (43p) or Tesla (40p), both with a £10 monthly subscription.

          #319124
          GaryV
          Participant

            Now do the sums where you only refill the ICE car at motorway services (the dearest cause that’s what you’ve done with the Ioniq) and recharge your EV at home (between 7p to 24p depending on your tariff?) I happily drive my EV from Glasgow to the NEC Birmingham and if I need to recharge use Ionity (43p) or Tesla (40p), both with a £10 monthly subscription.

            I totally get that, I was just shocked at gap.

            I’ve never filled up on a motorway but never had to because a 500 mile range allows it. With a 300 mile range I should still be able to manage.

            Out of interest, do you know the Ionity & Tesla rates without subscription or what discount is? If it’s around 20p then £10 subscription means anything over 50kwh and it’s paid for itself.

            Just watched a YouTube video and approx break even point is 45p / kwh if petrol is around £1.40.

            I’m confident I’d be better off as estimate ¾ of charging will be at home at 7p.

            The guy in video refers to “destination chargers” usually around 40p and charge at around 30kw. So under 2 hours for a 20 – 80 charge. It takes my misses longer than that to have a pee, coffee then another pee 😫

            #319125
            DumfriesDik
            Participant

              I remember in August last year (2024), you asked about home chargers, you’re doing some toying!

              Remember that the beginning and end of you journey, you can fill up at home for 7p/kWh. You only pay the premium price when you are away from home.

              So, on a planned journey of 500 miles, you start with a full tank and drive for 300 miles. You top up 200 miles at 55p or roughly 50kWh x 50p = £25. Top right up at home at 7p is about £6 making the total for a 500 mile journey £25 +£6 = £31.

              And that is in a much bigger and more comfortable car!

              What ever you decide, it has to be right and work for you.

              Skoda Enyaq Race Blue

              #319126
              Avatar photoAbercol
              Participant

                If you are charging at home on a smart tariff, then your overall fuel costs compared to ICE is very low, even with the odd long trip and exorbitant public charging fees.

                I’ve done 10,000 miles in my Ioniq 5 84kw AWD this year, that includes two long trips of around 2000 in total, one to the lake district and one to the South of England from NE Scotland. My total “fuel” bill is just under £500. Your bill in your 1.2 petrol 500 mile for £60 car is £1200. My car’s average consumption is 3.2 m/kw, but I don’t drive below 70 on main dual/motorway routes, usually sit at 75 or above. All my refuelling was done at Tesla (without subscription) except one Gridserve fill in Ashford, Kent (no nearby Tesla units).

                We’ve also done a lot of 2-300 mile jaunts where I’ve just charged up, driven to the likes of Glasgow and back (240 mile trip) and arrived home with plenty left. I was surprised at one such trip in summer, covered 265 miles and arrived home with 84 miles left. Admittedly it was hot, the route was mostly 60mph A & B quiet Scottish roads, but still impressed).

                Your example is also flawed if you have home charging, you set off full, so your first 200-250 miles are covered by your initial £5.60 home fill.

                 

                 

                 

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

                #319131
                kezo
                Participant

                  Now do the sums where you only refill the ICE car at motorway services (the dearest cause that’s what you’ve done with the Ioniq) and recharge your EV at home (between 7p to 24p depending on your tariff?) I happily drive my EV from Glasgow to the NEC Birmingham and if I need to recharge use Ionity (43p) or Tesla (40p), both with a £10 monthly subscription.

                  No body in their right mind would refill an ICE car on the motorway  and would expect an EV driver to pull off if theres no cheap chargers like Tesla. Oh! don’t forget to include the monthly charge!

                  #319132
                  GaryV
                  Participant

                    I totally get all the comments and appreciate the feedback.

                    As already stated, I’m sure I’d be better off. I’m also not thick and unless desperate I wouldn’t charge at 80p if I could get 40p slightly slower.

                    The only time I think I’d be out of pocket would be when away on a road trip hol. Even then with a bit of planning I reckon I could break even compared to a ICE.

                    I was just a bit surprised that worst case scenario it can be so much more expensive.

                    People seem to be very defensive with replies so apologies if anyone has been offended by the post.

                    #319134
                    DumfriesDik
                    Participant

                      It seems to me that you have done plenty of calculations. One that you haven’t mentioned, though, is the cheap 7p rate overnight. If you can shift your white goods to run then, you will save even more.

                      Skoda Enyaq Race Blue

                      #319140
                      GaryV
                      Participant

                        It seems to me that you have done plenty of calculations. One that you haven’t mentioned, though, is the cheap 7p rate overnight. If you can shift your white goods to run then, you will save even more.

                        Have already gone down that route. A 10 – 100% charge would only cost £5.30 on an Ioniq 5 which is a real bargain. It equates to under £11 compared to £60 for current petrol car.

                        Currently with eon and done some rough calculations switching from 22p / kwh to 7p & 30p and standing charge stays at 50p / day.

                        Bizarrely, when I initially looked on their app it said Ioniq 5 was compatible with their smartdrive tariff at 6.5p but now it says its not. Put MY25 & 84kw rwd both times.

                        #319142
                        DumfriesDik
                        Participant

                          Ah right, EON are offering a very similar thing to Octopus with IOG.

                          What I was driving at is, there is a domestic saving to be taken into account that you don’t get with an ICE car. Regardless, you seem to have a good handle on it.

                          When is your contract due up?

                          Skoda Enyaq Race Blue

                          #319143
                          GaryV
                          Participant

                            Ah right, EON are offering a very similar thing to Octopus with IOG. What I was driving at is, there is a domestic saving to be taken into account that you don’t get with an ICE car. Regardless, you seem to have a good handle on it. When is your contract due up?

                            3 yrs is 4th May but can put pen to paper from 3rd Feb so got fingers crossed things stay roughly where they are ATM when Jan list comes out.

                            #319146
                            DumfriesDik
                            Participant

                              I’ve had an EV for two or three years now and not looked back. I think I said that in a previous reply to you! I put on solar and a battery a month or so ago and my peak electric is now about a quid a month!

                              Skoda Enyaq Race Blue

                              #319151
                              Avatar photoAbercol
                              Participant

                                Nah, not defensive, just giving my experiences with the same car (slightly worse consumption due to AWD). Been EV since mid 2021, not going back unless it becomes crazy expensive.

                                If you can charge at home its a great saving over petrol prices, I was paying £3500 a year on diesel when I went EV in 2021, my first years bills were just over a 1/4 of the cost.

                                DumfriesDik is correct, the load shifting of household electric along with charging has seen me average 16.5p per kw since moving to Octopus. That’s better than I was getting on a fixed deal in 2019.

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

                                #319154
                                kezo
                                Participant

                                  People seem to be very defensive with replies so apologies if anyone has been offended by the post.

                                  You make a very good point using public chargers and IMHO, if you 70-80% of your journeys can be done charging at home, it will still be cheaper to have an EV than petrol, providing your happy with having to stop off to charge every 250-300 miles.

                                  You mention the Ioniq 5 which has a useable capacity of 80kWh and an real range of 280 miles according to EVdatabase, which is pretty accurate. Remembering, the use of heating, AC, along with the faster you go all have an effect on range, to varying degrees.

                                  Real Range between 195 – 400 miles

                                  City – Cold Weather 275 mi
                                  Highway – Cold Weather 200 mi
                                  Combined – Cold Weather 235 mi

                                  City – Mild Weather 410 mi
                                  Highway – Mild Weather 255 mi
                                  Combined – Mild Weather 320 mi

                                  Indication of real-world range in several situations. Cold weather: ‘worst-case’ based on -10°C and use of heating. Mild weather: ‘best-case’ based on 23°C and no use of A/C. For ‘Highway’ figures a constant speed of 70 mph is assumed. The actual range will depend on speed, style of driving, weather and route conditions.

                                  https://ev-database.org/uk/car/2236/Hyundai-IONIQ-5-84-kWh-RWD

                                  To compre to your current ICE that will cost £60 to fill up and a hypothetical 500 mile trip.

                                  If you did this in the colder weather in the Ionoq 5, you would add 80kWh at home, which would cover your first 235-250 miles and you would need another 80kWh to get home (price per kWh x 80 + subscription charge), you would then top back up cheaply when you got home.

                                  Doing the same journey in summer, based on the same principle of charging to full at home you would need to find around 45kWh to get back home, where you would trcharge cheaply.

                                  Of course all this is hypothetical, as there are s many variables as you could be Stirling Moss like @Abercol or boy racer like @MFillingham or drive like Miss Daisy and happy to do so in a fridge wiyh no heating😂 On a serious note, if yu thinking of the Ioniq 5, hese two are the one to speak with!

                                   

                                  #319157
                                  Jojoe
                                  Participant

                                    I regularly drive to Cornwall and back from the Northwest of England, with some driving in Cornwall as well. In the Skoda Enyaq using Tesla I spend around £110 plus maybe £7 charging up at home before I go and another £5 when I get back.

                                    In the previous Octavia 1L mild hybrid  I would put £70 in before we left, another £50-£60 driving around Cornwall and then another £70 filling up when we got back. If you choose the cheaper charging options it still works out cheaper. The big saving as Dumfries points out, is your filling up cheaply before you go and cheaply when you return.

                                    #319766
                                    MFillingham
                                    Participant

                                      Gridserve have a rolling membership, £7.49 (IIRC) per month for a healthy discount.  Quite useful as they’re conveniently placed but bloody expensive without that discount.

                                       

                                      As for the Ioniq 5, driving normally with cooling on on a May Bank Holiday weekend I drove from Camborne, Cornwall to Kent, first stop was Exeter services, no charge done, second stop was Fleet Services, M3 Hampshire, where I felt it best to charge, that was 243 miles in one charge with 30odd left.  Charge still took only long enough to wander in for the usual relief and pick up refreshments.  25 minutes had us back on the road, which in a busy service station outside of London was about as short as I could stop regardless of the vehicle being driven.  The 800v architecture can, when connected to the right charger, really mean you’re good to go stupidly quickly, on the way home from Kent I stopped to eat at Exeter and plugged in whilst eating and by the time I’d parked, visited the loo, bought food and got back to the car, ate and put rubbish in the bin, I disconnected the car at full, absolutely fully charged.  It was only three quarters of an hour or so having arrived at a touch under 15%.  The MGZS I had before needed all 45 minutes plus a bonus 20odd to get up to 85% of it’s 45kWh battery and that was only around 100 miles.

                                       

                                      If you need a comfortable car with plenty of boot space that very comfortably takes 4 adults for 250 miles, the Ioniq 5 is a magnificent choice.  The niggles I’ve found after nearly 2 years are the lack of rear wiper (solved on the newer range) and the slope of the boot for when we need the Mrs’ walker plus luggage.  It’s a long boot that doesn’t have a lot of height by the door.

                                      I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
                                      I'll try to give my honest opinion but am always open to learning.

                                      Mark

                                      #319769
                                      Doughnut
                                      Participant

                                        I’m still on the verge of going EV regardless of it being with Motability or buying my own. The issue for me is I recently had a botched electrical install by a so-called regulated electrician that requires work before the EV charger can go in.  I either have to stump up over £600 to sort the bodge out, or let it go through the kwango regulator which could take many months to resolve.

                                        Another option is to buy a small city car, handback my Motability car and forget EV exists – for a while.

                                        #319770
                                        MFillingham
                                        Participant

                                          I’m still on the verge of going EV regardless of it being with Motability or buying my own. The issue for me is I recently had a botched electrical install by a so-called regulated electrician that requires work before the EV charger can go in. I either have to stump up over £600 to sort the bodge out, or let it go through the kwango regulator which could take many months to resolve. Another option is to buy a small city car, handback my Motability car and forget EV exists – for a while.

                                          I’m sorry to hear about the installation problems, it’s not until stuff goes sideways that you realise just how much you’re out on your own or taking forever to get a resolution.  Have you tried stomping all over his social media?  Nothing hurts like bad publicity and an electrician with botched work not being fixed really will hurt his business.

                                           

                                          EVs are great around town.  They might not be at their most efficient but they don’t have that period where oils are still cold and ineffective. You can just jump in and go, knowing that you’ve not just taken a charge out of the battery to get it started and that it needs to run for a while to lubricate everything, the motors will run and the battery still provides the power it’s just running temperatures and that’s always an issue regardless of power source.

                                          I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
                                          I'll try to give my honest opinion but am always open to learning.

                                          Mark

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