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SolarEdge · PV inverters · SolarEdge SE3K–SE10K (three-phase inverter with power optimizers, SetApp)

Error 2x1DLine to Neutral voltage is above threshold.

Name in the manufacturer's documentation (fault list): Line to Neutral voltage is above threshold.[1]

In plain words (editorial)

The line-to-neutral voltage is above the threshold. The manual says to check the grid, ground and L1/L2/neutral connections and whether the load between L1 and L2 is symmetric.

When to call a service technician: Contact your installer or electrician; if needed, the local grid authority.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified 2x1D Line to Neutral voltage is above
  2. [2] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified Check the grid connection
  3. [3] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified Check the GND connection
  4. [4] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified Check the L1, L2 and Neutral connections
  5. [5] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified Verify symmetric load between L1, and L2
  6. [6] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 13 official manufacturer document quote verified Consult the local grid authority