The definition of "net" metering is that your PV produced power will either slow down the KW-Hr meter or reverse it. That is the basis of the term "net". Net=PoCo-PV During the day the meter should be going backwards because you are producing more than you use. At night the meter is going forward, based on how much power you are using.
The PoCo sometimes likes this setup because it helps stabilizes the neighborhood network. They don't like buying the power at retail price. They also are concerned that when the utility sources go away and your PV array tries to supply the neighborhood. That could lead to a situation where your PV system will energize wires that are supposed to be dead. That is why any grid tie inverter will have circuitry to prevent backfeeding a non-energized neighborhood.
