BillK-AZ
Senior Member
- Location
- Mesa Arizona
Does anyone know, as a measured fact, how the present generation of bi-directional meters measures and reports the following situation:
-PV inverter, connected L1 to L2 for a nominal 220V service, is producing 5 kW
-The local load is also 5 kW, but is all on L1 to N
An older analog (spinning disk) meter would read zero because the forces driving the disk balance.
Does the modern digital meter do the same?
Or, does the digital meter record both a forward 2.5 kW (L1) and a reverse 2.5 kW (L2)? Makes a difference if there are different rates for buying and selling.
I asked this of a local utility years ago and they said they did not know for sure and had never measured such a situation as a test (meter shop did not have access to a PV system).
-PV inverter, connected L1 to L2 for a nominal 220V service, is producing 5 kW
-The local load is also 5 kW, but is all on L1 to N
An older analog (spinning disk) meter would read zero because the forces driving the disk balance.
Does the modern digital meter do the same?
Or, does the digital meter record both a forward 2.5 kW (L1) and a reverse 2.5 kW (L2)? Makes a difference if there are different rates for buying and selling.
I asked this of a local utility years ago and they said they did not know for sure and had never measured such a situation as a test (meter shop did not have access to a PV system).