Commercial storage systems are the trend: their power and capacity rates are developing rapidly and are therefore an interesting solution for industrial and commercial enterprises. High-performance commercial storage units are used for self-consumption optimisation, peak shaving, e-mobility (time of use), pre-charge storage and for their emergency power function. Several manufacturers focus on a high life expectancy of the devices, high cycle numbers and high efficiency rates. The safety concept of the storage units is particularly important. We offer the appropriate version for each purpose and provide support when planning and projecting the commercial storage system.