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Deye · PV inverters · Deye SUN-SG04LP3-EU (three-phase hybrid inverter, 5–12 kW)

F20Tz_Dc_OverCurr_Fault

Name in the manufacturer's documentation (fault list): Tz_Dc_OverCurr_Fault[1]

In plain words (editorial)

DC overcurrent – the manual lists a PV module or battery connection problem, or starting up in off-grid mode with a big load. It says to check the PV and battery connections, reduce the load, and switch DC and AC off and on after one minute.

When to call a service technician: If the fault stays, contact 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] Deye Three Phase Hybrid Inverter SUN-5-12KWSG04LP3 Fault List , p. 3 manufacturer document – copy from a distributor quote verified F20 Tz_Dc_OverCurr_Fault
  2. [2] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified Check PV module connect and battery connect;
  3. [3] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified When in the off-grid mode, the inverter startup with big
  4. [4] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified Check PV module connect and battery connect;
  5. [5] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified power load, it may report F20. Please reduce the load power
  6. [6] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified Turn off the DC switch and AC switch and then wait one minute,
  7. [7] Hybrid Inverter User Manual – SUN-5K/6K/8K/10K/12K-SG04LP3-EU (ed. 2024-08) (V3.3.0 (instructions_sun-5-12k-sg04lp3-eu_240813_en)) , p. 47 official manufacturer document quote verified Seek help from us, if can not go back to normal state.