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Sungrow: improve battery register check #2906

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Merged
LKuemmel merged 1 commit into from
Nov 6, 2025
Merged

Sungrow: improve battery register check #2906

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13 changes: 9 additions & 4 deletions packages/modules/devices/sungrow/sungrow/bat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -46,11 +46,16 @@ def detect_register_check(self) -> RegMode:
return RegMode.NEW_REGISTERS
except Exception:
pass

# register 13000 is always available, if unused it contains zero
# register type can only be determined if battery power is not zero
if self.__tcp_client.read_input_registers(13021, ModbusDataType.UINT_16, unit=unit) == 0:
raise ValueError("Speicherleistung aktuell 0kW. Registertyp wird gesetzt sobald "
"Speicher Leistungswerte liefert.")
try:
self.__tcp_client.read_input_registers(13000, ModbusDataType.UINT_16, unit=unit)
log.debug("Battery register check: using old_registers (13021 + 13000 bits for sign).")
return RegMode.OLD_REGISTERS
if self.__tcp_client.read_input_registers(13000, ModbusDataType.UINT_16, unit=unit) != 0:
# if battery power is not zero and register 13000 shows status bits, old registers are used
log.debug("Battery register check: using old_registers (13021 + 13000 bits for sign).")
return RegMode.OLD_REGISTERS
except Exception:
pass

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