You could try something like Solar Analytics. It comes with a 6 CT (Current Transformer) version.I'm using this now to monitor my consumption (incoming 3-phase power) and generation (inverter). This will use 4 CTs (if you only have 1 inverter). You can then use another clamp on the battery (since it's AC coupled).Waiting for my VPP battery (will be a long wait since I haven't even gotten the inspection yet).Hope this helps...