Sungrow Error Code 11

Sungrow Inverter Error Code 11

Is your Sungrow Solar Inverter showing up with Error Code 11 on the screen? When a problem occurs, the “Error” state will be shown on the main screen.

Error Code 11 on your Sungrow Solar Inverter means that the direct current (DC) mixing into the alternating current (AC) is too high. This isn’t good because your home and the power grid use AC, and the inverter’s job is to convert the solar panels’ DC into usable AC. If too much DC gets into the AC, it can cause problems with electrical devices and the inverter itself.

To fix this, try these steps:

1. Turn Off the Inverter: Find the main power switch for your inverter and turn it off. This might be on the inverter or your home’s electrical panel.
2. Check Connections: Ensure all connections between the solar panels, inverter, and your home’s electrical system are tight and not damaged. Loose or damaged wires can cause this issue.
3. Restart the Inverter: After checking connections, turn the inverter back on. Sometimes, just restarting can clear the error.
4. Inspect the Solar Panels: Look for any visible damage or dirt on the panels that might affect their performance. Clean the panels if they’re dirty.
5. Call for Help: If the error doesn’t go away, it might be time to call a professional. There could be an internal problem with the inverter or something complex with your solar panel setup.

Always be careful when dealing with electrical systems, and if you’re unsure, it’s best to contact a professional.

Troubleshooting to try

• Check if your inverter is switched on
• Check if your DC isolator is turned on
• Check if all the light indicators are green
• Try rebooting the whole system

How to restart/reset/reboot your solar inverter?

Follow the inverter shut down procedure label which may be located on your inverter or the main switchboard of your house.

Typically, this procedure will be:

1. Turn off the AC “Solar Supply Main Switch” or “Inverter Main Switch” located on the main switchboard of the house.
2. Turn off the AC isolator at the inverter (if present)
3. Turn off the “PV array DC isolator”, located next to the inverter. The screen should go blank, and the lights should go off.  Leave it like this for five minutes or so, and then switch it back on.
4. Wait a few minutes…
5. Turn the inverter back in reverse order (DC isolator first, AC second).
6. DC On first. It is very important that you restart by switching the DC isolator on first, as you shouldn’t switch DC under load (ie with the AC on), as the isolator could arc.
7. AC On next. Put the AC switch (solar supply main switch) back on, and then wait.  All inverters take at least one minute to restart, and you may see the lights flashing while the inverter does internal testing.  There will also be a variety of messages on the screen again as it tests.  This is quite normal.

Sungrow Maintenance

Regular maintenance ensures a long operating life and optimal efficiency of the entire PV plant. Risk of inverter damage or personal injury due to incorrect service! Always keep in mind that the inverter is powered by dual sources: PV strings and utility grid.

Before any service work, observe the following procedure:

• Disconnect the AC circuit breaker and then set the DC load-break switch if the inverter to OFF;
• Wait at least 10 minutes for inner capacitors to discharge completely;
• Verify that there is no voltage or current before pulling any connector.

Maintenance Items include:

• System Clean (Once six to twelve months) – Check the temperature and dust of the inverter. Clean the inverter enclosure if necessary. Check if the air inlet and outlet are normal. Clean the air inlet and outlet, if necessary.