Tags ac-block1 ancillary-services1 black-start1 fire-safety1 germany1 GFI1 GFM1 grid-following2 grid-forming2 hithium1 IBR1 market-signals1 podcast1 product-release1 reflections1 sungrow1 synthetic-inertia2 system-design1 thermal-runaway1 ul9540a1