This is a multifunctional off-grid solar inverter, integrated with an MPPT solar charge controller, a high-frequency pure sine wave inverter, and a UPS function module in one machine, which is perfect for off-grid backup power and self-consumption applications. This inverter can work with or without batteries. The whole system also needs other devices to achieve complete running such as PV modules, generators, or utility grids. Please consult with your system integrator for other possible system architectures depending on your requirements. The WiFi / GPRS module is a plug-and-play monitoring device to be installed on the inverter. With this device, users can monitor the status of the PV system from the mobile phone or the website anytime anywhere.