In the maritime industry, there's a growing need for sustainability, lower emissions, and energy independence. However, limited grid capacity at shipyards, ports, and moorings poses operational challenges. Battery storage in shipping offers a strategic solution: it enhances energy security, enables emission-free sailing, and creates room for growth. A shipboard battery can store energy and deploy it during peak moments, such as when propulsion or onboard systems are activated. With a battery for an electric ship or a hybrid ship, peak consumption is smoothed out, and the ship's energy storage is recharged during quiet periods or through shore power. This reduces the strain on infrastructure, especially at mooring facilities or charging infrastructure at ports. Battery storage is also beneficial during the construction or retrofitting of a ship. Whether it's a battery for inland shipping, tugboats, ferries, patrol boats, or inspection vessels—each vessel with electric or hybrid propulsion benefits from its own battery with maritime EMS for smart control and energy balance. For shipyards and shipping companies, battery storage is also a way to make both shore power facilities and fleet management more sustainable. On-site, for instance, at a port authority, a battery storage shore power installation can serve as a grid buffer to handle temporary peaks or provide power to ships without overloading the grid. Thus, energy storage at port authorities becomes a building block for reliable, clean port infrastructure. Battery for emission-free sailing is no longer a future vision. By deploying a flexible and scalable battery solution, not only is a more stable onboard energy supply achieved, but it also opens doors to new revenue models, lower operational costs, and an edge in regulations and tenders.