Well made controller. Everything works as advertised. Good plug and play controller that is easy to set up. This MPPT controller is a game changer for my power needs in my mobile business as I used to use a cheap PVM model that only gave me about 60% of my 630w solar array. Now I have a great, stable and powerful charge all day long. The only downside is that there isn't really a battery percentage reader, making it a 4 star rating rather than the 5 stars it could have gotten.