Inverter 150W 12v dc to 220v ac

This inverter has board that belongs to high frequency square AC output and also it is not suitable for the inductive appliance such as motor ,fan and coil transformer. While picked up with low-load machines (LED light, mobile phone charger and DVD set-top box), you are suggested to pick up with low voltage point, such as: 172V/110V.It should be install a large heat sink to release its long time high-load  (¡Y100W) work.It should not connect the power inversely. Besides, power supply and power wire should have large enough current. Do not overload and short-circuit because it without any protections.The number in measured by the output high frequency non-load voltage meter will be a little higher.