The company recently filed an application with the Idaho Public Utilities Commission seeking approval for its Community Solar Pilot Program.
The proposed 500-kW solar array would be built southeast of Boise and power about 1,000 homes and 500 businesses.
The company in an announcement last week says it plans to offer subscriptions costing $740 for individual solar panels. Buyers would receive credit for their portion of the solar array's output on their monthly bill.
Most of the $1.2 million cost would be paid by subscribers.
The company says its customers in southern Idaho and eastern Oregon who don't participate will have no additional expense
Idaho Power says the project could be finished by June if approved.