GoodWe grid power intermittently shows incorrect values

Description

EVCC intermittently reads incorrect grid power values from my GoodWe GW8K-ET.

The GoodWe native app shows the correct grid power. EVCC normally reads values such as -3.3 kW, but intermittently changes to incorrect values such as -52.8 kW. The incorrect value can remain for several reading cycles and then return to the correct value.

After a complete power cycle of the Raspberry Pi, the readings were correct for several hours, but the problem returned later.

This can cause the PV charging control to incorrectly assume a very large surplus and increase the charging power of the Easee wallbox.

The problem persists with EVCC v0.315.2.

Steps to Reproduce

1. Configure a GoodWe ET/EH/BT/BH Hybrid Inverter (WiFi) as the grid meter.
2. Enter the GoodWe GW8K-ET IP address.
3. Save the configuration and let EVCC run normally.
4. The grid power is initially read correctly, for example -3.3 kW.
5. After some time, EVCC intermittently reads an incorrect value, for example -52.8 kW.
6. After several reading cycles, the value returns to the correct value.
7. A complete power cycle of the Raspberry Pi temporarily restores correct readings.
8. The GoodWe native app continues to show the correct grid power.

⚠️ RETURN TO EVCC TAB → COPY STEP 2 → PASTE HERE

Version

v0.315.2

System

linux/arm64, CEST +02:00