(1) Improved real property upon which a renewable energy source device is installed and operated shall be entitled to an exemption in the amount of the original cost of the device, including the installation cost thereof, but excluding the cost of replacing previously existing property removed or improved in the course of such installation.
(2) The exempt amount authorized under subsection (1) shall apply in full if the device was installed and operative throughout the 12-month period preceding January 1 of the year of application for this exemption. If the device was operative for a portion of that period, the exempt amount authorized under this section shall be reduced proportionally.
(3) It shall be the responsibility of the applicant for an exemption pursuant to this section to demonstrate affirmatively to the satisfaction of the property appraiser that he or she meets the requirements for exemption under this section and that the original cost and the period for which the device was operative, as indicated on the exemption application, are correct.
(4) No exemption authorized pursuant to this section shall be granted for a period of more than 10 years. No exemption shall be granted with respect to renewable energy source devices installed before January 1, 2009.