The Gigafactory may have experienced production constraints in recent months, potentially hinting at trouble for the Model 3.
Tesla's head of battery technology has left the company after more than a decade on the job.
Kurt Kelty joined Tesla in 2006 after the startup signed a contract with Lotus that paved the way for the Roadster. He had previously served at Panasonic for 14 years and led Tesla's negotiations with the Japanese battery maker to partner in the Gigafactory project, according to Bloomberg.
"We can confirm that Kurt Kelty has left the company to explore new opportunities and we want to thank him for everything he's done for Tesla," the company said in a statement.
The departure represents a deeper executive shakeup as the automaker enters a particularly critical growth phase, ramping up production by a factor of 10 to clear a backlog of around a half million Model 3 deposits.
The Model 3 is believed to be powered by a new '2170' lithium-ion cell, claimed to be cheaper and with higher energy density than the slightly smaller '18650' cells that can be found in the Model S and everything from flashlights to laptop computers.
Separate reports suggest the Gigafactory may have experienced production constraints in recent months, potentially hinting at trouble for the Model 3, however it is unclear if such issues are related to Kelty's departure.