PV COMBINER BOX 2 IN 2 OUT

Connecting to photovoltaic combiner box
Mount the combiner box and secure it with four screws, as shown below. Use 4–10 mm2, 600 V insulated cables. Strip 8 mm of cable insulation. Ground the combiner box by connecting it to the inverter. [pdf]
How big is the cable of the photovoltaic area combiner box
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][FAQS about How big is the cable of the photovoltaic area combiner box]

Huawei PV Inverter Installation Instructions
This document describes the SUN2000-115KTL-M2, SUN2000-110KTL-M2, and SUN2000-100KTL-M2 in terms of their installation, electrical connections, commissioning, maintenance, and troubleshooting. [pdf][FAQS about Huawei PV Inverter Installation Instructions]

Which PV inverter ratio should I choose
DC/AC ratio refers to the output capacity of a PV system compared to the processing capacity of an inverter. It’s logical to assume a 9 kWh PV system should be paired with a 9 kWh inverter (a 1:1 ratio, or 1 ratio). A PV to inverter power ratio of 1.15 to 1.25 is considered optimal, while 1.2 is taken as the industry standard. [pdf]