Partner Academy · Deye
Fault
F20
Tz Dc OverCurr Fault
Off-grid DC overcurrent fault
Deye service: Tz Dc OverCurr — off-grid inrush on backup.
Field checks
- Reduce inrush currents of loads fed from the backup port in off-grid mode.
FAQ
What does Deye F20 mean?
Off-grid DC overcurrent fault
What should I check for Deye F20?
- Reduce inrush currents of loads fed from the backup port in off-grid mode.
When should I contact Inversol?
After noting the exact code, model, SN, and operating mode, complete the field checks. If the code returns after a clean power cycle, contact Inversol WhatsApp support with a photo of the display.
Partner lookup — not a substitute for the official Deye service manual or live measurements. Firmware maps can differ by model family.