Senate Bill 188 would have established a voluntary, subscription-style option for businesses or individual homeowners to purchase shares of a solar array. They could then be credited on their monthly bill for the electricity generated by the solar panels.

Gov. Greg Gianforte stamped the bill with a veto Friday. He said the bill was not specific enough on how it would be implemented.

The bill tasked the Public Service Commission with setting up the credit rate solar subscribers would be given on their utility bills. As justification for the veto, Gianforte claimed the credits could potentially raise rates for other energy customers.