Trace C-12 solar charge controller. This controller works perfectly for low-end systems. Includes the owner's manual and temperature sensor. I used this for many years with an 80 watt panel.
The main thing to be careful of with this controller is that it works for lead-acid only. It will not work for Lithium batteries! The bulk and float settings are adjustable, but not enough to accommodate a lithium battery. LEAD-ACID ONLY! It will work for all of flooded, AGM and gel-cell batteries.