[John Rogers]

I was worried about a frequency match up if the automatic switch unit had troubles. A "brown out" is dropping voltage and we used to get those all the time until SDG&E starting buying electricity from Mexico. In the area south of San Diego we don't get them because of Brown Field and all the border security facilities we have. A manual switch would work like the one James showed but in most areas a licensed electrician would have to get diagrams, install it, get it approved by the city and probably the power company since you're connected to them? That last stuff is why I use extension cords.