The Longmax Dual-fuse PV Combiner Box is compliant withNEC 2017/2020 and is used to combine per string up to a 35Afuse-link(1500V-specific PV fuse,both positive and negativeterminal),output circuit breaker rating 400A or 500A.In a photovoltaic power generation system, a device thatcombines several PV string parallel for one output.Usedbetween PV modules and inverter.NEMA 4X enclosure ratings, meeting the outdoor installationand usage requirements.Installation and maintenance simple,convenient, it has a long service life.