Hi guys i got this solar charge controller.
model SK20DU the only name on it
Rated current 20A
Rater voltage 12v/24v
max pv voltage 50v
max pv input power 260w 520w 24w

i want to connect 4x solarworld sw 50 poly rma panels to the controller to charge a Royal 1150k 12v battery to runn my national luna 110 letter fridge freezer

will this work or am i wasting my time with this controller
if it dose work can i add another battery