Before we get to the “how to” part, there are a couple of important things you need to know.

Need to know #1: SoC tracking is currently only available for lead-acid batteries. LiFePO4 is in development as I type this, but is not yet completed.

Need to know #2: SoC tracking is only available with HQ 0.55 or later and BC Model 2 Version 2.0 or later.

Need to know #3: the SoC tracking assumes your charge controller has a float phase at 13.8V.

And finally, need to know #4: SoC tracking takes time to analyse your system before it begins producing results, potentially up to a couple of days. Patience is key here. And the HQ doesn’t analyse your system once, it continually analyses your system to provide ever more accurate values as time goes on.

Now that’s out the way, here’s what you do on each of your BC’s:

  1. Set the battery chemistry
  2. Set the battery capacity

Do this in the Modules -> {battery} page. Set the chemistry from the available options, and set the capacity to the manufacturer’s (usual) 20h discharge capacity.

And that’s it. The HQ will start analysing your system until it has gathered the info it requires, then it will begin producing SoC values.

Each battery’s SoC is shown in the Storage -> Now page, as is the aggregate SoC. The aggregate SoC is also shown in each of the status panels.