For most solar refrigerator or solar freezer, ALWAYS use a 15 amp 12/ 24 volt charge controller (or perhaps a 20 amp is some cases, but please verify this with us first) . Recommended brands include Victron Blue Solar and Morningstar. Please contact EcoSolarCool if you want to use any other brands for advice.
In most installs, always follow the cable guide instructions during installation. See image below.