I've seen some discussion in various threads about the (un)desirability of including "estimated gas savings" in the Order (my.teslamotors.com/models/design) page but what I haven't seen discussed is the actual number.
Two questions:
1. Why are they talking about 5 years when the warranties are 4 and 8 years?
2. Shouldn't the "savings" vary by model/configuration due to the efficiency differences?
If you use the P85D as the baseline, then the value for 70D should arguably be...
$10,000 * 3.42 / 2.98 = $11,476
That's a 15% additional savings. No?
Edit:
Actually the equation is a bit more complicated...
P85D
2.98 mi/kWh
335.97 Wh/mi
$10,000 savings
$10,000 / (4/5) = $12,500 gasoline cost (equivalent)
$10,000 / (1/5) = $2,500 electricity cost
70D
3.42 mi/kWh
259.26 Wh/mi
$2,500 * (259.26 / 335.97) = $1,929 electricity cost
$12,500 - $1,929 = $10,571 savings
So 5.7% additional savings.
Still pretty significant, IMO.
- $10,000
Estimated gas savings over 5 years
Gasoline Savings
Electric vehicles are less expensive to fuel than gas powered vehicles. The average person drives between
10,000 and 15,000 miles and spends between $2,000 and $3,000 on gasoline per year. In comparison, the cost
of electricity to power Model S over the same distance is five times lower. Over the five year length of
car ownership, that's between $8,000 and $12,000 in gasoline savings.
Two questions:
1. Why are they talking about 5 years when the warranties are 4 and 8 years?
2. Shouldn't the "savings" vary by model/configuration due to the efficiency differences?
EPA rate | EPA range | Battery capacity | Configuration |
3.42 mi/kWh | 240 mi | 70 kWh | 70D |
3.12 mi/kWh | 265 mi | 85 kWh | 85 |
3.18 mi/kWh | 270 mi | 85 kWh | 85D |
2.98 mi/kWh | 253 mi | 85 kWh | P85D |
If you use the P85D as the baseline, then the value for 70D should arguably be...
$10,000 * 3.42 / 2.98 = $11,476
That's a 15% additional savings. No?
Edit:
Actually the equation is a bit more complicated...
Let's assume they really meant "one fifth of the cost" because "5 times lower" is at best confusing language.In comparison, the cost of electricity to power Model S over the same distance is five times lower
P85D
2.98 mi/kWh
335.97 Wh/mi
$10,000 savings
$10,000 / (4/5) = $12,500 gasoline cost (equivalent)
$10,000 / (1/5) = $2,500 electricity cost
70D
3.42 mi/kWh
259.26 Wh/mi
$2,500 * (259.26 / 335.97) = $1,929 electricity cost
$12,500 - $1,929 = $10,571 savings
So 5.7% additional savings.
Still pretty significant, IMO.
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