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Temperatures

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TonyM1958 edited this page Jun 13, 2023 · 18 revisions

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Fox present a number of temperatures. It helps to understand what each of these may be showing:

  • Ambient Temperature: this is mis-named and is called Inner Temperature on some models. It is the temperature measured inside your inverter around the power electronics. As a result, this is normally the highest temperature you see. Temperatures up to 54C are considered 'normal' and often occur when force charging from grid for a hour or more. If this temperature goes too high, the inverter will reduce it's load or shut down until the temperature returns to safe levels.
  • Inverter Temperature: this is the temperature of the heat vanes on the back of your inverter. Normally lower than the Inner Temperature.
  • Battery Temperature: this is the temperature inside the BMS around the power electronics (called BMS Temperature in this integration). It is not the temperature of the battery cells.
  • BMS Cell Temperature High / Low: these temperatures are available in HA when connected via RS485. The BMS monitors all of the cells in the batteries. HV2600, for example, has 16 cells in each battery. If you have 4 x HV2600 batteries, the BMS is collecting 64 temperature readings across all of the cells. The raw cell data is available via the installer account. For simplicity, the BMS reports the maximum (high) and minimum (low) temperature it is seeing across all the cells via RS485.
  • DSP Temperature, Boost Temperature, Charge Temperature: these are specific to the internal temperature of the power electronics in different inverter models, such as 3 phase systems. They return 0 on H1 models.

This integration presents these temperatures like this:

Battery Cell Temperature is calculated as the average of the BMS Cell Temp High and Low.

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