Our world craves constant power. As clean energy surges, taming its ebb and flow becomes paramount. Imagine capturing lightning in a bottle – that's the essence of Energy Storage Systems. They are not just batteries; they are time machines for electricity, holding today's surplus for tomorrow's needs. With renewables set to reshape our power landscape, understanding how these systems conquer the challenges of duration and capacity is vital. This journey explores the art of holding power, from fleeting moments to enduring reserves.