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Posts tagged “battery”

By Russ Finley on Apr 13, 2015 with 105 responses

Nissan Leaf Drive Train is 25 Times More Reliable than Conventional Cars

[Updated 5/4/2015 to delete potentially incorrect information about storage space and battery size.]


My Leaf parked in front of a seventies vintage Ford Pinto (my first car was a Pinto). Car technology has come a long way.

Nissan recently released the results of a five year study that found 99.99 percent of its battery packs are still operating as warrantied (battery not having less than 80 percent capacity after five years). Using that information, a study conducted by Warranty Direct (an independent British insurance specialist) found that the Leaf drive train is 0.255/0.01 =25 times more reliable than internal combustion engines. This is, however, somewhat misleading because today’s conventional cars are amazingly reliable, especially compared to a 1973 Pinto. They found that out of 50,000 conventional cars aged 3-6 years old, only a quarter of one percent “had an issue that led to an immobilization of the internal combustion engine.” This finding appears to have led Glass’s (Britain’s used car guide) to conclude:

“They [Leafs] are good enough that, as an expert in this field, we will be looking again at our residual value forecasts for LEAF and probably revising them upwards. Long-term battery life has been a definite concern for used EV buyers but the new figures from Nissan effectively remove this worry.

“Really, Nissan has gone through a process with the LEAF similar to Toyota with the first generation Prius several years ago, where the cars had to be proven in real life conditions before used buyers could feel confident. Now, the Prius enjoys excellent residuals and the LEAF should start to find a similar level of market acceptance.”


By Samuel R. Avro on Aug 17, 2010 with 8 responses

Obama: Clean Energy Policy Will Lead to 800,000 Jobs in 2 Years

Obama harshly criticized his political opponents for attempting to block the administration’s clean energy policies in Congress.