The 2 types of inverters are Modified Sine Wave and Pure Sine Wave. Modified Sine Wave Inverters work fine with the majority of electrical appliances but may cause interference with some appliance/equipment, when running a more sensitive electrical appliances/equipment, pure sine wave will be suitable because of its efficiency in converting clean electricity. If you have doubt about certain appliance/equipment, we would recommend contacting the manufacturer to check if the item is compatible with a Modified Sine Wave or a Pure Sine Wave inverter.