MISOL 110V Solar Water Heater Controller for Pressurized Solar Hot Water System - Perfect for Residential & Commercial Solar Heating Applications

I bought a house semi-recently that had this solar hot water system attached. When I bought the house I knew nothing about this solar system. Overtime, I was told it should be working and the pipes were hot but couldn't know if it actually was without paying hundreds of dollars for someone to come inspect and take a look at it. I looked at the old solar hot water controller that was attached and took the panel off only to discover that the fuses were blown inside. I needed a replacement for it since it was just constantly running and wasting electricity.This was what I was almost positive I needed after extensive research. It was just a Chinese knock off of a few other brands running for $150+. I needed a solar controller to check the differential between the temperature on the roof against the temperature in the tank, and to run the pump when the difference is exceeded. This did exactly that, but way updated.I ended up getting this, and it took a few weeks to come in from China, but finally arrived. You can see attached is what you get in the box. The solar controller, two temp probes, and the AC wire. Upon wiring up the new stuff, I discovered that my temp probe on the roof panels were incompatible. Basically what it comes down to, is that this SPECIFIC kind of temp probe responds in a different electrical voltage than the old style that was installed. Had to go up on the roof and replace the temp probe, I spliced it in with the old wire that was there and it worked all the way down in the basement perfectly.Once it was up and running, I read through the manual front to back to understand everything it had to offer. Something to note, is that you need to specify a password to get into the settings every-time which the default is I think 0000. This is not specified in the manual. I'd say the manual is about 95% accurate, it comes default set to celsius but be sure to change this in the settings. Other reviewers had noted that there was no way to change this or that, but you definitely can if you get past the password first and then access all the settings. I didn't change many if at all any settings, but since installing this solar controller for my hot water system it is working again, and working great! Now I can know what the temperature is on the roof and what it is in the tank and that it's operating correctly.