Renewable Energy

From the sun to biomass, renewable energy resources use clean, inexhaustible sources to power modern-day life.

Often referred to as clean or green energy, there are a number of characteristics that make an energy source renewable. A renewable energy source:

  • Comes from nature or a natural process, such as wind or sunshine
  • Is replenished by nature quickly when compared to conventional energy sources such as natural gas
  • Is nearly inexhaustible over the long term but is limited in the amount of energy that can be produced in the short term
  • Is environmentally friendly and plays a role in reducing carbon dioxide emissions

Our renewable energy portfolio

SRP takes a balanced and measured approach to adding renewable energy sources to meet sustainable energy targets while continuing to deliver affordable power reliably. The Board of Directors has responsibility for setting renewable energy goals and approved a new framework in October 2017 to guide the process. This framework, the 2035 Sustainability Goals, focuses on creating a sustainable future and builds upon the Sustainable Portfolio plan, which set renewable energy goals through 2020.

In addition, given the growing risks associated with the changing climate, these efforts are another way by which SRP will significantly and steadily reduce greenhouse gas emissions. We are committed to help our customers achieve their clean energy goals and reduce the risks of climate change on Arizona communities and our region.

Renewable energy portfolio

Source Total capacity - Megawatts
Biomass 14
Solar, utility-scale 142
Solar, rooftop 106
Wind 127
Geothermal* 43
Hydropower 383
Total 815

About our renewable portfolio

The two types of solar in SRP's mix, utility-scale and rooftop, show the amount of energy being produced by large solar facilities separate from what is produced by residential rooftop installations. Rooftop solar includes any residential solar panel units that were installed as a result of a special customer offer. SRP then retains the renewable energy credits for these.

The renewable energy capacity is updated on an annual basis at the end of SRP's fiscal year, which is May 1, 2017, through April 30, 2018.

*Currently, 55 MW of geothermal are being sold to another utility under short-term contracts and are not counted toward SRP's Sustainable Portfolio for the duration of the contracts.

More than clean air

Did you know that renewable sources reduce carbon emissions, conserve water and use waste as fuel? Learn more about how the sources in SRP's portfolio support a healthy environment.

  • Biomass: The Novo BioPower Plant in Snowflake, Arizona uses combustion fuel, like wood, to generate power. The plant is required to obtain the majority of its fuel from forest thinning, which reduces the amount of unusable wood going to the landfill and contributes to healthy forests.
  • Solar and wind: Both solar and wind generation take advantage of nature as an energy source using significantly less water than conventional power generation. Last year, SRP saved nearly 1.9 billion gallons of water by conserving energy and relying on these less-water-intensive types of generation.
  • Geothermal: Using no fuel and producing almost zero emissions, geothermal takes advantage of the heat produced by superheated water reservoirs below the Earth's surface to generate electricity. It also recycles the steam and water used by injecting it back into the Earth, renewing the geothermal resource.

Your energy grid to get a major boost of solar

Carbon dioxide emissions will be reduced as a result

SRP customers will see an increase in solar thanks to a plan that will add 1,000 megawatts (MW) of new solar energy to our system by 2025. The plan will accelerate both the pace and the total amount of our solar energy resources by 700 MW compared to current resource plans during the same timeframe.


New battery storage system in the works

Adding battery storage to the grid will provide other energy options to meet peak demand

Utility scale energy storage systems are poised to be a vital part of modernizing the grid and SRP recently signed a contract to begin construction on a new 10-megawatt, 40 megawatt-hour stand-alone battery storage system. This is the third battery storage project that launched in May, 2018 as part of an initiative to learn how to incorporate utility scale energy storage systems into the electricity grid.


Kayenta Solar facility expanded

Second phase, Kayen II, will be a 28-megwatt expansion

SRP joined with officials from the Navajo Tribal Utility Authority (NTUA) and Navajo Nation leaders to break ground on the second phase of the Kayenta Solar facility, Kayenta II, this past August. Adding to the celebration was a surprise visit by Jonathan Scott of HGTV’s Property Brothers who came to learn more about what the new facility can do for the Navajo Nation.

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