The Interconnection Agreement

Feb 9, 2020


Welcome to Barrett Propane Prescott's Generation Interconnection Services page! In this article, we will explore the details of the Interconnection Agreement for small-scale generation projects connecting at Extra High Voltage (EHV) and High Voltage (HV) levels.

What is an Interconnection Agreement?

An Interconnection Agreement is a contractual agreement that outlines the terms and conditions for connecting a small-scale generation system, producing less than 20 MW, to the EHV/HV grid. It is a critical step for individuals or businesses generating electricity from renewable sources, such as solar or wind, to ensure a seamless and reliable integration with the existing power grid.

Why is the Interconnection Agreement Important?

The Interconnection Agreement is crucial for several reasons:

  • Facilitating Grid Integration: The agreement specifies technical requirements, procedures, and safety measures necessary for the seamless integration of small-scale generation systems into the EHV/HV grid. It ensures that the produced electricity can flow efficiently, minimizing disruption to the grid.
  • Ensuring Compliance: The agreement ensures compliance with regulatory standards and guidelines set by local authorities and utility companies. This compliance guarantees the safety and reliability of the entire power distribution system.
  • Protecting Rights and Benefits: The Interconnection Agreement outlines the rights and benefits of the system owner. It includes provisions related to electricity pricing, billing, metering, and any potential compensation for excess energy generation fed back into the grid.

Key Elements of the Interconnection Agreement

The Interconnection Agreement typically consists of several key elements:

Technical Specifications

This section specifies the technical requirements that the small-scale generation system must meet to ensure safe and efficient integration. It covers aspects such as voltage levels, frequency, synchronization, protection, and control systems.

Interconnection Process

This part outlines the step-by-step process for connecting the small-scale generation system to the EHV/HV grid. It includes information about the application process, feasibility studies, impact assessments, system design, equipment installation, and system testing procedures.

Metering and Data Exchange

Provisions related to metering, data collection, and exchange are specified in this section. It outlines the type of meters required, measurement methodologies, data reporting intervals, and responsibilities for meter maintenance and calibration.

Power Purchase Agreement

In some cases, the Interconnection Agreement may include a Power Purchase Agreement (PPA) between the system owner and the utility company. The PPA defines the terms for selling excess energy back to the grid at agreed-upon rates.

Liability and Insurance

The Interconnection Agreement also addresses liability and insurance requirements. It ensures that all parties involved in the generation, transmission, and distribution of electricity are adequately protected against potential damages, risks, or accidents.


The Interconnection Agreement is an essential document for small-scale generation projects connecting at EHV/HV levels. It provides a framework for a smooth integration process and defines the rights, responsibilities, and technical specifications required for successful grid interconnection. Barrett Propane Prescott understands the complexity of this process and offers comprehensive services to guide you through the entire interconnection journey. Trust us to assist you in achieving reliable and sustainable energy generation.