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Partner Academy · Deye

Warning W4

Meter Comm Fail

Energy meter communication failure

Deye service: Meter Comm Fail — RS485 / Modbus meter link.

Field checks

  1. Inspect the communication cable between inverter and smart meter.
  2. Confirm RS485 A/B pinout matches both ends.
  3. Verify the meter Modbus address matches the inverter menu.

FAQ

What does Deye W4 mean?
Energy meter communication failure
What should I check for Deye W4?
  1. Inspect the communication cable between inverter and smart meter.
  2. Confirm RS485 A/B pinout matches both ends.
  3. Verify the meter Modbus address matches the inverter menu.
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.

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