SUN-5-12K-SG01HP3-EU-DM2 three-phase hybrid (F-series table)
Deye F50 error code
DC component in the V-phase grid current is too high.
Likely causes
- DC injection from the inverter output stage
- Faulty AC current sensor
- Grid transformer saturation
- Output-stage hardware fault
Checks to run, in order
- 1Check the grid current waveform with a power analyser
- 2Check the AC wiring and neutral connection
- 3Restart and restore factory settings
Fixes
- Restart three times and restore factory settings
- Re-torque the AC terminals and check the neutral
When to escalate
If F50 returns, the output stage or current sensor needs distributor service.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Deye F50 mean?
DC component in the V-phase grid current is too high.
How do I fix Deye F50?
Restart three times and restore factory settings Re-torque the AC terminals and check the neutral
When should I escalate Deye F50?
If F50 returns, the output stage or current sensor needs distributor service.
Can I reset Deye F50 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F50 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F50?
Deye F50 is documented for SUN-5-12K-SG01HP3-EU-DM2 three-phase hybrid (F-series table). Confirm the code on your own unit's display or manual before ordering parts.
More Deye error codes
- Deye F01PV input polarity is reversed at one or both DC inputs.
- Deye F02PV insulation resistance to earth is below the safety limit.
- Deye F03Ground fault detected on the PV array (GFDI).
- Deye F04GFDI ground-failure alarm: the PV array or inverter is not properly earthed.
- Deye F05Control-board EEPROM read failure.
- Deye F06Control-board EEPROM write failure.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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