Yes - 4 seems to be the inverter, it will show battery data since the batteries are connected to it.
Device 3 seems to be the energy meter but I’m not sure.
From my observation so far, these are the codes and what it represents. Still looking for EV charger though (I do not have EV charger)
1 = wifi dongle
2 = inverter
3 = energy meter
4 = battery
@zmszaman has created this custom integration for Solplanet inverters