This robust combiner box features easy installation, high durability, and compatibility with multiple DC inputs, making it a top choice for enhancing solar power efficiency and safety. . PV array combiners for joining sub arrays. . A solar combiner box is a crucial component in solar energy systems, designed to consolidate the outputs of multiple solar panel strings into a single output that connects to an inverter. Price and other details may vary based on product size and colour. 12 which describes the Photovoltaic power system requirement for DC/AC/ Dual power sources in an excellent detail.