ErrorFindly
Error 22High Severity

Growatt MIN-6000TL-X Error 22 – Meaning & Fix

DC injection too high – excessive DC current detected on the AC output.

Expert Verified

Reviewed by a Certified Electrical Engineer & Licensed Technician

Official Meaning

The inverter has detected DC current leakage on the AC output side exceeding the regulatory limit, indicating a potential isolation or component fault.

Real-World Causes

  • 1Degraded output filter capacitors inside the inverter
  • 2Moisture ingress affecting the inverter's internal PCB
  • 3Grid voltage instability causing measurement errors
  • 4Faulty DC injection sensor giving false readings
  • 5Aging inverter components after years of operation

Symptoms

Look for these signs to confirm Error 22 on your Growatt MIN-6000TL-X:

  • Error 22 displayed with inverter shutdown
  • Intermittent operation – inverter starts then stops
  • Error appears more frequently during morning startup
  • Grid export stops but solar generation continues to battery
  • Event log shows multiple Error 22 occurrences per day

DIY Fix (Safe)

  1. 1Power cycle the inverter by turning off the DC isolator, AC breaker, and waiting 5 minutes before restarting
  2. 2Check that the inverter is properly sealed – inspect gaskets and cable glands for moisture entry points
  3. 3Verify the grid voltage is stable using a multimeter at the AC output terminals
  4. 4Monitor if the error occurs at specific times – morning dew can cause temporary isolation issues
  5. 5Check the inverter firmware version and update if a newer version is available via the ShinePhone app

Professional Action Required

  1. 1Replace the DC injection sensor module if diagnostics confirm false readings
  2. 2Test and replace output filter capacitors if capacitance has dropped below specification
  3. 3Perform a full insulation resistance test on the AC wiring between inverter and grid connection
  4. 4If the inverter is within warranty, contact Growatt for an RMA – Error 22 is a known component aging issue
  5. 5Install an external DC injection blocker as an interim measure if regulatory compliance is required

Contextual Information

Weather Conditions
Humid conditions and morning dew exacerbate this error
Grid Status
Grid-connected operation required – error relates to AC output quality
Battery / Load
Not directly related to battery load

Frequently Asked Questions

Is Error 22 dangerous?
DC injection into the AC grid can be a safety concern. The inverter shuts down as a protective measure. While not immediately dangerous, the underlying cause should be investigated promptly.
Is Error 22 covered under Growatt warranty?
If your inverter is within the standard 5-year warranty period (or 10-year extended), Error 22 caused by component degradation is typically covered. Contact your installer or Growatt support with the serial number.

Related Error Codes

F03—Growatt SPF-5000ES
High Severity
F01—Growatt SPF-5000ES
Medium Severity
F19—Growatt SPF-5000ES
Medium Severity

About the Author

Technical Review Team

Reviewed by certified electrical engineers and licensed appliance technicians with 10+ years of field experience. Our team verifies every error code explanation against manufacturer documentation and real-world repair data.