#### philnewmerc

##### Active Member

Travelling at 85mph (as is the unofficial uk speed limit ) I estimate (from forum posts) the EQE consumption will be very lucky to get 1.5 m/kwh, but I will be generous. At 70 mph it'll be about 2.3 m/kwh (trip computer not true calculation - according to a Carwow test). The AMG gets about 22-23 mpg (real not trip computer) at 85 (real not speedo) and about 25-26 mpg at 70 mph. Long term mixed driving m/kwh seems to be around 2 ish mpkwh in cooler climates like the UK. My personal mixed mpg is around 22 mpg.

So:

Charging on the motorway is 75p/kwh, at a consumption rate of 2.3m/kwh at 70 mph that's 33 pence per mile for EQC. AMG cost (on motorway using 98 ron at exorbitant £1.80/L) is 751 pence per gallon, so at 25 mpg that's 30 pence per mile. I.e. slightly cheaper (cheaper still if i drove 2 miles off motorway to get cheap petrol).

But at 85 mph:

Charging on the motorway is 75p/kwh, at a consumption rate of 1.5 m/kwh at 85 mph that's 50 pence per mile for EQC. AMG cost (on motorway using 98 ron at £1.80/L) is 751 pence per gallon, so at 22 mpg that's 34 pence per mile. I.e. much cheaper.

Now overall daily use mpg vs m/kwh and charging at home:

From forum posts and tests, eg Auto Express, when driven pretty gently, as EV drivers tend to do, 2.4 m/kwh ave seems a generous assumption but I'll stick to it (2 seems closer). Note though that if I drove like an EV driver I'd get a pretty good 25 mpg (21-22 is my own swifter-driving average) i.e at normal fuel prices of 700p for a gallon that is 28p/mile. Off peak cheapest electricity deal for my address is 9.5 p/kwh (and 32 p in the day plus 57 p standing charge). EVs use about 15% more kwh than rated due to heat losses (and preheating) while charging. So to put 150 miles in the EQC in the early hours of the morning will need 150m/2.4m/kwh*9.5p/kwh*115%= 683 pence (£6.83). For the AMG it would need 150m* 28p/m = 4200 pence (£42). Massive difference but with such a small range this figure assumes non-exorbitant charging is required to get home!

Unfortunately I do not have easy access to charge overnight and I doubt the majority do either... On a plus point, I can use my heating and air con whenever I please . Obviously I have ignored road tax, depreciation, etc etc etc.

The real world range of the EQC seems to be about 150 miles, but that's assumes you can get it up to 100% and don't mind going down to close to 0%.

Conclusion:

EVs are perfect if you drive around your local area a lot, or town, don't go more than 75 miles (150 total) away from home, you drive slowly on motorways (EV forums are full of people chatting about slip streaming lorries ) , you have a convenient place to plug in at home overnight, don't go on holiday, don't charge outside of home, and probably most importantly, you are a top rate tax payer who essentially gets the car for 40% off list courtesy of the government via salary sacrifice or BIC.. on that front it just seemed like an excellent deal tbh, although the EV equivalent car does tend to cost 30 to 40% more than the ice model anyway? For a private buyer I am still not sure they make sense except as town cars where they make excellent sense.