SG04LP3/SG05LP1 hybrid families and SG01HP3-EU-DM2
Deye F35 error code
No AC grid supply detected.
Likely causes
- Grid outage
- AC input breaker or MCB open
- Loose AC terminals
- Grid voltage or frequency outside the configured window
Checks to run, in order
- 1Confirm supply at the main distribution board
- 2Check the AC breaker and terminals
- 3Measure grid voltage and frequency at the inverter
Fixes
- Restore the grid supply
- Close the breaker and re-torque the terminals
- Wait for the inverter to reconnect
When to escalate
If the grid is healthy at the terminals and F35 persists, the distributor should check the AC input detection board.
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 F35 mean?
No AC grid supply detected.
How do I fix Deye F35?
Restore the grid supply Close the breaker and re-torque the terminals Wait for the inverter to reconnect
When should I escalate Deye F35?
If the grid is healthy at the terminals and F35 persists, the distributor should check the AC input detection board.
Can I reset Deye F35 myself?
Only after isolating the AC and DC sides and running the checks above. If Deye F35 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Deye F35?
Deye F35 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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