New open box never used! Everything in photos is included. Power Source Solar Powered. Model Name Y&H 1200W Solar Grid Tie Micro Inverter. Included Components MC4 Connectors. WVC series inverter Using IP65 waterproof streamline design which effectively prevent rainwater on the surface erosion. Microinverters turn the power from your solar panels into usable electricity. Single-phase microinverters are usually used in residential and small commercial environments (Support single-phase or three-phase connection). We have improved the AC wiring solution. Configure converters for faster installation. Avoid the risk of miswiring the fire, zero and ground wires. Meanwhile, the DC input is designed with MC4 connector to avoid reversing the positive and negative terminals. (Some customers extend the solar panel cable so that the positive and negative polarity is reversed). Grid Tie Inverter can monitor in real time the power generated by the inverter through the AC digital meter. (Voltage, current, active power, electrical energy, frequency, power factor) No fire risk and electric shock during installation and operation due to low DC voltage(up to 50V) compared with at least 200V from string inverters. Grid Tie Solar Inverter suitable for 4X250W-300W 36V solar panel (Vmp30-39V; Voc36-50V) Vmp = working voltage; Voc = open circuit voltage. Optimized for high powered 60-cell and 72-cell modules. Each MC4 branch cannot exceed 300W. Stackable Connection;High precision phase detection;Over and under voltage protection; Over and under frequency protection; Islanding protection. Almost no maintenance work is required, clean the dust on the photovoltaic panel occasionally.