It shouldn't come as a surprise that "net metering" has become such a contentious issue, especially in states like Arizona and Nevada. Where there's lots of sunshine and growing numbers of solar-power installations at homes and businesses, whose owners expect to be compensated for the excess electricity they generate, huge potential exists to disrupt the income stream of electric utilities.
The utilities are by no means awaiting that disruption placidly. Under lobbying pressure, Nevada has approved new charges for net metering (also called "net energy metering," or NEM), and Arizona is looking at completely eliminating its net metering program. Whether sunny or cloudy, states are the battlegrounds because there is no overarching federal net metering policy. Forty-six of the 50 states have some form of net metering in place with varying types of regulation.