Shenzhen Sinexcel Isuna Energy Technology Isuna D6K-TL-AU

This warranty covers defects for 5 years. It excludes issues from improper installation or modification. To claim, contact support.

AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.

Coverage shape

Full-replacement coverage

If you sell the home

Transfers to the next homeowner

What voids it

Warranty voided due to non-accredited installation, improper modification, or tampering.

Environment limits

High-temperature operation above 40°C may void warranty.

Showing 10 of 10. The official install manual is the authoritative source — always confirm before acting.

• Insulation faultcriticalCall your installer

  Manual (PDF)

  Faulty insulation detected.

  Likely cause

  Check PV string insulation resistance to ground for issues.

  What to do

  Identify and resolve the cause of the insulation fault; check cables for damage.

• Reverse connection of L and NcriticalCall your installer

  Manual (PDF)

  Phase sequence of L and N lines from the grid is incorrect.

  Likely cause

  Improper wiring in the electrical setup.

  What to do

  Check and correct the phase sequence immediately.

• The inverter is overheated.critical

  Manual (PDF)

  Inverter has reached an unsafe operating temperature.

  Likely cause

  Check installation location, ensure it’s away from direct sunlight.

  What to do

  Allow the inverter to cool down before restarting it.

• Battery 1/2 overvoltagewarning

  Manual (PDF)

  Battery voltage exceeds acceptable limits.

  Likely cause

  Check if the battery specifications match and connections are correct.

  What to do

  Verify battery voltage and connections, and discharge if necessary.

• Battery 1/2 undervoltagewarning

  Manual (PDF)

  Battery voltage is too low.

  Likely cause

  Charge the battery if it is not meeting voltage requirements.

  What to do

  Always monitor battery voltage and charge as necessary.

• Grid voltage anomalywarningCall your installer

  Manual (PDF)

  Abnormal grid voltage detected.

  Likely cause

  Occasional alarms due to temporary grid issues.

  What to do

  Monitor grid quality. Persistent issues should be checked with an electrician.

• Heat sink is too highwarning

  Manual (PDF)

  Inverter heat sink temperature is too high.

  Likely cause

  Inverter is installed in direct sunlight or poor ventilation.

  What to do

  Ensure proper ventilation and relocate if necessary.

• PV1/2/3 not connectedwarning

  Manual (PDF)

  PV string disconnected or DC breaker open.

  Likely cause

  Check PV cable connections and ensure the inverter's PV DC breaker is closed.

  What to do

  Inspect connections and close the DC breaker if needed.

• PV1/2/3 overvoltagewarning

  Manual (PDF)

  PV string voltage exceeds inverter's maximum input voltage.

  Likely cause

  Reduce the number of series-connected PV modules to lower the string voltage within the allowable range.

  What to do

  Check PV module connections to reduce voltage. The system will auto-recover after correction.

• Battery 1/2 is not connectedinfo

  Manual (PDF)

  Battery not properly connected.

  Likely cause

  Check if the battery specifications match, connections are correct, and voltage is normal.

  What to do

  Inspect battery connections to ensure they are secure.