SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2
Deye F41 error code
Parallel system stop: at least one inverter in the parallel system is off or stopped.
Likely causes
- One inverter powered down
- Fault on another parallel unit
- Parallel cable or address problem
- Mismatched firmware between units
Checks to run, in order
- 1Check every unit's on/off status
- 2Check the fault code on each unit
- 3Check the parallel wiring
Fixes
- Bring all units online and restart them together
- Clear the fault on the stopped unit
When to escalate
If all units are healthy and F41 persists, the distributor should review the parallel configuration.
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 F41 mean?
Parallel system stop: at least one inverter in the parallel system is off or stopped.
How do I fix Deye F41?
Bring all units online and restart them together Clear the fault on the stopped unit
When should I escalate Deye F41?
If all units are healthy and F41 persists, the distributor should review the parallel configuration.
Can I reset Deye F41 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F41 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F41?
Deye F41 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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