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SOFAR (Shenzhen SOFARSOLAR) · SOFAR 3.3–12KTLX-G3 (three-phase grid inverter) · Procedure

How to switch a Sofar KTLX-G3 inverter off and on safely

Summary (editorial)

The manual gives the order for switching AC and DC off and on and the waiting time before any work.

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

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

  1. Shutdown step 1: turn OFF the AC circuit breaker[1]
  2. Shutdown step 2: turn OFF the DC switch[2]
  3. Start step 1: turn ON the DC switch[3]
  4. Start step 2: turn ON the AC circuit breaker[4]
  5. Screen showing normal indicates correct operation[5]
  6. Alarm red light ON = recoverable or unrecoverable fault; GFI red = GFCI fault[6]
  7. After turning off AC breaker and DC switch wait at least 5 minutes before maintenance[7]
  8. Internal faults: turn OFF DC switch, wait 5 minutes, turn ON; if not rectified contact technical support[8]

⚠ 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] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 52 official manufacturer document quote verified Step 1: Turn OFF the AC circuit breaker.
  2. [2] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 52 official manufacturer document quote verified Step 2: Turn OFF the DC switch.
  3. [3] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 51 official manufacturer document quote verified Step 1: Turn ON the DC switch.
  4. [4] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 51 official manufacturer document quote verified Step 2: Turn ON the AC circuit breaker.
  5. [5] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 51 official manufacturer document quote verified Screen showing “normal”
  6. [6] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 54 official manufacturer document quote verified “Alarm” Red light ON= recoverable or unrecoverable faulty
  7. [7] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 10 official manufacturer document quote verified wait for at least 5 minutes before carry any maintenance or repair work
  8. [8] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified There are internal faults of inverter, turn OFF the