Tesla Motors, an electric car maker backed by the U.S. Department of Energy (DOE), posted a $49.8 million loss in the first quarter of 2014. This loss compared to a profit of $11.2 million in the same period a year earlier despite selling more cars.(i) Last year’s profit was not due to electric car sales, but to sales of California zero-emission-vehicle environmental credits to other auto manufacturers. Those lucrative credits have declined and tight battery supply has made it harder to produce the carmaker’s electric vehicles.