Fox Battery SOC calibration

[AndySmithers]

I've come across a small issue. It's only shown itself in these days of Agile plunge pricing when PredBat has been earning it's keep (and some!) by force charging/discharging.
My Fox EP11 battery is sometimes showing an issue with refusing to discharge below 15%.
I had set the MINSOC On Grid to 12% and PredBat has been honouring that perfectly well.
But, lately, I have caught several instances when PredBat is setting a target SOC of 12% and yet the battery simply refuses to go below 15%.
I believe this is due to the Fox battery requiring an occasional full charge/discharge cycle to calibrate.
Full discharge, for the EP11, means 10%.
I'm unsure how to implement this.
Of course I could easily setup an automation triggered, say, once a week or month to do this.
But, how do I get this to play nice with PredBat?
What would be "really" nice is to have PredBat schedule in a full charge/discharge cycle at the best time financially based on the current prices. I.E at a time when a charge is scheduled anyway, force a 100% charge even if this would be not as cost-effective as whatever charge it had planned - and similarly with discharge, force a discharge down to minimum SOC.

Any thoughts?

[WyndStryke]

I have an automation which takes it to 100% weekly (with a reduced charge rate from 90% SoC upwards), and down to 10% monthly. This is timed for the cheap overnight period, and towards midnight, respectively.

However, it is outside predbat - it directly controls the inverter, while predbat is in read-only mode.

It should be possible to integrate it with predbat, by either writing to the input_number configuration fields, and/or overriding the current slot mode to be force discharge/charge, etc.

I had set the MINSOC On Grid to 12% and PredBat has been honouring that perfectly well.

Predbat has a variety of settings which might be affecting that.

[WyndStryke]

Take a look at the following

• input_number.predbat_best_soc_min (I think this is a hard limit, set it to 10% of the nominal kWh at the lowest, so 1.66kWh since I have a 16.58kWh nominal battery)
• input_number.predbat_best_soc_keep (this is a soft limit and the SoC can drop below it, it should be a little higher than best_soc_min)
• input_number.predbat_set_reserve_min with switch.predbat_set_reserve_enable (I have this set to number.min_soc_on_grid - but beware, it must never be set below 10%, and predbat will want to set it to 4% if it can). I have it set to 15% but predbat will change it as needed, based on either the best_soc_min, or the plan.