1. A. Qualifying energy storage systems may store the following types of energy for use as electrical energy at a later date or in a process that offsets electricity use at peak times:

   1. (1) Electrical energy;
   2. (2) Mechanical energy;
   3. (3) Chemical energy; or
   4. (4) Thermal energy.

2. B. Qualifying energy storage systems shall maintain certain safety criteria, namely:

   1. (1) Use equipment certified by a nationally recognized testing laboratory (NRTL);
   2. (2) Be installed by a licensed electrician, for electrical systems; and
   3. (3) Be in compliance with all applicable building and fire codes.

3. C. Qualifying energy storage systems shall also meet the following:

   1. (1) Be installed in Maryland; and
   2. (2) Abide by Maryland regulations regarding interconnection with the electric utility and grid, if applicable.
4. D. The Administration may adjust energy storage system qualifications across program years.

Authority: Tax-General Article, §10-719, Annotated Code of Maryland

Effective date: September 10, 2018 (45:18 Md. R. 834)