Partner Academy · Deye
Warning
W21
Zero Export Warning
Zero-export mode active
Deye service: Zero Export Warning — same meter/CT path as W20.
Field checks
- Check Zero Export / export-limit settings.
- Confirm CT arrow direction matches the installation diagram.
FAQ
What does Deye W21 mean?
Zero-export mode active
What should I check for Deye W21?
- Check Zero Export / export-limit settings.
- Confirm CT arrow direction matches the installation diagram.
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.