I found this controller easy to install. It works well and is easy to read the screen even in full sunlight. When I first hooked it up to the battery it did not work. I realized quickly enough that I had hooked up the batteries in reverse polarity. This controller will not work in reverse polarity. I switched the cables around between the batteries and everything has been working fine ever since.
Scott E. Mayer
user manual should update
Unit works very well instructions are almost useless found several videos online covering set up and programming.