S6-EA1P(3.6-6)K-L series is a new generation of AC coupled products, designed to provide photovoltaic energy storage upgrading solutions for the built grid-tied system, so that it has energy storage and emergency power supply capabilities. Products compatible with lead-acid batteries and lithium-ion batteries, and suitable for any brand photovoltaic system energy storage upgrading，which making system safety, reliability, efficiency, and strong compatibility.