FoxESS Community - Owners & Installers Forum

Hello,

It seems that the API does not allow us to retrieve the temperature of EP11 batteries in the same way it is displayed in the application. The batTemperature endpoint appears to return an average temperature, whereas the application shows the minimum temperature of the cells.

How can we retrieve this minimum temperature via the API? Is the corresponding endpoint exposed?

Kind regards.

You’re correct it isn’t exposed, we’ve been asking for it ever since the OpenApi was developed and despite early indications that it would be added, more recently they have confirmed it won’t be.

That said, to their credit what Fox have done recently is to return the BMS charge / discharge current sensors, which are effectively the end results of cell temperature. You’ll find those returned in the get device real time data api call. The variables are ‘maxChargeCurrent’ and ‘maxDischargeCurrent’

Thank you for the response.

Indeed, do you mean that instead of monitoring the temperature directly, I only need to monitor the charge/discharge power to deduce whether the cells are too cold?

I hadn’t thought of that. What values are ideal? Is there a reference table for this?

Here is an older video, and should give you some frame for reference.



ETA: Dave might have some better information, but the above could help.