D.C. Mun. Regs. tit. 12, 12-I-Z3
The building and building site shall be provided with renewable energy equal to the EUIP on an annual basis and calculated in accordance with Section Z2.1.1. Sources of renewable energy shall comply with Sections Z3.1 through Z3.3.
On-site combustion of fossil fuels shall not be permitted for the provision of thermal energy to the building except as specified by the code official.
Acceptable sources of on-site renewable energy to be used on the building site include:
* Photovoltaic panels;
* Solar thermal systems;
* Wind turbines; and
* Biogas.
No other source of on-site renewable energy is acceptable for building design, unless the rationale for its selection is approved by the code official.
Renewable energy shall be generated on-site wherever feasible. Before procuring off-site renewable energy, a building project must demonstrate one of the following:
Exception: Where there is not adequate solar access as determined by Chapter 13 of the Energy Conservation Code-Commercial Provisions.
The procurement of off-site renewable energy is acceptable only where the energy is procured from a qualified electricity supplier providing energy from Tier 1 renewable sources meeting the minimum percentages of the District of Columbia Renewable Portfolio Standard. Acceptable methods for the procurement of off-site renewable energy include any of the following or as approved by the code official:
* Owner shall provide the code official with documentation of a signed, legally-binding contract to procure off-site renewable energy through a power purchase agreement for a minimum period of 5 years for electricity generation from, solar or wind-generation facilities that are located within the District of Columbia, Maryland, or Virginia. The owner remains subject to, and must comply with, the District of Columbia's Renewable Portfolio Standard;
* Connection to a renewable energy microgrid; or
* Connection to a low-carbon neighborhood thermal energy system.
D.C. Mun. Regs. tit. 12, 12-I-Z3