Disputes between utilities and solar providers aren’t limited to North Carolina. (See story, Solar Industry at Crossroads in N.C.) Among the battlegrounds are Iowa, Wisconsin, Arizona and Missouri.

On Friday, the Iowa Supreme Court came down on the side of solar, ruling that a solar company was not violating state law by selling electricity generated by a rooftop installation to the city of Dubuque. Utilities Alliant Energy and MidAmerican Energy unsuccessfully argued that third-party purchase power agreements such as the one involving Dubuque violate state laws giving them exclusive energy sales rights.

In Wisconsin, We Energies has filed a proposal with state regulators to bar its customers from leasing solar arrays. The company also seeks a surcharge on customers who are generating their own power.

Arizona Public Service Company wants the change the state net metering rules, offsetting a solar credit with a monthly charge, and state lawmakers there are considering a tax on rooftop installation.

In Missouri, Ameren and Kansas City Power & Light are asking the state Public Service Commission to end all solar rebates.

The Wisconsin, Arizona and Missouri cases await resolution.