Ann: New York Gigafactory Progress, page-136

You sound confused @Trommel,

Looking to commence production mid 2019 so full year before line actually produces to capacity.

https://hotcopper.com.au/posts/33703369/single
"first production for a 1GWh line is planned for mid-2019 from iM3NY’s Endicott, NY facility on the Huron Campus."

So 1Gwh of cell prod. by mid 2020 seems the obvious conclusion to draw.

Though forward looking statements such as this probably best case scenario given new premises and plant to bed in. May just turn out to be "a true and accurate representation of events and expectations at the time they were published"