Recieved the item just now, Fast shipping. Feels heavy. The wires is a bit too short for my needs, so my plan was to desolder the wires and replace them with longer ones, But sadly the unit is potted in ressin, It is not service able, and thats a big problem if the unit would fail. I have not tested them yet. Goin to use these in 4x12v in series = 48v my plan is to have 3 strings of 48v for my solar setup. I have to order one more for my battery setup. but if i can find the same type that are not potted, i'd buy those. Looking forward to test these out.