1000V DC Combiner Box 1 In 1 Out Isolator Type: Complete Guide

What Is a 1000V DC Combiner Box 1 In 1 Out Isolator Type?

A 1000V DC combiner box with 1 input and 1 output (1 in 1 out) is a specialized enclosure used in photovoltaic systems to combine a single solar string into a single output circuit. The "isolator type" means it includes a DC-rated isolator switch that allows safe disconnection of the solar array from the inverter or charge controller. Soutya's model is designed for 1000V DC systems, offering a compact footprint and robust construction. It includes DC fuses, surge protective devices (SPDs), and the isolator switch, all housed in an IP65-rated enclosure for outdoor use.

Why Use a 1-In-1-Out Isolator Type Combiner Box in Solar Systems?

For small-scale PV installations—such as residential rooftops or micro-inverters—a 1-in-1-out combiner box simplifies wiring and reduces component count. The isolator switch provides a manual means to disconnect the DC power for maintenance or emergency shutdown, complying with electrical safety codes. Soutya's 1000V DC combiner box ensures that each string can be isolated without interrupting other strings, improving system safety and serviceability., the integrated SPD protects the inverter from lightning-induced surges, which is critical for system longevity.

How to Select the Right 1000V DC Combiner Box for Your Project?

Selection depends on system voltage, current rating, number of inputs, and protection requirements. For a single-string system, a 1-in-1-out isolator type is cost-effective. Key parameters include: maximum DC voltage (1000V), maximum input current (e.g., 32A), and IP rating. Soutya's combiner box offers a compact design with pre-configured fuses and SPDs, making it easy to specify. Compare with multi-input combiner boxes if you have more strings, but for simplicity, this model reduces installation labor and cabinet space.

What Technical Parameters Matter for the Soutya 1000V DC Combiner Box?

The Soutya 1000V DC Combiner Box 1 In 1 Out Isolator type includes the following specifications:

These parameters ensure compatibility with mainstream solar panels and inverters. The IP65 enclosure provides dust and water ingress protection, ideal for outdoor installation.

Which Industry Standards Apply to DC Combiner Boxes?

DC combiner boxes must comply with international standards for safety and performance. Soutya's 1000V DC combiner box is designed in accordance with:

• IEC 62548:2016 – Photovoltaic (PV) arrays – Design requirements, covering wiring, overcurrent protection, and isolation.
• IEC 61643-11:2011 – Low-voltage surge protective devices – Part 11: SPDs connected to low-voltage power systems, ensuring surge protection performance.
• IEC 60947-3 – Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, and switch-disconnectors, for the isolator switch.

These standards ensure the combiner box meets global requirements for electrical safety and reliability.

References

[1] IEC 62548:2016. Photovoltaic (PV) arrays – Design requirements [S]. 2016.
[2] IEC 61643-11:2011. Low-voltage surge protective devices – Part 11: SPDs connected to low-voltage power systems [S]. 2011.
[3] IEC 60947-3:2020. Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units [S]. 2020.