haven't tested but feels very well built
Controller seems good and rugged and appears to function well with two 100w 18v panels linked either in series or parallel for charging a 12v lead acid battery. This though I can only confirm for the first couple of hours of use. Unfortunately I ordered the bluetooth sender NOT the display. The app is ok on android but for continually disconnecting from device and now won't reconnect. I still use controller but can no longer monitor or change settings. I have marked this down as have had to spend money ordering a permanent display which won't arrive for a while. Annoyed.