I have a 3-phase 4-quadrant electricity meter installed because I have a photovoltaic plant on the roof of house. A 4-quadrant electricity meter means it can measure both consumption and generation of energy (forward and reverse direction).
Let's assume I have an home appliance consuming 1 kW of energy and I'm generating 1 kW of energy from a PV plant at the same time. The appliance is connected to phase A and the generator is connected to phase B.
After one hour what will be the change in readings? Will it be 0 kWh consumed & 0 kWh generated or 1 kWh consumed & 1 kWh generated and why?
My location is Slovakia, EU, the meter is Itron ACE6000.
In Slovakia (as of 2013) it's better to consume the generated energy myself than to feed it back to the network, which should be (and is for me) the most important reason to build a PV plant.