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Willmall photovoltaic DC isolator switches give solar installers a visible disconnection point for DC strings and inverters, built for DC breaking duty.
It disconnects the direct-current circuit of a solar array, providing a visible isolation point for maintenance between the array and inverter.
DC current does not pass through zero, so the switch must be designed to extinguish the DC arc when it opens.
It is installed in the DC path, often at the array or inverter side, and may be mounted on the PV structure or a wall.
The switch is rated for the DC system voltage and the string or array current it must carry and isolate.
A visible open state confirms the circuit is isolated before maintenance, which is central to safe work on the DC side.
