The features of this system are a battery charger with MTTP function which controls charging of the batteries, and automated dimming protocol. The charger measures each cell of the battery bank, and thus ensures that the battery cells are charged equally. If the batteries are not fully charged during the day, the system will calculate and set the dimming level so that the luminaire can maintain the light output for the whole night. In addition, you can set 5 dimming steps via your Bluetooth smart device and a specially made application. The application can also be used for the system monitoring, where you can see SOC of the batteries, charging current, load current, temperature inside the battery bank, and brightness status.