Electric car maker Tesla Inc. calmed jittery investors Wednesday, assuring them it can meet aggressive production targets for its new lower-cost Model 3 sedan. CEO Elon Musk said investors should have "zero concern" about whether Tesla will be able to make 10,000 Model 3s per week by next year. Tesla just delivered the first 30 Model 3s to employees last week.

"This is maybe the best I've ever felt about Tesla, to be frank," Musk said on a conference call with analysts and media. Musk worried investors last week when he warned that Tesla was about to embark on "at least six months of manufacturing hell" as it tried to get Model 3 production to 5,000 cars per week by December. On Wednesday, Musk said there's always a risk of machines breaking down or suppliers not coming through, but he doesn't expect significant changes to that plan.

"We know this. We signed up for it. I'm not blaming hell because we bought the ticket," he said. Tesla burned through $1 billion in the second quarter preparing for the Model 3's arrival. It opened 29 new stores and service centers, and it's also planning to double the number of fast-charging Supercharger outlets this year to 10,000 worldwide. Tesla ended the quarter with $3 billion in cash.