Phases 1/3 = 1 AC-coupled single-phase battery inverter, multistring for up to 3 Li-ion high-voltage batteries, Pac,r/Sac, max. 3.68 kW/ 3.68 kVA, transformerless, SMA Smart Connected, easy installation and monitoring via integrated web server with Smart Inverter Screen and installation assistant, integrated RS-485 communication interface, maximum flexibility for new and existing systems through AC coupling, Ethernet, SMA Modbus and SunSpec protocol, integrated emergency power function, fully automatic backup function (optional)