Amends GS 105-129.16A to extend the sunset of the credit for investing in renewable energy property to January 1, 2021 (was, January 1, 2016). 

Amends GS 105-129.15 to include in the definition of renewable energy property solar energy equipment that uses solar radiation as a substitute for traditional energy for generating electricity only if all the equipment in the system has an aggregate generation capacity of less than one megawatt. Effective for property placed in service for taxable years beginning on or after January 1, 2018.