Last week's major storm in my area forced me to run on 1000 watts of generator power for nearly 8 hours. In that time I ran my sump pump, box fan, 15 amp ham radio power supply, ham radio, and radio charger for my police radio. The gennie could have run much more, but that was all I needed at the time. I noticed that the power of course is very dirty. The box fan was making a whine noise that it never makes off household power. The power supply and radio charger didn't seem affected. The sump pump worked fine but the day after the storm the float switch (electronic) failed forcing me to get a new one. Not sure if that was due to dirty power or due to the major flooding my sump pit and basement had. Anyway, what can be used to "clean up" gennie power? I know true or pure sine invertors are used to convert 12v battery power to "clean" 110v power, but what takes dirty 110v and makes it "clean" 110v?