swgb, all buildings in AB do not have panels. there is one house that has a roof full.
aabsolute, net metering is great, it must be very fulfilling to know one is getting a credit from the power supplier. It does take a good amount of panels to be able to do so though. also, do you remember if the person had batteries. If he did, great, then he's using his collected energy at night. if not, then he's still using the power company at night. either way he's paying less. as panels become cheaper, it will enable more and more people to go PV. builders should be considering wiring new construction for future panels.
That homeowner is tied into the grid. Most of the time he is drawing power from the grid. At other times during the day he is harvesting and generating surplus which is returned to the grid causing his meter to spin backwards.