DC String Inverter Shut Down and Restart Procedure

In this video, we take you to the Hoxton Park Technical Training Centre to show you how to safely shut down and restart a DC String Inverter used with solar panels. Whether you're a solar technician or a homeowner with a solar power system, knowing how to perform these procedures is essential for both routine maintenance and emergency situations.

In this comprehensive guide, we explore a 2kW SunGrow String Inverter, which features dual MPPT inputs, making it a versatile and efficient choice for capturing solar energy. Our in-depth tutorial covers the shutdown and restart processes, ensuring the safety of both the equipment and those working on it.

📌 Here's a breakdown of the key steps covered in this video:

⚡ Shutdown Procedure:

Turn off the Main Switch Inverter Supply AC Isolator: Locate this switch either inside the switchboard or adjacent to the inverter. Follow the labeled procedure carefully to isolate the AC side of the inverter.

Turn off the PV Array DC Isolator: Most String Inverters are equipped with a PV Array DC Isolator. Ensure it's turned off before working on the inverter. If it's not integrated, you'll find it next to the String Inverter. Always listen for the click to verify that it's off.

Safety First: Before working on the inverter, it's crucial to test and confirm that the inverter is de-energized. Your safety should be the top priority.

🔁 Restart Procedure:

Turn on the PV Array DC Isolator.

Turn on the Inverter AC Isolator.

Turn on the Inverter Main Switch.

⏳ After completing the restart procedure, allow the inverter some time (usually around 60 seconds) to synchronize the DC and AC before it starts generating power.

Remember, these steps are crucial for the proper maintenance and safety of your solar power system. If you're a technician or a solar enthusiast, understanding these procedures is essential. Don't forget to like, comment, and subscribe for more informative videos on solar technology and maintenance.

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