Question: Solis 1P3K-4G Modbus power-limit persistence. I have a Solis 1P3K-4G controlled locally over RS485 by ESPHome. Modbus power-limit writes work. The inverter reports DSP version 0017, LCD version 0015, and product-model code 00A8 over Modbus. My YAML writes the percentage limit to holding register 3051, but I’ve found protocol references that disagree about the separate power-off save flag and its address. For this model and firmware, is the 3051 power-limit setting temporary and cleared when the inverter sleeps or loses power? If persistence is controlled by a separate flag, what’s the correct register, bit, and polarity for the 1P3K-4G, and can that flag be read safely over Modbus? Has anyone confirmed this on the same model or firmware? I’m looking for a matching protocol reference or firsthand reports before changing any save flag.
I don’t have your inverter. However, if you are sure that 3051 limits active power, not reactive power, then you are on more recent protocol and persistence bits are on register 3068.
To be sure, read both registers 3068 and 3069. If 3069 is 0x55 or 0xAA, then your flags are on 3068.