I just bought and installed a WELLSEE WS-C2460-60A charge controller. I have 480 watts, (40A) of panels. The unit is easy to install but that is as far as the good goes on this product.
Superficially the box is nice and compact, small heat sink, might be a problem in the summer, but the membrane buttons are cheap and clunky, I do not think they will last. The having a integrated display and not just a couple of light is nice.
Now the bad news. IT DOES NOT WORK. Set the set point to charge to, I am not using the load feature so don't care about that feature, but did put a small load 0.25A anyway. The battery charges up nice, that is when the PWM kicks on (not really a PWM unit only comes on at near top of charge.) Battery reaches set point and unit shuts off charging, and that is end of story. Unit locks up, usually in off mode, display stops toggling the Volt, Amp, Load, and just says WELLSEE. Some times it locks up and the current stays on and overcharges the batteries.
I proceeded to jack around with settings and stuff to no avail. Have to restart several times a day until I buy a new controller. WELLSEE no help, and for a $100 item, who is going to ship back to China for $40 postage. I did discover in reading the specs the input voltage is 17V for a 12 V system. My panels put out 23V Open circuit. I loaded up the panels to a dump load to reduce output to 17V and the unit seems to work that way but that requires me dumping about 25% of my panel power to a dead load before the controller. This is not the MPPT unit but I wouldn't buy one of them either after this mess. I ate this piece of trash and ordered a Trace unit (should have in the first place $200 like my wife told me to do)
I sure am glad the green thing is a hobby for me, wont save any money at this rate.