I think you're misunderstanding a bit. The factory will produce 35 GWh in cells per year and also receive 15 GWh in cells shipped in from other suppliers like

I think you're misunderstanding a bit. The factory will produce 35 GWh in cells per year and also receive 15 GWh in cells shipped in from other suppliers like Panasonic. Thus it'll produce finished packs totaling 50 GWh / year. In other words, total output of the factory is 50 GWh / year, 70% of which is vertically integrated.