Rapid Shutdown Devices | Solar Panel & String Level Safety

Firefighter Safety Switch Factory

Our Firefighter Safety Switch Factory is dedicated to manufacturing high-quality switches designed to ensure enhanced safety for emergency response teams.
With advanced features and robust construction, our switches provide reliable disconnection of power sources during firefighting operations.
Trust our expertise in firefighter safety and choose our switches to enhance the protection of lives and property. Contact us today to
discover our range of firefighter safety switches and prioritize safety in critical situations.

SKS/SISOH will automatically switch to the OFF position. Since the SKS/SISOH is located close to the PV modules, the high voltage DC current from the
PV modules will be completely isolated, which leaves a safe situation for the firefighters when fighting a fire in the commercial or residential building.

PV Array Level Rapid Shutdown Switch

Firefighter Safety Switch

PV Array Level Firefighter Safety Switch 1-2 strings

PV Array Level Firefighter Safety Switch 3-4 strings

PV Array Level Firefighter Safety Switch 5-10 strings

DC Fuse Test Center

Features and Benefits
Over-temperature protection (85°C)
IP66 aluminium enclosure
One, two, three or four string models available
Emergency shutdown button for rapid disconnect
Includes: AC connector, wall fixings and MC4 connectors
If a firefighter disconnects the AC power to the home, the switch will open the circuit and disconnect the DC power coming from the panels off the roof.

Applications and Markets

As soon as a firefighter shuts down the main AC circuit, the SKS/SISOH will detect this. If this power down situation lasts longer than 5 seconds, the SKS/SISOH will automatically switch to the OFF position. Since the SKS/SISOH is located close to the PV modules, the high voltage DC current from the PV modules will be completely isolated, which leaves a safe situation for the firefighters when fighting a fire in the commercial or residential building.

Frequently Asked Questions

How quickly can the voltage drop to a safe range after shutdown?

Within 30 seconds.

How to select String Level RSD?

Fristly select the number of RSD strings according to the number of PV strings, and then select the detailed parameter specifications according to the string voltage and current.

How RSD realize shutdown?

Overtemperature protection, Emergency stop button shutdown, AC side power loss shutdown.

How many types of RSDs Suntree have? how to distinguish them?

1-2 strings, 3-4 strings, 5-10 strings, each type has a different shell size.

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