Bosch System Controller – MY25. Bosch Battery System Controller. Reduced to the essentials the System Controller is the control unit for Ebikes with the smart system. The scope of functions and information is deliberately limited so you have a quick overview that wont distract you when riding. The System Controller is seamlessly integrated into the top tube this gives the already robust companion additional protection is hardly noticeable and is perfect for sporty tours and design-oriented eBike fans.