Dying for a Chevy Volt, but....
On Feb 24, 8:04*pm, Ed Huntress wrote:
On Sun, 24 Feb 2013 14:51:51 -0500, "Existential Angst"
wrote:
"harry" wrote in message
....
On Feb 24, 10:52 am, "Existential Angst" wrote:
Awl --
After a recent thread on the Volt, I'm really tryna justify the purchase
of
one, but bleeve, it's hard.
I figger my gas cost per year is $1600 or so, and payments for a Volt
would
proly be $6,000 year.... PLUS electricity costs.
Now, about those electricity costs.....
If you calculate the $ per mile of gas, you get something like this:
At $4/gal, with 30 mi/gal, it costs 13c/mi in fuel.
Now, how much does it cost to charge a battery?
Don't for a minute believe what your ripoff utility tells you about c per
kWhr.... Do the math on your bill, divide the kWhr on the bill into what
you actually wrote on your check. Around NYC, that seems to be about
25c/kWhr -- which is outrageous.
So let's figger that Tesla's 85 kWhr battery takes, well, 85 kWhr to
charge
it..... that's about $20 in electricity.
If the Tesla gets 200 miles on that charge, that's 10c/mile.
If it only gets 100 miles, that's 20c/mile..... !!!!
Split the diff, that's 15c/mile.... MORE than what I'm paying per mile in
gas!!!!!!!!!!!!!!!!
WTF??
You get similar numbers for the Leaf, and Volt.
Now, it gets worse:
There's the ever-present thermodynamic kick-in-the-ass.
It will NEVER take only 85 kWhrs to charge an 85 kWhr battery -- it will
take proly 20% more.
So even if the Tesla DOES get 200 mi per charge (and jb's article suggests
that it does
nothttp://www.nytimes.com/2013/02/10/automobiles/stalled-on-the-ev-highw...
)
factor in the charging inefficiency, and you are just about EQUAL in $ per
mi cost of a 30 mpg vehicle.
Anything less than 200 mi per charge, and the Tesla loses, and poss. loses
badly.
So at NYC electric rates, an electric car, not counting ANY other factors,
is actually MORE expensive than gas, at $4/gal.
YET, you see these huge "equivalent" mpg numbers for electrics, typically
around 100 mpg, implying a $ per mile cost of less than 1/3 the cost of a
30
mpg vehicle..
But my calcs show that an electric will be *at least* as expensive as gas,
and likely considerably more than gas, as a fuel.... What gives??
Holy ****.... there goes my Volt....
Now factor in the high initial cost of electrics, inevitable battery
deterioration AND replacement cost, and wow, simply not viable. Unless I
made a mistake somewhere.
Now, some may bleat, Oh OH, MY electric rates are 5c/kWhr.... and I would
repeat, do the net division on your bill to see what it REALLY is. At a
TRUE 5c/kWhr, yeah, it makes sense, you could divide all the above
electric
costs by FIVE.
But I don't think anyone is really paying 5c, and quite a few places, like
CA, pay MORE than NYS utility rates.
AND, if your small car gets 40 mpg, that's even tougher competition for
electrics.
Idears?? Opinions?
--
EA
It is not an 85 Kwh battery it is around 12Kwh.
So everything you have written is completely wrong.
==============================================
Mebbe, but not for the reasons you are giving.
The 85 kWhr batt is Tesla'a largest battery, and the one the NYTimes article
was based on, in jb's thread.
The Leaf has a 24 kWhr battery, good for, sposedly, 60-130 mi, depending
depending depending.
The Volt has a 16 kWhr battery for it's 30-40 mi electric-only range --
already some disparity in the above batts.
Accelerations notwithstanding (subject to car mass), and factoring in CdA's,
the range of an electric car should be linearly proportional to the battery
size.
The fact that this appears not to be the case suggests people are plucking
numbers out of the air, or tests are not being properly standardized.
How YOU get 80 miles on a 16 kWhr batt would be an inneresting discussion.
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