Tesla Motors Inc. shares soared in extended trading after the electric car maker delivered a strong fourth-quarter performance and said that it expects sales of its vehicles to increase sharply this year.
The Palo Alto, Calif., company said Wednesday that it expects to deliver more than 35,000 of its Model S sedans in 2014, up 55 percent from last year.
That compares with a forecast from an industry analyst at Barclays that the company would produce 29,800 in 2014.
Tesla investors focus heavily on the car maker's forecasts as demand has outstripped its supply in the past. The company said battery cell supply will continue to constrain its production but expects that should improve in the second half of the year.
It had previously said that its sales in the October-December period were the highest in its history, with almost 6,900 Model S delivered. That was well ahead of the just over 5,500 it sold in the July-September period.
The Model S, which starts at $70,000 and can go up to 300 miles on a battery charge, is Tesla's only vehicle on the market right now.
To meet the rising demand, the company plans improvements at its lone factory, a former Toyota-General Motors plant in Fremont, Calif.
CEO Elon Musk told analysts on a conference call Wednesday that Tesla is building a new final assembly line that will allow it to increase production to more than 1,000 cars per week from the current pace of 600 a week.
The new line will be in place by around the end of September. Tesla also is building a separate body-construction line to make the plant more efficient and ramp up for the Model X, a new electric SUV that it will start producing later this year.
"We'll be able to ramp our production rate quite a bit with a very small increase in hiring," Musk said. "Our labor efficiency essentially is likely to improve a lot over the course of this year."
During the fourth quarter, Tesla posted a loss of $16.3 million, or 13 cents per share, far smaller than a loss of $89.9 million, or 79 cents per share, in the prior year.
Tesla, which argues that these figures do not reflect its true performance because accounting rules limit how it records revenue for leases, earned 33 cents per share on an adjusted basis. That far surpassed analyst expectations of 23 cents per share, according to FactSet.
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