
I had to buy this because my FM80 died. I've been trying to service it for 3 months with no success. I bought it because it's the same size, fits my panel easily, and is easy to set up since the wiring is the same for it and the FM80. I never used the FM80 as I never added any more panels. The device works fine, but since the customer service is so bad I can only hope nothing happens to him.