DC Isolator Box IP65 Enclosure Two Strings

The 1000V DC Isolator Box IP65 Enclosure Two Strings, supplied by China manufacturer Zhejiang Soutya New Energy LLC, is a 1000 V DC photovoltaic isolation unit built with a UV-resistant polycarbonate housing and IP66-rated sealing for durable outdoor performance. The box contains two cage-type rotary DC isolator switches that provide visible-break isolation and maintenance safety, while integrated positive, negative and PE busbars ensure reliable grounding continuity. Designed for dual-string PV arrays, it delivers essential manual isolation and equipotential bonding without additional over-current or surge components.

SYDSC-32 Cage-type DC Isolator Switch Technical Parameter

Application scenarios

1. Dual-String Residential and Commercial Rooftop PV Systems

This isolator box is ideally suited for small-to-medium-scale rooftop installations with two independent PV strings. Its compact design and IP65 rating make it perfect for space-constrained outdoor mounting on walls or racks. It provides a dedicated, safe, and visible disconnection point for each string, allowing for maintenance or troubleshooting on one string without shutting down the entire array, thus minimizing energy loss.

2. Maintenance and Safety Isolation for Small Solar Plants

In small ground-mounted solar farms or carport installations, this unit serves as a critical safety device for technicians. The dual, 4-pole isolators (2-pole per string) ensure both positive and negative conductors of each string are simultaneously isolated, creating a guaranteed safe working environment before any work on the combiner box, inverter, or downstream components begins.

3. Testing and Commissioning of PV Strings

During the installation and commissioning phase of any PV system with two strings, this box is invaluable. Installers can easily and safely isolate each string to measure open-circuit voltage (Voc), short-circuit current (Isc), and perform insulation resistance tests individually, ensuring each string is performing correctly and safely before being connected to the inverter.

4. Backup Power and Off-Grid Solar Systems with Dual Sources

This box is perfect for systems that integrate two different DC sources, such as two separate PV arrays or one PV array and a DC generator, into a single off-grid inverter or charge controller. It allows for the safe and independent isolation of each power source for maintenance or to manage power input based on availability.

5. Educational and Demonstration Solar Setups

For vocational schools, training centers, or public exhibits featuring live solar technology, this isolator box provides a clear and practical demonstration of safe DC isolation procedures. The visible switching action and robust enclosure make it an excellent tool for teaching the importance of safety in PV system design and maintenance.