This is for shorter term fluctuations, but: https://www.pv-magazine.com/2022/07/27/tesla-big-battery-begins-providing-inertia-grid-services-at-scale-in-world-fi

This is for shorter term fluctuations, but: https://www.pv-magazine.com/2022/07/27/tesla-big-battery-begins-providing-inertia-grid-services-at-scale-in-world-first-in-australia/ https://www.pv-magazine.com/2022/07/27/tesla-big-battery-beg...