this post was submitted on 25 Jul 2023
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The only case where this is true is if you use DC-Fast charging all the time. AC charging is usually around 40ct/kWh in Germany, which with a modern EV with 16-20kWh/100km is between 6,40€ and 8€ per 100km. A bit more due to charging losses, but thats not that much on modern cars. 7-9€ is the maximum. 16-20kWh is for a car like an Kia EV6 though, which is a higher-end car. If you compare that to a similarly priced ICE car, e.g. an Mercedes C-Class which uses ~6.5l/100km, you pay 11,50€/100km with the current prices of 1,75€-1,80€ per liter. For your daily business where you only drive from home to the office it's totally feasible to use AC-charging 99% of the time.
DC-Fast charging is more expensive with ~70ct per kWh, but only useful if you do long distance trips. On long distance your car needs more energy than in the city (due to regenerative braking not doing that much), so at least 14€/100km with 20kWh/100km, probably ~16€ realistically. Compare that to Autobahn gas stations with ~2,30/l-2,40€/l and you get 15€/100km for the C-Class though. So even then its not drastically more expensive, if you directly compare the prices which most people pay on long-distance trips.
HOWEVER! You can of course drive your gas car to gas stations a bit further away from the Autobahn and save quite a lot, filling up the car for the non-Autobahn gas prices again. Thats not possible with EV fast charging, since DC-Fast charging costs the same everywhere.
HOWEVER AGAIN! If you don't drive long distances regularly, which most people don't do, you will save a significant amount of money since charging is cheaper than gas.
Admittedly I haven’t ran the numbers yet but based on my budget consumption I am clearly burning it faster since I switched to EV. I don’t know what you got wrong but in my particular case it is more expensive. I will run out of budget. Top of mind I can already say that before I topped up twice a month while now I charge every 3 days. And I didn’t change my driving behaviour.
With you not changing your driving behaviour that also doesnt make sense. If you topped up twice a month, thats ~1400km a month of driving? So ~50km per day, which would mean your EV has to be charged every 150km?
The tank was about 800km so slightly above your estimate. The EV6 reports an average consumption of 19,58kwh/100km. Slightly above your very conservative estimate. In addition we went on holiday as mentioned so that affected my average.
Can’t say for sure but this is my measurable experience…