This document discusses battery energy storage systems (BESS) for energy communities. It provides an overview of Hitachi Chemical, a major battery manufacturer, and their various battery technologies including long life lead-acid batteries, lithium-ion batteries, and lithium-ion capacitors. It also presents examples of energy storage systems used in smart city projects and factory energy management systems in Japan. The conclusion emphasizes that energy storage technologies must be selected based on the requirements and goals of each specific energy community project. Hitachi Chemical offers various technologies and can help determine the appropriate solutions.