Broadly, storage solutions fall into four major categories: electrochemical, mechanical, thermal, and hydrogen (chemical). This article explains how each works, typical applications, advantages and limitations, performance characteristics, and how to choose the right type for. . Energy storage systems are transforming the way we produce, manage, and consume electricity. From large-scale grid storage to commercial, industrial, and residential solutions, each type serves a unique role in balancing supply and demand, enhancing reliability, and integrating renewable energy. . Energy storage technologies allow energy to be stored and released during sunny and windy seasons. Although it may appear to be a simple concept, energy storage can be accomplished in a variety of ways. Electricity was largely generated by burning fossil fuels in the grid of the twentieth century. . Battery Storage Dominance with Rapid Cost Decline: Lithium-ion batteries have become the dominant energy storage technology, with costs falling over 85% since 2010 to $115/kWh in 2024.