Ancillary services in the Swedish power grid are crucial for ensuring a reliable, stable, and sustainable electricity supply, especially in a time when the energy landscape is rapidly changing with increased integration of renewable energy. Svenska kraftnät, which is responsible for procuring ancillary services, does this so that devices such as batteries can support the power grid when there is an imbalance between electricity production and consumption. If you want to understand more about how the balancing market works, you can watch this video from Svenska kraftnät: https://www.youtube.com/watch?v=W2OzGaltu3Y