[Feature Request] Individual battery data for multiple Powerwall installations

[ejbatts]

Is it possible to extract data from separate powerwalls attached to a single gateway? I have 2 powerwalls connected to separate phases of a 3 phase installation. Specifically, I would like to know battery load (charge/discharge rate) of each battery so I can calculate actual house loads on each phase. The CTs only measure house loads LESS whatever the battery is supplying.
This separate data is available on //[gateway ip address]/system page, as well as voltage and state of charge, but I don't know how to extract it in HA.

[ejbatts]

I have noticed the same request was posted here #681