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DC fast charging not as damaging to EV batteries as expected

As convenient as DC fast charging is, there have been lots of warnings that repeated dumping of so many electrons into an electric vehicle's battery pack in such a short time would reduce the battery's life. While everyone agrees that DC fast charging does have some effect on battery life, it may not be as bad as previously expected. Over on SimanaitisSays, Dennis Simanaitis, writes about a recent presentation by Matt Shirk of the Idaho National Laboratory (INL) called DC Fast, Wireless, And Conductive Charging Evaluation Projects (PDF) that describes an ongoing test of four 2012 Nissan Leaf EVs that are being charged in two pairs of two. One pair only recharges from 50-kW DC fast chargers, which the other two sip from 3.3-kW Level 2 chargers exclusively. Otherwise, the cars are operated pretty much the same: climate is automatically set to 72 degrees, are driven on public roads around Phoenix, AZ and have the same set of dedicated drivers is rotated through the four cars. "Degradation depends more on the miles traveled than on the nature of recharging." What's most interesting are the charts on page seven of Shirk's presentation (click the image above to enlarge), which show the energy capacity of each of the four vehicles. When they were new, the four batteries were each tested to measure their energy capacity and given a 0 capacity loss baseline. They were then tested at 10,000, 20,000, 30,000 and 40,000 miles, and at each point, the DC-only EVs had roughly the same amount of battery loss as the Level 2 test subjects. The DC cars did lose a bit more at each test, but only around a 25-percent overall loss after 40k, compared to 23 percent for the Level 2 cars. Simanaitis' takeaway is that, "INL data suggest that the amount of degradation depends more on the miles traveled than on the nature of recharging." The tests are part of the INLs' Advanced Vehicle Testing Activity work and a final report is forthcoming. These initial numbers from IPL do mesh with other research into DC fast charging, though. Mitsubishi said daily fast charging wouldn't really hurt the battery in the i-MiEV and MIT tests of a Fisker Karma battery showed just 10-percent loss over 1,500 rapid charge-discharge cycles.

Indie rockers Local Natives perform from back of Nissan Rogue

Most bands go through a fairly simple trajectory of vehicles to make it to shows. When they form, it's all about just getting to the gig and anything works. As they build a following and start touring a little regionally, they upgrade to a van to fit all of the members and equipment. Finally, if they taste big time success, they move to the tour bus. However, indie band Local Natives is taking an interesting detour from that path in a new promotion from Nissan called Off the Stage for the Rogue.
The members show up to the middle of nowhere in a pair of the CUVs, and in a few minutes the vehicles are set up to be the group's sound system and its stage. This promo also acts as a video for the song Breakers, which is a bit of a slow jam, but the scenery is absolutely beautiful. Scroll down to watch the Local Natives turn the Rogue into a place to perform practically anywhere.

Nissan Leaf resale value expected to take a hit

Nissan Leaf resale values may take a tumble, according to Kelley Blue Book. The vehicle evaluation resource said the 2013 Nissan Leaf will retain around 35 percent of its MSRP after three years; that's down five percent from what KBB gave the 2012 Leaf at the end of 2011. Automotive News reports KBB adjusted the EV's residual value prediction because the used transaction prices for the 2011 model have stuck around 35 percent for the past few months due to relatively cheap gasoline, not to mention the fact that Nissan trimmed the electric's MSRP from $36,050 to $29,650 before the $7,500 tax credit.
Since used buyers are often motivated by more practical buying concerns than early adopters or those wanting to curb their carbon emissions, they may not be willing to pay more for an EV. Meanwhile, early Leaf models are now coming to auction, abandoned by rental car companies after customers shunned them in favor of traditional internal-combustion vehicles. Many of those at auction have less than 10,000 miles and carry an average transaction price of just $13,700.