The GoodWe SBP G2 Series is an AC-coupled retrofit solution, which is able to upgrade an existing single-phase or three-phase on-grid PV system into an energy storage system by adding a battery. The inverter is compatible with low-voltage batteries ranging from 40 to 60V and allows surplus electricity to be stored in the battery for later use. The integrated plug-and-play solution, compact design, and minimal weight simplify its installation, operation, and maintenance. Importantly, the inverter can automatically realize UPS-level switching to the back-up mode in less than 10ms, ensuring a stable and reliable power supply. An all-round intelligent system for optimized power usage and maximized return on investment.