A clean energy group estimates the proposed charge would cost a typical residential solar customer $180 a year.
The rural electric cooperatives are testing how the storage technology can help customers and their systems.
A recently appointed Public Service Commission chair faces a confirmation hearing Tuesday in the state Senate.
Eagle Point Solar president Barry Shear says he’s prepared to take his case to state’s top court to clarify rules.
The projects include a solar farm that would likely be the largest in the country outside of the West.