Electric car fast charging feud between SAE and CHADEMO, who will win?
At this weeks EVS26 electric vehicle conference, the impending choice between DC fast charging standards was the major topic. CHADEMO is the incumbent standard, developed several years ago by Tokyo Electric Power Company (TEPCO) and a consortium of Japanese automakers, and has been in use since 2008. The SAE is developing a new iteration of the J1772 standard which includes a new "combo" connector supporting not only AC charging, but also DC Fast Charge. A consortium of automakers promise to begin delivering electric cars containing the combo J1772 system in 2013. Unfortunately the two consortiums do not overlap, and instead we have a Hatfield-McCoy's style feud going on. Maybe Beta-versus-VHS is the better analogy? (for the record, I owned a Beta VCR, but of course both were beat by DVD)
The CHADEMO group is led by Nissan, maker of the Leaf, and Mitsubishi, maker of the i-MiEV. Both cars require either a long recharge time (as much as 7 hours) at a 3.3 kilowatt charge rate via a J1772 plug, or a fast recharge time, 30 minutes, using the CHADEMO port. Research has shown that when the CHADEMO network was built in Japan, that electric car utilization went up dramatically, suggesting that the existence of a fast charging network alleviates range anxiety.