The 1-Battery-Concept ensures the longest battery life by charging and monitoring each 12 V battery separately. Matching batteries is not necessary. The output is decoupled from the input, separating load circuits into buffered and non-buffered sections. It allows forVRLA battery sizes between 12 Ah and 200 Ah, with a "Battery Size" selector for different battery sizes. There is an additional 50% extra output power available for up to 5 seconds. The battery management system is superior, providing comprehensive diagnostic and monitoring functions. It includes a "Replace Battery" signal and a "Battery-Low Prewarning" signal. There is also a selectable buffer time limiter and temperature controlled battery charging.