Every once in a while this topic comes up. Everyone says how important it is to have these and I beleive them. This is my question though. When power gets tripped by storms, or work by the electric co, or just a fluke thing, would I be correct in saying that once these get tripped they did not come back on? If so then what happens when you are gone all day at work or better yet on vacation and the power goes out. Seems like your tank would die? So how does everyone use these?