Our complete batteries are professionally manufactured in Bavaria (Freising near Munich) from a high-quality and stable metal housing and are fully assembled for use. They contain all the essential components that are necessary for smooth and safe operation. In addition, other internal devices are carefully installed that make using the battery easier, such as an interface board for easy data connection to an inverter, a 4.3 inch touch color screen with a clear display and a parallel module for connecting several batteries to one system.