Maybe you can just silence the error for that particular write:

try:
    instrument.write_register(24, NEW_TEMPERATURE, 1) 
except minimalmodbus.InvalidResponseError:
    pass

Another time disabling return slave address checking would be useful: accessing single connected devices by their "universal" address such as 0xF7 or 0xFF.

Unfortunately, silencing errors with a try block has the unfortunate side effect of making the value returned from the Instrument unusable except by trying to parse the string that comes back in the error. So a simple pattern like using the universal address to query the register that contains the device's real address won't work.

In my case I wanted to change the slave address of an Epever XTRA3210N Solar Charge Controller.

With some reverse engineering of the official Epever software I found out that you cannot change the slave address to a normal register value, but you can use the function code 69 to change it.

I used the following line of code to change the address. It will probably return an error message because it cannot parse the result, but the change went through in my case.

instrument._perform_command(69, instrument._num_to_onebyte_string(newId)) (minimalmodbus v2.0.1)

Please keep in mind that the function code might be different depending on the device and that playing around with undocumented function codes can break the communication with the device.