Engineering notes
When you need both a main meter and branch meters
A main meter matches the utility bill. Branch meters split cooling, pumps and lighting.
One main meter does not answer “how much did cooling use”
The main meter matches the electricity bill. Branch meters split cooling, pumps, lighting and sockets. Owners ask about saving — without branches you only know the total.
One main meter is enough for a single-system workshop. Add branches when several trades share a board, or when each leased floor needs its own meter. Energy monitoring · Modbus meters