On 12/17/2013 07:46 AM, EVDL Administrator wrote:
On 17 Dec 2013 at 6:59, Willie2 wrote:
Looks like 1/2 of a Leaf battery (NEW!) is $2450 in Nevada.
Let's see, if you made a similar battery with LiFePO4 cells, what would it
take? They claim 182v and 60ah, so let's say 57 60ah cells. What's a
LiFePO4 cost these days, maybe 1.10 per amp hour? (Someone update me here,
I don't have current information.)
So 60 * 57 * 1.10 = $3762. That's 54% more ...
And the Nissan battery comes with a nice case, assuming you have a place in
your converson that you can fit it. But how long has it been sitting in
stock? And do you get a capacity warranty?
I wonder if the LiFePO4 battery would last 54% longer.
As I recall, the LiMn cells ThunderSky has sold were rated for 800
cycles. Their LiFe cells have been rated for 2000-4000 cycles. That
said, 800 cycles may well be enough for a car; I have less than 1000
cycles on my oldest TS LFP pack and it is still very close to it's rated
capacity. However, I had lost about 30% of the capacity on my Leaf
after less than 400 cycles. That is atypical, the Leaf's LiMn seems ill
suited to Texas heat.
An aside: My Tesla seems to have lost about 10% of it's capacity in 25k
miles. Maybe 200 cycles. I am not yet worried about it.
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