Tesla Inc TSLA on Thursday showcased one of the largest battery installations in the US paid for by a tech giant apple inc AAPL.

What happened: Tesla posted a video of its 240 MWh Megapack at Cal Flats in Monterey County, California on Thursday on its official YouTube channel.

Cal Flats is a photovoltaic solar power plant that spans 2,900 acres and includes 280 MW of solar panels. The excess energy generated by Cal Flats is stored in the Megapack.

“Megapack provides reliable power when demand is high or the grid is down,” Tesla said in the video.

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In March 2021, apple inc AAPL said that is Construction of one of the largest battery projects in California Flats to support the solar farm that supplies all of its renewable energy in California. Apple later confirmed to the media that the setup would use Megapacks from Tesla.

The mega pack was first announced in 2019. Tesla describes the Megapack as a large-scale, rechargeable, stationary energy storage product with a lithium-ion battery.

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