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Growatt · PV inverters · Growatt MOD TL3-X (three-phase grid inverter, 3–15 kW)

Error 303NE abnormal

Name in the manufacturer's documentation (user manual): NE abnormal[1]

In plain words (editorial)

The inverter detected an abnormal voltage between neutral and protective earth (N–PE). The manual says to check that the PE conductor has good contact.

When to call a service technician: Earthing and PE connections are checked by an electrician or the installer.

✎ 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] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 27 official manufacturer document quote verified Error 303 NE abnormal
  2. [2] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 27 official manufacturer document quote verified Check PE,to ensure that the PE line contact good
  3. [3] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 27 official manufacturer document quote verified If error message still exisits,contact Manufacturer