Clean Energy Purchasing Mechanisms OER, in partnership with the Division of Purchases, has developed several Master Price Agreements to expedite Lead by Example projects. Master Price Agreement 508 (MPA 508) was developed for turnkey energy efficiency projects. This purchasing mechanism expedites energy efficiency implementation by clearly defining proposal requisition processes and providing access to a pool of prequalified energy services vendors. Master Price Agreement 509 (MPA 509) was developed to streamline the process for public entities to install electric vehicles charging stations. Master Price Agreement 553 OE (MPA 553) - open enrollment - is to establish a list of qualified firms to provide turnkey solar installation and maintenance services to public sector entities. For more information on clean energy purchasing mechanisms, please contact Nathan Cleveland at Nathan.Cleveland@energy.ri.gov