Having a surge protector is better than nothing. From experience having a loss of TV, stereo, microwave etc. do to storm and loss of electricity cost $$$. All were fried. If you are spending $$$ it is best to have it protected as I do now. I don't worry when there is power outages. I can't answer your question for I am not expert in the field. As I have found most stores are not stocked or inventory updated but you can be sure even spending a little more to have the item quickly with great customer service!