The GoodWe GW3648D-ES is a bi-directional energy storage inverter with a nominal output of 3.6 kW, designed for both on-grid and off-grid PV systems. It features a maximum DC input power of 4600W and an MPPT input voltage range of 125-550V. The inverter operates with a 48V nominal battery voltage and includes an integrated 3-phase smart meter. With an IP65 protection rating, it's suitable for outdoor installation. The unit measures 516 x 440 x 184 mm and weighs 28 kg. It offers various communication options including CAN, RS485, and WiFi, and can be controlled via an LED interface and app. This versatile inverter efficiently manages energy flow between solar panels, batteries, household loads, and the grid, optimising solar energy usage and storage capabilities.