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SRP’s renewable energy plans

We’re investing in a cleaner, greener future by expanding our renewable energy portfolio. Learn about our commitment to reliable, sustainable power.

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    Our energy mix 

    As part of our commitment to cut our carbon intensity 90% by 2050, SRP is expanding our mix of clean, renewable energy sources. In fact, we plan for nearly 50% of our energy sources to be carbon-free by 2025.


    A donut graph labeled Today’s Energy Mix with segments reflecting different energy sources.  Natural gas has the largest segment. Natural gas and coal combine for more than half of the circle. Adding nuclear brings the cumulative total to more than three quarters of the total. The remaining portion includes market, other, hydro and renewable energy sources, which include solar, geothermal, wind and biomass

    What is renewable energy?

    Renewable energy comes from natural sources, such as sunlight, wind or flowing water. Unlike traditional energy sources, like coal and gas, energy from renewable sources is almost limitless. Best of all, these energy sources emit far less greenhouse gases (the harmful gases that contribute to global warming).

    Two of SRP’s largest renewable resources – solar and wind power – are variable, meaning they fluctuate. When the sun doesn’t shine or the wind doesn’t blow, SRP must rely on traditional energy sources and batteries to meet demand.

    This blend of renewable and traditional energy sources ensures a reliable power supply for our customers.

    Solar, Geothermal, Hydro, Wind, Biomass

    Clean energy – some of these sources are variable, meaning they only produce energy when the sun is shining, wind is blowing or water is flowing.

     Coal, Gas, Nuclear

    Constant energy flow - produces more energy anytime when power needs are high.


    Hydropower uses flowing water to generate electricity. Water flows through a turbine causing it to spin, which creates energy. Next, a generator converts the energy into electricity. Then, the energy is transferred to the grid where it can be delivered to homes and businesses throughout the Valley.

    SRP first brought hydropower to the Valley in the early 1900s following the construction of Theodore Roosevelt Dam. We now operate several dams that produce hydropower. 


    Geothermal power is generated from superheated water reservoirs deep underground. Steam turns a turbine that generates electricity. The process involves no fuel and produces almost zero carbon emissions, and the steam and water used to generate energy can be returned below ground.

    SRP receives a significant amount of geothermal energy from Hudson Ranch I in California’s Imperial Valley as part of a 30-year agreement with EnergySourceOpen new site.. That’s enough energy to power 26,000 homes.


    Solar panels turn Arizona’s sunny skies into electricity, and by 2025, SRP plans to add 2,025 megawatts of solar energy to our grid, mostly through large utility-scale projects.

    SRP recently joined several battery storage projects to ensure that more solar-generated electricity is available during times of high demand. One of these projects is the Sonoran Energy Center, coming in 2023, which will be the largest solar-charged battery project in Arizona.


    Much like hydropower, wind power is generated from spinning turbines. Wind blows propeller-like blades, rotating a turbine and spinning a generator to create electricity.

    SRP was the first utility in Arizona to use wind power. Recently, we entered into a contract to purchase wind energy from the Babbitt Ranch Energy CenterOpen new site. north of Flagstaff. Enough energy will be produced to power 40,000 homes.


    SRP works with facilities like the Snowflake White Mountain Biomass Power Plant to generate biomass energy. Heat is generated by burning combustion fuel (like paper and wood). The heat turns water into steam, which turns a turbine to make power. The plant gets wood from strategic forest thinning operations and paper fibers from a newsprint paper mill, waste that would otherwise end up in a landfill.

    Renewable energy and Arizona 

    Utility-scale solar

    Whereas rooftop solar benefits individual homes or businesses, utility-scale solar benefits all SRP customers. Utility-scale solar is produced in a commercial facility such as a solar farm. The energy enters the SRP power grid where it’s shared with customers across the Valley.

    With utility-scale solar, even customers who can’t install their own solar panels can feel good knowing that a portion of their energy comes from renewable resources. Join SRP Solar ChoiceTM and offset 50% or 100% of your energy with utility-scale solar.

    Commercial customers and renewable energy 

    Custom Energy Portfolios

    As part of our goal to cut carbon intensity by 90% by 2050, SRP works with companies to meet their needs through renewable sources. We do this using power purchase agreements (PPAs) for specific large customers, programmatic subscription-type offerings and other structures that strive to meet each customer’s individual needs. If lowering your carbon footprint or offsetting your energy use with renewable sources is your goal, SRP can customize an energy portfolio for you. Our diversified renewable resource mix includes wind, geothermal, large and low-impact hydro, landfill gas and solar energy.

    Renewable news on the SRP Blog
    September 21, 2023

    Balancing a reliable, affordable and sustainable energy future 

    July 26, 2023

    Answering the Question, “How does solar work?”

    July 20, 2023

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