What wires are used for photovoltaic combiner boxes

Use 4–10 mm2, 600 V insulated cables. Strip 8 mm of cable insulation. Ground the combiner box by connecting it to the inverter. Use the grounding points marked with the Open the combiner box cover. [pdf]

Outdoor installation requirements for outdoor energy storage cabinets

NFPA 855 only permits residential ESS to be installed in the following areas:Attached garagesDetached GaragesOn exterior walls at least 3 ft (914 mm) away from doors or windowsOutdoors at least 3 ft (914 mm) away from doors or windowsUtility closetsStorage or utility spaces [pdf]
[FAQS about Outdoor installation requirements for outdoor energy storage cabinets]