ETL certificate For North American Market without transformer Rated Output Power,3KW,4KW,5KW General DescriptionsSG3KTLU / 4KTLU / 5KTLU is a transformerless inverter with higher efficiency. Its aluminum housing makes it very compact, robust and light in weight. The direct plug-in terminal port provides easy, safe and reliable cable connection under any circumstances. It can be used for string- ...