Puerto Rico - Interconnection Standards

May 30, 2024


In 2007, the Autoridad de Energía Electrica de Puerto Rico (PREPA*) adopted interconnection standards based on the standard contained in the federal Energy Policy Act of 2005. PREPA promulgated interconnection rules in August 2008 that apply to all distributed generation (DG) projects that interconnect to PREPA’s electric distribution system. Interconnected systems must meet all safety and performance standards established by IEEE Standard 1547 as well as local construction and safety codes. A manual external disconnect switch is required for all interconnected systems.

Customer-generators seeking to interconnect first submit a standardized "Evaluation Request" to PREPA to determine whether or not the system will qualify for the "Simple Interconnection Process." The Simple Interconnection Process applies to inverter-based systems no more than 25 kW in capacity for single-phase systems, and no more than 200 kW for three-phase systems, and which meet additional technical requirements. If the system does not qualify for the Simple Process, PREPA requires a "Supplemental Study," which will determine if improvements are required to PREPA’s electric distribution system or if changes to the DG design are needed in order to safely connect the DG. The applicant will pay for related costs.

Once approved for interconnection and after all safety tests have been conducted and certified, PREPA and the customer-generator sign a standard interconnection agreement. The regulations state that the customer-generator must also secure general liability insurance ($100,000 in coverage for systems 10 kW or less, and $1 million in coverage for systems over 10 kW) and that PREPA must be endorsed as an additional insured on the policy; however, according to PREPA, it does not require this for residential, net-metered customers.  Instead, these customers must sign an agreement stating that they assume responsibility for any possible damages their systems might cause to PREPA's.

On May 27, 2014 it was decided that, the Energy Commission may require reliability studies for the interconnection of generators with a generating capacity greater than 500 kW but less than 1 MW. PREPA is required to adopt regulations for the interconnection of distributed generators with a generating capacity of less than one (1) MW, as well as regulations for the interconnection of distributed generators with a generating capacity between 1 MW and 5 MW.

The rules provide specific guidance on time lines for application and review processes, as well as specific processes for dispute resolution. See the forms page on PREPA's web site for all forms and applications related to interconnection.

Puerto Rico has published Minimum Technical Requirements for Interconnection of photovoltaic, wind, and battery storage systems.

* PREPA, the only electric utility in Puerto Rico, is a government-owned corporation. It is governed by a board of directors that are nominated by the governor and confirmed by the state legislative assembly. The board, via resolution and after following established procedures that include a public comment period, approved PREPA's interconnection rules on July 15, 2008.

Program Overview

Implementing Sector: State
Category: Regulatory Policy
State: Puerto Rico
Incentive Type: Interconnection
Web Site: http://www.prepa.com
Start Date:
Eligible Renewable/Other Technologies:
  • Solar Thermal Electric
  • Solar Photovoltaics
  • Wind (All)
  • Biomass
  • Hydroelectric
  • Combined Heat & Power
  • Fuel Cells using Non-Renewable Fuels
  • Landfill Gas
  • Wind (Small)
  • Hydroelectric (Small)
  • Anaerobic Digestion
  • Fuel Cells using Renewable Fuels
  • Other Distributed Generation Technologies
  • Microturbines
Applicable Utilities: PREPA
System Capacity Limit: No limit specified
Standard Agreement: Yes
Insurance Requirements: Vary by system size and/or type; levels established by PREPA
External Disconnect Switch: Required
Net Metering Required: No


Name: PREPA Reglamento 7544
Date Enacted: 8/5/2008
Effective Date: 9/5/2008


Name: PREPA Customer Service
Organization: Autoridad de Energía Electrica de Puerto Ric
Address: PO Box 364267
San Juan PR 00936-4267
Phone: (787) 289-3434
Email: servicios@prepa.com

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.