PV DC Isolator Switches for Solar Array Isolation | 16A-63A | 600V-1500V DC | TUV

Residential Rooftop PV Array Isolator

A typical residential PV installation uses a UKGD and UKPD series DC isolator mounted on the roof adjacent to the array, providing the array-level DC isolation required by regulations such as BS 7671 Section 712. Electricians can isolate the array at roof level before disconnecting DC cables at the inverter, eliminating the risk of DC arc flashes from live cables being disconnected under load. The IP66 enclosure withstands roof-level exposure to rain, snow, and direct sunlight over the 25-year lifespan of the PV system. Additionally, the lockable OFF position allows electricians to apply a personal padlock before working on inverter DC connections.

Commercial Rooftop Sub-Array Isolator

Commercial rooftop PV systems utilize UKGD and UKPD series isolators at each sub-array, enabling specific roof sections to be de-energized for maintenance while remaining areas continue power generation. The pre-wired MC4 connector version enables rapid installation across large roof areas by allowing crews to simply plug isolators into string cables and mount them to the roof structure. The enclosure design allows O&M technicians to easily manage isolation protocols before performing module cleaning or replacement work.

Utility-Scale Solar Farm Array Disconnect

Utility-scale solar farms use UKGD and UKPD series isolators at the output of array combiner boxes to provide the final DC isolation point before feeder cables run to inverter stations. In these large-scale installations, the DC isolator serves as a lockout point during inverter maintenance, allowing teams to secure the DC supply before working on power modules. The non-polarized design is critical here, ensuring the isolator can interrupt current in either direction with equal reliability when reverse currents flow from adjacent healthy strings.

Battery Storage System DC Isolation

Residential and commercial battery storage systems use UKGD and UKPD series isolators as the DC disconnect between battery racks and hybrid inverters. The isolator provides essential means for maintenance or emergency disconnection as required by battery installation standards like IEC 62485-2. Installed adjacent to the battery rack with clear labeling, the lockable OFF position prevents accidental reconnection during module replacements, while the non-polarized design reliably handles both bidirectional charge and discharge currents.

Carport and Floating PV Array Isolation

Specialist PV installations—including carports, floating solar, and agrivoltaics—rely on UKGD and UKPD series isolators within IP66 enclosures to withstand harsh environmental challenges. Carport applications utilize impact-resistant polycarbonate enclosures, floating installations benefit from robust IP66 sealing against high humidity and saline atmospheres, and agrivoltaic setups are protected against agricultural dust and fertilizers. This robust enclosure engineering ensures reliable outdoor isolation across all specialized PV scenarios.

Specify DC Isolation for Your PV System

• Application Sizing: Our solar applications team reviews your PV array specifications and recommends the correct UKGD and UKPD series model.
• MC4 Pre-Wired Option: Reduce site labor and DC termination risk with factory pre-wired and tested MC4 isolators.
• OEM/Project Supply: Source UKGD and UKPD series isolators in bulk for your PV installation projects with project-specific documentation.