... sine wave inverter offers high efficiency. 2.Automatic switch ... timeTypical8msEfficiencyAC to AC>95%DC to AC>80%IndicatorAC ... . It depends on which model.For example for relay type ... situation, we have explored series of power supply products ... voltage stabilizers, voltage regulators, inverters, voltage regulator ,silicon rectifying chargers, low voltage apparatus, reactors, current transformers, voltage ...