Which batteries with which Firmware Version do you have exactly?
hi Mike,
I had the same problem, and I upgraded the firmware to version 143 this morning (you have to ask the Marstek support to enable this version, you do this by using the feedback option in the ap. You will receive an email when the update is made available for you and then can open the app and get asked if you want to do the update) and my temperature in HA is now displayed the right way, as well as a few options that were ‘unknown’ previously (which happened to be quite important ones like the power in and power out) are now also displayed.