SECTION 1. Notwithstanding clause Forty-fifth of section 5 of chapter 59 of the General Laws, or any general or special law to the contrary, the town of Wareham may, pursuant to section 4 of said chapter 59, assess, as personal property, a solar or wind system that is capable of producing more than 25 kilowatts AC and that produces more than 125 per cent of the annual electricity needs of the real property upon which it is located and contiguous or non-contiguous real property within the same municipality that is owned or leased by the owner of the real property on which the solar or wind powered system is located.

SECTION 2. In lieu of the payment of the tax authorized in section 1, the owner of any such solar or wind powered system that is taxable as personal property in the town of Wareham may execute an agreement for payment in of lieu taxes with the town.

SECTION 3. (a) Notwithstanding any general or special law to the contrary, the town of Wareham, acting through its board of selectmen, its board of assessors and pursuant to authority granted by its town meeting, may execute an agreement for the payment in lieu of taxes with the owner of a solar or wind power system in the town; provided, however, that, unless otherwise provided by the agreement, a notice of the payment in lieu of taxes owed for each fiscal year shall be mailed to the owner and due on the dates by which a tax assessed under the General Laws would be payable without interest.

(b) The term of the payment in lieu of tax agreement shall be for a period not more than 20 years from the date of installation of the system unless the agreement contains express provisions setting forth the reason for which a period longer than 20 years is justified; provided, however, that an exemption shall not be allowed for any year within that period where the solar or wind powered system is not capable of producing energy as required under this act.

SECTION 4. Annually and not later than March 1, each owner of a solar or wind powered system described in section 1 shall execute and deliver an affidavit under oath to the board of assessors of the town of Wareham stating the: (i) type of system; (ii) capacity of the system; (iii) percentage of the annual electricity needs of the real property that were met by the system; and (iv) power generated for the previous year.

SECTION 5. Notwithstanding any general or special law to the contrary, nothing in this act shall require the owner of a solar or wind powered system and the town of Wareham to amend, modify or renegotiate an existing payment in lieu of tax agreement that was entered into or executed before the effective date of this act.

SECTION 6. This act shall take effect as of July 1, 2021.