SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2
Deye F15 error code
AC output overcurrent detected in software (backup or common load).
Likely causes
- Backup load above the inverter's continuous rating
- Motor or compressor starting surge
- Low grid voltage causing higher current
- Load-sharing problem in a parallel system
Checks to run, in order
- 1Calculate and clamp the backup and common load current
- 2Check the backup output for a short circuit
- 3Measure the grid voltage
- 4Check load sharing if the system is paralleled
Fixes
- Shed or stagger the loads
- Reduce the backup load within rating
- Restart and retest
When to escalate
If the load is within rating and F15 recurs, ask the distributor to check the AC current sensing and output stage.
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 F15 mean?
AC output overcurrent detected in software (backup or common load).
How do I fix Deye F15?
Shed or stagger the loads Reduce the backup load within rating Restart and retest
When should I escalate Deye F15?
If the load is within rating and F15 recurs, ask the distributor to check the AC current sensing and output stage.
Can I reset Deye F15 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F15 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F15?
Deye F15 is documented for SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2. 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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