This panel can be used for remote querying and control of Phoenix inverters equipped with UTP sockets. It can also be used with MultiPlus inverters/chargers if an automatic transfer switch is needed, without the battery charger function. The brightness of the LEDs automatically decreases in the dark. It can only be used with the following types: 12/1200, 12/1600, 12/2000, 12/3000, 12/5000, 24/1200, 24/1600, 24/2000, 24/3000, 24/5000, 48/3000, and 48/5000.