The Renogy 5 Strings Solar Combiner Box is the ideal solution to combine inputs from up to 5 strings of solar panels into a single output. It accepts up to five 1P miniature circuit breakers and one 2P surge protection device for improved safety of the solar system. The built-in standard DIN rail enables easy installation of the protection devices. Equipped with a rain cap and rubber seals, the grey steel enclosure is designed to survive in outdoor environments. The knockouts are reserved for waterproof strain reliefs or conduits.