Those are the wrong units. A single cell's capacity is measured in Watt-Hours, which is a unit of stored energy. A factory making some number of cells per hour has its production measured in Watts, which is a unit of power.
The article makes this mistake several times, conflating energy and power in some places, but then correctly saying "150 GWh ... annual capacity" elsewhere.
PS: 150 GWh/annum is just 17 megawatts! This goes to show just how difficult batteries are to produce...
... no no no ... these aren't single use cells, instantaneous power isn't a meaningful unit (I mean energy/time is technically power, but one couldn't compare this to power as measured from a traditional power plant or anything like taht).
If one had to somehow contort the output into watts:
Recharged every week, 150GWh of car batteries would eat ~1GW of grid capacity. It is still a very long way from any meaningful fraction of grid energy (~4TW globally), but watts really aren't the right unit to measure production capacity.
The article makes this mistake several times, conflating energy and power in some places, but then correctly saying "150 GWh ... annual capacity" elsewhere.
PS: 150 GWh/annum is just 17 megawatts! This goes to show just how difficult batteries are to produce...