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I am not a battery expert by any means. But the article says:

> with 100 megawatts of capacity.

Isn't megawatts the measurement of power? Wouldn't Watt Hours be the measurement for capacity? Sometimes people use Apmere Hours also. Like the Chevy Bolt has 60 kWh of capacity.

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Turns out that power output is one of the most important measures for a battery.

On some applications it's even more relevant than capacity. (If you have an internal combustion car, take a look at its battery, odds are power is written in way larger letters than capacity.)

That's a great point and the answer is that it has storage capacity measured in Watt Hours and it has a peak power supply capacity measured in Watts. Other comments have the details :-)

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