BOISE, IDAHO — Idaho is going green whether it wants to or not.

The Idaho Public Utilities Commission in the last several months has approved agreements with 13 solar power projects.

A combination of federal regulations, tax incentives, cheaper solar panels and a rate-calculating method developed by the commission itself has made solar power economically attractive.

But commissioners and Idaho Power Co. officials say the projects could end up costing ratepayers more because utilities will face uncertainties by being forced by federal rules to integrate power from a source that fluctuates with the sun.

“There’s a point where we can’t continue to take intermittent power without harming our customers,” said Idaho Power spokesman Brad Bowlin.