Batteries with a capacity of 15–29.9 kWh are ideal energy storage solutions for medium and larger solar systems. These models are already capable of covering the energy needs of entire households, small businesses or offices, especially if the goal is to achieve partial or complete energy independence. The 15–29.9 kWh range can cover a significant portion of daily energy consumption, making it an excellent choice for hybrid systems and as a backup energy source.

The batteries in this category are based on lithium iron phosphate (LiFePO₄) cell technology, which offers a high cycle count, safe operation and a long service life. All models have a built-in BMS (Battery Management System) unit that monitors the condition of the cells and optimizes the charging processes. The energy storage devices with a capacity of 15–29.9 kWh are mostly modularly expandable, so they can be flexibly adapted to increasing energy demand in the future.