Electric car maker Tesla has notched up its biggest ever quarterly loss and said it "learned many lessons" from its crucial Model 3 production plans.
The firm's future hangs on the Model 3 sedan, but it has so far struggled with production bottlenecks.
Tesla reported a loss of $675.4m (£487m) in three months to 31 December, compared with $121.3m a year earlier.
But it said revenues rose to $3.29bn, up from $2.28bn, and that it was addressing Model 3 production issues.
"At some point in 2018, we expect to begin generating positive quarterly operating income on a sustained basis," Tesla, which is yet to make a profit, said on Wednesday.
Despite ongoing production bottlenecks, the electric car maker said it would continue to target Model 3 production rates of 2,500 by the end of the first quarter this year, and 5,000 by the end of the second quarter.
