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

Growatt MOD: cleaning the inverter and the yearly DC disconnect check

Summary (editorial)

Clean only with the AC breaker and DC switch off and without cleaning agents. Check the DC disconnect and cables for visible damage; once a year the manual asks to turn the DC disconnect switch off and on.

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

From the manufacturer's documentation (English source wording, with page)

  1. If the inverter regularly reduces its output power due to high temperature, please improve the heat dissipation condition; maybe you need to clean the heat sink[1]
  2. If the inverter is dirty, turn off the AC breaker and DC switch, wait for the inverter to shut down, then clean the enclosure lid, the display and the LEDs using only a wet cloth[2]
  3. Do not use any cleaning agents (e.g. solvents or abrasives)[3]
  4. Check for externally visible damage and discoloration of the DC disconnect and the cables at regular intervals; if there is any visible damage, contact the installer[4]
  5. Once a year, turn the rotary switch of the DC disconnect from the ON position to the OFF position 5 times in succession – this cleans the contacts of the rotary switch[5]
  6. Prior to removal of any cover for maintenance or repair, turn off the switch on the AC and DC sides[6]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

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. 25 official manufacturer document quote verified if the inverter regularly reduces its output power due to high temperature, please
  2. [2] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified if the inverter is dirty, turn-off the ac breaker and dc switch ,waiting the inverter shut down
  3. [3] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified do not use any cleaning agents (e.g. solvents or abrasives).
  4. [4] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified check for externally visible damage and discoloration of the dc disconnect and the cables
  5. [5] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified once a year, turn the rotary switch of the dc disconnect from the on position to the
  6. [6] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified prior to removal of any cover for maintenance or repair, turn off the