The authors of the new study concluded that the battery packs used by market-leading EV manufacturers like Tesla and Nissan cost as little as $300 per kilowatt-hour of energy in 2014. That’s lower than the most optimistic published projections for 2015, and even below the average published projection for 2020. The authors found that batteries appear on track to reach $230 per kilowatt-hour[/QUOTE]
This is very interesting and echoes what Elon has been saying all along.
The Remarkable Plunge in the Cost of Electric Vehicles | MIT Technology Review