Customer Generation

To help meet our customers' electricity needs, Rocky Mountain Power is committed to using reliable, cost-effective, renewable energy sources.

We partner with our customers to ensure safe and reliable interconnection of customer-owned private generation systems with the electric grid.


Smaller Projects

Before you install private solar

Investing in a small generation system may require a large upfront expense and future maintenance commitment. The checklist below can help you determine if a small generation system is right for you.

PDF Rooftop Solar Checklist

Customer generation & net metering

Please note: Customer generation rules, credits and rates are subject to the oversight and changes made by the applicable state public utility commission.

Utah net metering update

On Sept. 29, 2017, the Public Service Commission (PSC) of Utah approved a settlement agreement between several stakeholders related to residential customer generation.

The settlement agreement included a diverse group of interested parties, including rooftop solar companies, solar generation advocacy groups, environmental advocacy groups, and government and non-government organizations.

See Frequently Asked Questions »

Typical project steps
  1. Plan your system. Ensure the inverters conform to IEEE 1547 and UL 1741, and the installation follows the National Electric Code (NEC), as well as any applicable state and local jurisdiction rules.
  2. Apply for building permits and apply for interconnection approval with Rocky Mountain Power. The application is available by clicking on your state below.
  3. After you have received approval from Rocky Mountain Power and also have approved building permits, build your generation system.
  4. Have your generation system inspected by the local Authority Having Jurisdiction and forward the completed inspection report to us.
  5. After we receive a copy of the approved inspection, Rocky Mountain Power will schedule a metering professional to install the metering equipment within 10 business days.
  6. With the meter installed, start generating power.

If you are considering a customer generation project, review these helpful resources and call toll free at 1-800-625-6078.

How long does it take to complete the interconnection process?

Graphic is representative of typical project timing.
Actual length of time may vary.

Technical requirements for safety and reliability

Some of the technical requirements for interconnection to the electrical grid are:

  • Effective grounding – Your generation system must be effectively grounded. Most utility distribution systems in North America, including most of our utility distribution lines, are multi-grounded systems. This means there is a separation of your grounding system and our grounding system in the event of faults on either utility or customer generation equipment. Effectively grounded generation sources are required on multi-grounded systems in order to prevent dangerous over voltages during short circuit events, which serves to protect both customer and utility equipment.
  • Protection against islanding – You will be required to provide an “anti-islanding” scheme. Islanding is a condition in which a portion of Rocky Mountain Power’s system can stay energized and operate by itself even when our sources are de-energized. If warranted, you will be required to pay for protection against islanding.
  • Disconnect switch with visible break –Your distributed energy resource facility must include a UL listed AC disconnect switch that provides a visible break, is lockable in the open position, and is located between the production meter and the sub-panel or other connection to the generating facility. Your disconnect switch must be accessible to Rocky Mountain Power personnel at any time of the day. Specific requirements may vary by state and system size.
  • Protection system meets the latest IEEE 1547 standard – For non-net-metered generation, it must also meet Policy 138 - Distributed Energy Resource (DER) Interconnection Policy (PDF). For your protection, if the system does not meet the necessary standards, you will be responsible for purchasing and installing additional protection equipment.

A full scope of the interconnection requirements for your installation will be sent to you after your interconnection request is received. Please provide your application to Rocky Mountain Power prior to any installation activity to ensure inclusion of the full scope of requirements in your detailed designs.

PDF Solar Installer Checklist

State applications & details


Larger Projects

Partial requirements

If you want to generate electricity from renewable or nonrenewable resources to cover a portion of your needs, but still want the reassurance that Rocky Mountain Power's system will be ready to serve, then a Partial Requirements agreement may be right for you.

Qualifying Facilities

If you are planning a larger generation project – greater than 25 kW – and plan to sell power to Rocky Mountain Power, information is available on qualifying facilities, grid connection requests and market-based incentives.

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