I have a 31W, I added 4-100 watt panels and it will charge my 3 - 31 series 12 volt batteries. I also added a light timer to turn off the fridge for 3 hours, then on for 30 minutes during the night. Does your fridge make a “clunking noise when it starts up when only on battery power?
Carlmatt@aol.com. Write to me, lets talk more about this problem.