I have node-red running on my router (WRT32X) and use MQTT to talk to my CCGX.
https://flows.nodered.org/node/node-red-contrib-homekit-bridged is used to integrate node-red with HomeKit.
An Apple home-pod mini provides the Siri interface.
Siri can control the Multiplus inverter, report battery levels, and let me know how much solar is being generated. Solar isn't a supported HomeKit accessory so I emulated a light sensor that reports the solar wattage as Lux instead.
Exciting times ahead for all tinkerers with the recent announcement of Venus OS Large, we're just scratching the surface of what's possible.