My system: Victron Multiplus II, 48/3000/32-35 Device id 261
2 x BlueSolar 150/35
#1 - 6 AmeriSolar 330W panels (3S2P) Device id 258
#2 - 3 AmeriSolar 330W panels (3S) Device id 260
1 Carlo Gavazzi Energy meter / ET112 Device id 30
2 x Pylontech US2000Plus Lithium Ion batteries Device id 512
Electrical Pre paid meter.
Lots of comm cables between all... ;)
Also have some SCT-013-0000 CT's around feeds, feeding into OpenEnergyMonitor
(For reference I consume these topics on the OEM using the NodeRed deployment, and then publish back to the OEM MQTT broker, which then allows me to graph the values).
Rail #1 Power Comes into Electrical Pre Paid meter, then to Master Isolator, Earth Leakage and then into a 2 source switch (switching between Grid Feed or Geni Feed), Feeds into Rail #2
Rail #2 (Non Essentials): Rail Isolator, Earth Leakage, 40 Amp Stove, 2 x 20Amp, Geyser 1 and 2, 20Amp Pool
Into Multiplus II / AC In
Out of Multiplus II AC Out 1 into -> Rail #3 at <Inverter input>
Rail #3 (Essentials): Rail Isolator, <Inverter input>, Isolator, Earth Leakage, 5 x 20Amp isolators (plugs), 3 x 10Amp isolators (lights)
Things I think want to monitor,
Main Grid (Eskom) input, thinking what ever the ET112 allows through.
Power, Voltage, Amperage Feed per Array 1 and Array 2, and then guess a total combined Input values (Power, Voltage and Amperage)
Power going from Inverter back to Rail #2
Power going from Inverter out to Rail #3
Think then... Total usage... and the composition, total usage = Grid + PV + Battery