This inverter has worked great for me since I bought it until I tried to turn on the light with the toaster. Apparently the inverter is too slow to set up because as soon as the toaster turns off the heating elements the bulb burns out (overvoltage). The inverter did not respond quickly enough to the load drop (from 1500W to 20W), resulting in a voltage spike high enough to light a lightbulb. Probably a UPS class inverter is needed for such a fast response. Given these limitations, this is a good and reliable inverter.