Since you are, AFAIK, the first to report this, would you give some more of your car's back story?
What are your charging/driving habits?
Do you charge to 100% and keep it there, or discharge to below LBW often?
What is the ambient temp where your car is driven or parked?
What sort of temp bar levels on the dash, do you see during the Summer?
I believe that if you "accept" and monitor your CW kWh use on long trips, you will get accurate reports of available battery capacity, that would certainly show a reduction, if in the order of10%.
With one year and 8,500 miles on my LEAF, I am pretty sure my available capacity has not dropped more than a few percent, if any.
In the last few weeks, we've lost one of the 'available' bars (see picture
). We've put 17,000 miles on it in 14 months. I immediately called the dealer, and he said it's normal, we'd lose one bar and then won't lose any more, and he's seen it in cars with only 6 months of use. He's had Nissan Engineers evaluate it and it's 'normal'. Battery test from 3/28/2012 was normal, 12 status bars, 5 stars.
At 100% charge, we only get about 3-5 miles now off of the 12th bar. I think I've had 10% drop in range in the last handful of months but I have no evidence to support that. Sometimes my old leadfoot ways return when I least expect it, so I don't want to shout much about overall range, but I "feel" like it's dropped significantly, and the loss of a bar supports that.
Has anyone else seen this? This does not seem like the 'gradual' loss advertised. http://flic.kr/p/bVbwYG