4–Pole DC Isolator Switch Introduction
YRO DC Isolator Switch is designed for safe electrical isolation in solar PV systems, providing reliable disconnection between PV modules, inverters, and DC circuits during installation, maintenance, and emergency situations.
With high protection performance, UV-resistant enclosure, and compliance with international standards, YRO DC disconnect switches are suitable for residential, commercial, and industrial solar applications.
As a professional DC isolator switch manufacturer, YRO supports OEM customization, stable production capacity, and certification-based quality control for global distributors, installers, and solar system integrators.
Why Choose a No Wired 1500V DC Isolator Switch?
1. Flexible Configuration for Solar Equipment Manufacturing
Different solar equipment manufacturers may have different internal layouts. A pre-wired isolator can limit installation options, while a no wired design allows engineers to customize connection methods according to their own product structures.
This makes the switch suitable for:
- Solar inverter cabinets
- Customized electrical enclosures
- OEM solar equipment
2. Designed for High Voltage PV Systems
Modern photovoltaic systems increasingly adopt higher DC voltages to improve transmission efficiency and reduce cable usage.
The 1500V DC rating makes this isolator suitable for commercial and industrial solar applications requiring higher voltage isolation capability.
How to Select a 4-Pole DC Isolator Switch?
When selecting a high-voltage DC isolator, buyers should consider:
- Maximum PV system voltage
- Rated current
- Number of poles
- Installation space
- Wiring requirements
- Certification standards
A 4-pole design is commonly selected when multiple DC circuits require coordinated isolation.
FAQ
Q1: What is your lead time? Can you provide samples for testing?
Our standard lead time is 7 days, depending on the order quantity, product configuration, and customization requirements.
Yes, sample orders are available. Customers can evaluate the product’s installation, compatibility, and performance before placing a bulk order. Our technical team can also provide product selection guidance and installation support to help ensure the switch meets your project requirements.
Please contact our sales team for sample availability, pricing, and technical assistance.
Q2: What is the difference between YRO no-wired and pre-wired DC isolator switches?
YRO offers both no-wired and pre-wired DC isolator switches to meet different installation methods and project requirements.
A no-wired DC disconnect switch is supplied without PV connectors (MC4) or pre-installed output cables. During installation, the installer selects the appropriate cable, crimps the MC4 connectors, and completes the wiring on site.
This version offers several advantages:
- Greater installation flexibility– Installers can choose the cable length and cable size based on the actual project layout.
- Ideal for OEM and replacement applications– It is well suited for customized solar equipment, spare parts inventory, and maintenance projects where cable specifications may vary.
A pre-wired DC isolator switch is supplied with factory-installed cables and connectors, reducing on-site wiring work and helping installers complete installation more quickly while maintaining consistent wiring quality.
For standard residential or commercial PV installations, where installation efficiency and consistency are priorities, the pre-wired version is generally the recommended choice.
For projects requiring specific cable specifications, customized wiring, or replacement installations, the no-wired version provides greater flexibility.
YRO can also provide custom cable lengths, connector configurations, and OEM solutions based on customer requirements. Please contact our sales team for customization options.
Q3: Why does my DC isolator switch still show current when it’s turned off?
Normally, when a 1500V disconnect switch is turned off, it disconnects the main DC circuit and stops the operating current.
If your meter still shows a small current or voltage, it doesn’t always mean the isolator switch is faulty. This can happen because the inverter may still contain stored energy, long PV cables can create a small induced signal, or connected equipment may have a small leakage current.
If the system still carries a significant operating current or continues to power connected equipment after the isolator is turned off, inspect the wiring, connected devices, and the isolator switch to ensure everything is functioning correctly.
Q4: Can YRO provide customized branding?
Yes.
OEM logo, packaging, and product customization are available for distributors and equipment manufacturers.
