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UTL 12V/24V 50A SMU (Solar Management Unit) converts your normal/existing inverter into a solar inverter. It is capable of charging a battery that has gone into deep discharge condition.UTL's Solar Management Unit (SMU) is extremely reliable device and has a long operational life. This SMU has over charging voltage, over charging current, under voltage, battery reverse polarity protection, solar reverse polarity protection, reverse current flow (from battery to solar array), and over temperature protection.Useful Tips:Read the manual or instructions before installing the SMU.Installation and wiring must be done carefully by a qualified person.Avoid touching the connections while the SMU is in operational mode.Do not install the SMU on flammable construction materials.To avoid short-circuits and overheating, ensure that the wires are tightly connected.