Decarbonizing electricity grids requires multiple actions beyond installing renewable energy sources. Deploying battery storage systems; applying advanced analytics for smart grid operations; having agility in outage planning; using DC voltage systems; storing clean hydrogen; implementing dynamic energy pricing and other measures all contribute to managing modern low-carbon grids. What are the practical learnings to upgrade grids for a lower-carbon energy future? Which technologies have the most potential to drive low-carbon grids? What regulatory or institutional challenges have yet to be overcome?