I already have a 100/30 MPPT controller. I am planning on connecting 3 Zamp solar panels @170W ea to a combiner box in parallel. Total Pmax would be 510W. Vmp of panels is 18v. Max power current for each panel is 9.4. The panels will be mounted flat on my RV roof. I know the documentation says a max of 450W for this controller, but I have read articles about oversizing your array for your controller is OK as any excess power will be clipped and those articles have also said that a larger array will harvest more power earlier in, and later in the day, as well as on cloudy days, or if there is partial shading due to trees. Will a potential of 60W above the charge controller documented max cause harm to the controller on those days when there is full unobstructed sun.
