DC Isolator Box IP65 Enclosure Three Strings with Fuse

The DC Isolator Box IP65 Enclosure Three Strings with Fuse, supplied by China manufacturer Zhejiang Soutya New Energy LLC, is a 1000 V DC photovoltaic isolation-and-protection unit built into a UV-stabilised polycarbonate housing with IP65-rated sealing for permanent outdoor duty. Inside the enclosure three cage-type rotary DC isolator switches give positive visible-break isolation for safe maintenance, while six integral 15 A cylindrical fuses (two per string) provide precise string-level over-current protection. Factory-wired positive, negative and PE busbars maintain uninterrupted grounding continuity across the triple-string array. Designed for PV sub-arrays up to 3 × 15 A, the box delivers manual isolation, equipotential bonding and individual string fusing in one compact assembly.

Technical Parameter

Application scenarios

1. Commercial flat-roof arrays ≥ 20 kW where string-level fusing and visible-break isolation are mandated before the MPPT aggregator.  

2. Agricultural greenhouse installations that require IP65-sealed boxes to survive constant humidity, irrigation mist and 24 h UV exposure while protecting every string.  

3. Medium-scale ground-mounted plants (up to 30 kW blocks) that need local maintenance disconnection and individual string over-current protection inside a single enclosure.  

4. Car-port or canopy PV canopies where three-string sub-arrays feed central inverters and rapid-shutdown rules call for a lockable, weather-proof isolator/fuse combination within arm’s reach.  

5. Retrofit projects on aging rooftops that add new strings; the box provides compliant fusing for the added capacity and a safe isolation point without rewiring the existing DC combiner.