For very large existing loads, a single cable might not be useful or offered in massive ample size. In these situations, You should utilize parallel cables—two or even more cables of precisely the same gauge carrying equal present. That’s why wire sizing is especially vital in DC systems — https://pvcable6mmh1z2z2-kfactory84059.bloggazza.com/38201185/solar-cable-technical-datasheets-pdf-downloads-for-xlpe-xlpo-wires