Mur Good info and response, To try to answer your question, i do beleive there is another relay that would activate the island protection. i would assume that is the clicking you here when they are turning off/on. How are we to be assured it will always work. Simply put we are not. These are the chances we take with NON UL approval inverters as well as why they are cheap to pruchase. These are also the reasons as a business i could never install one for a customer. Unless we ourselves install the saftey features as Tom is speaking of or the shut down conatctor system i have in place we will always be taking a chance with these inverters. Knowing thes facts it does leave a newbie in the cold. We all know that as of now to get the manufacture to revise the design will be out of the question. I have no answers on what to do but only to say you take the chance and follow other information as it come in. We are trying to use them in a way to not create any dammage to them and it looks like so far we have been sucess full after many tries. I do not know of any other people using these invertes this extensivly as well as sharing this much infomation on them so i guess we are on our own.