Fronius GEN24 with BYD battery

The problem I just looked at 5pm on Homeassistant and no updates or anything done and suddenly no connection to Fronius, Fronius ist still working with the API checked that via browser like https://142.206.xxxxxxsolar_api/v1/GetMeterRealtimeData.cgi?Scope=System ### What version of Home Assistant Core has the issue? core-2025.2.3 and now upgraded to core-2025.2.4 thought it would help ### What was the last working version of Home Assistant Core? core-2025.2.3 ### What type of installation are you running? Home Assistant OS ### Integration causing the issue Fronius Integration can not connect …

Excerpt saved from GitHub on 2026-10-23.

Summary This PR fixes several runtime errors and log spam that occur when using the integration with pymodbus 3.11+ and with Fronius GEN24 inverters, particularly during nighttime when the inverter is in sleep mode. ## Root Causes Fixed ### 1. SunSpec "not implemented" sentinel values not detected The SunSpec protocol defines special bit patterns to signal that a register is not available (e.g. `0x8000` = -32768 for INT16, `0xFFFF` = 65535 for UINT16). These were previously passed through as real measurement values, causing cascading errors downstream. Fix: Added `_SUNSPEC_NAN_VALUES` …

Excerpt saved from GitHub on 2026-10-23.

Summary This PR adds Fronius GEN24 with BYD battery support and automatically detects both supported SunSpec register layouts: - `float` - `int+SF` The detected SunSpec model type is shown in the battery driver information panel. ## Changes - Added the Fronius GEN24/BYD driver. - Added automatic SunSpec Model 124 layout detection. - Uses the correct register addresses for the detected layout. - Added atomic FC16 writes for the adjacent `OutWRte` and `InWRte` registers. - Added a safe `0/0` idle power window. - Added a short idle period when changing between charging and discharging. - Added …

Excerpt saved from GitHub on 2026-10-23.