Our complete batteries are professionally manufactured in Bavaria (Freising near Munich) from a high-quality, sturdy metal housing and fully assembled for use. They contain all the essential components necessary for smooth and safe operation. In addition, additional internal devices are carefully integrated to facilitate battery use, such as an interface board for easy data connection to an inverter, a 4.3-inch color touchscreen with a clear display, and a parallel module for connecting multiple batteries to a single system.