SECTION 1. Section 5 of chapter 59 of the General Laws, as amended by sections 10 to 16, inclusive, of chapter 218 of the acts of 2018, is hereby further amended by inserting after clause Forty-fifth A the following clause:

Forty-fifth B, Any energy storage system, as defined in section 1 of chapter 164, which is being utilized for the energy needs of property taxable under this chapter; provided, however, that the exemption under this clause shall be allowed only for a period of 20 years from the date of the installation of such system.  This clause shall take effect upon its acceptance by any city or town.

SECTION 2. Section 6 of chapter 64H of the General Laws, as amended by section 4 of chapter 90 of the acts of 2018, is hereby further amended by adding the following subsection:-

(yy) Sales of energy storage systems, as defined in section 1 of chapter 164.

SECTION 3. Section 146 of chapter 164 of the General Laws, as appearing in section 18 of chapter 227 of the acts of 2018, is hereby amended by striking out the words “Electric distribution companies shall file an annual electric distribution system resiliency report with the department” and inserting in place thereof the following words:- Not later than October 1, 2020, and not later than October 1 of each year thereafter, electric distribution companies shall file an annual electric distribution system resiliency report with the department and the joint committee on telecommunications, utilities, and energy.

SECTION 4. On or before January 1, 2020, the department of energy resources shall establish a rebate for Massachusetts-based companies installing and manufacturing energy storage systems, as defined in section 1 of chapter 164 of the General Laws. The department may consider using, but shall not be limited to, the following funding sources for said rebate:  (i) energy efficiency funds under section 19 of chapter 25 of the General Laws provided that such funds shall only be used if the department determines that the energy storage system installed at a customer’s premises provides sustainable peak load reductions on either the electric or gas distribution systems and is otherwise consistent with section 11G of chapter 25A of the General Laws; and (ii) alternative compliance payments established and administered pursuant to section 11F of chapter 25A of the General Laws.  The department shall promulgate regulations consistent with this section.

SECTION 5. Subsection (yy) of section 6 of chapter 64H of the General Laws is hereby repealed.

SECTION 6. Section 5 shall take effect on December 31, 2027.