General > General Technical Chat
why is the US not Metric
Simon:
Yes but the average person cannot just look up wikipedia and find out the power density of petrol and calculate tho W/mile and compare it to the figures given for EV.
Rerouter:
I did not say that... ok, example time.
Take a fancy Model S, Its a 85 KWh battery,
Its range is about 400 Km
And right here it costs 32c/KWh
.... $27.2 for 400 Km
Petrol here is about $1.30/L
so I could buy 20L for the same price
So 20L / 400Km
= 5L / 100Km equivalent,
I can buy a number of much cheaper cars that average about 6-6.5, So you don't save that much unless someone else is paying for the power.
Simon:
Well veering off topic again but last time i worked it out with a economy 7 tarriff here in the UK at 8p/kWh I could run a car at break even price with petrol including battery lease if i did at least 7000 miles per anum. Petrol has risen in price since I did that calculation based on 250W/mile.
My current tarif mirrors wholesale prices and i can charge even less than 8p/kWh most of the time at night:
00:00 - 00:30 6.30 p/kWh
00:30 - 01:00 4.20 p/kWh
01:00 - 01:30 4.20 p/kWh
01:30 - 01:00 5.80 p/kWh
01:00 - 01:30 5.86 p/kWh
01:30 - 02:00 3.76 p/kWh
02:00 - 02:30 5.46 p/kWh
02:30 - 03:00 4.79 p/kWh
03:00 - 03:30 3.99 p/kWh
03:30 - 04:00 3.61 p/kWh
04:00 - 04:30 4.37 p/kWh
04:30 - 05:00 4.45 p/kWh
05:00 - 05:30 5.21 p/kWh
05:30 - 06:00 6.30 p/kWh
06:00 - 06:30 6.30 p/kWh
06:30 - 07:00 7.14 p/kWh
07:00 - 07:30 5.57 p/kWh
07:30 - 08:00 6.72 p/kWh
08:00 - 08:30 4.47 p/kWh
08:30 - 09:00 6.72 p/kWh
09:00 - 09:30 6.30 p/kWh
09:30 - 10:00 6.09 p/kWh
10:00 - 10:30 6.30 p/kWh
10:30 - 11:00 6.30 p/kWh
11:00 - 11:30 7.14 p/kWh
11:30 - 12:00 7.14 p/kWh
12:00 - 12:30 6.30 p/kWh
12:30 - 13:00 6.93 p/kWh
13:00 - 13:30 6.05 p/kWh
13:30 - 14:00 6.72 p/kWh
14:00 - 14:30 5.59 p/kWh
14:30 - 15:00 4.41 p/kWh
15:00 - 15:30 3.57 p/kWh
15:30 - 16:00 5.88 p/kWh
16:00 - 16:30 21.84 p/kWh
16:30 - 17:00 23.31 p/kWh
17:00 - 17:30 27.30 p/kWh
17:30 - 18:00 27.41 p/kWh
18:00 - 18:30 26.46 p/kWh
18:30 - 19:00 26.46 p/kWh
19:00 - 19:30 9.32 p/kWh
19:30 - 20:00 8.40 p/kWh
20:00 - 20:30 7.92 p/kWh
20:30 - 21:00 6.30 p/kWh
21:00 - 21:30 8.40 p/kWh
21:30 - 22:00 6.30 p/kWh
22:00 - 22:30 7.98 p/kWh
22:30 - 23:00 7.14 p/kWh
boffin:
--- Quote from: vad on October 26, 2019, 10:12:56 pm ---
--- Quote from: Simon on October 26, 2019, 08:44:46 pm ---litres per 100km alwoys confused me. I mean why?
--- End quote ---
I am more confused by MPG-e ratings of EVs that don’t have petrol tank.
--- End quote ---
Exactly why /100km makes more sense. Much easier to compare
7litres / 100km against 17kWh / 100km (Golf v eGolf for example).
You can more directly understand the difference.
Simon:
Yes but it's more difficult to calculate what is required of a certain journey which is why it is stupid. So i am going to drive 15m, how much fuel/electricity do I need? the first thing you will do either directly or indirectly is to reverse it to fuel/power per mile or km
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