Southern California Edison (SCE), the largest subsidiary of Edison International, is the primary electric utility company for much of Southern California. It provides 15 million people with electricity across a service territory of approximately 50,000 square miles.
Many countries and territories have installed significant solar power capacity into their electrical grids to supplement or provide an alternative to conventional energy sources. Solar power plants use one of two technologies:
There are several solar power plants in the Mojave Desert which supply power to the electricity grid. Insolation in the Mojave Desert is among the best available in the United States, and some significant population centers are located in the area. These plants can generally be built in a few years because solar plants are built almost entirely with modular, readily available materials. Solar Energy Generating Systems (SEGS) is the name given to nine solar power plants in the Mojave Desert which were built in the 1980s, the first commercial solar plant. These plants have a combined capacity of 354 megawatts (MW) which made them the largest solar power installation in the world, until Ivanpah Solar Power Facility was finished in 2014.
Solar power includes solar farms as well as local distributed generation, mostly on rooftops and increasingly from community solar arrays. In 2023, utility-scale solar power generated 164.5 terawatt-hours (TWh), or 3.9% of electricity in the United States. Total solar generation that year, including estimated small-scale photovoltaic generation, was 238 TWh.
Topaz Solar Farm is a 550 megawatt (MWAC) photovoltaic power station in San Luis Obispo County, California, United States. Construction on the project began in November 2011 and ended in November 2014. It is one of the world's largest solar farms. The $2.5 billion project includes 9 million CdTe photovoltaic modules based on thin-film technology, manufactured by U.S. company First Solar. The company also built, operates and maintains the project for MidAmerican Renewables, a Berkshire Hathaway company. Pacific Gas and Electric will buy the electricity under a 25-year power purchase agreement. According to First Solar, it created about 400 construction jobs.
The California Valley Solar Ranch (CVSR) is a 250 megawatt (MWAC) photovoltaic power plant in the Carrizo Plain, northeast of California Valley. The project is owned by NRG Energy, and SunPower is the EPC contractor and technology provider. The project constructed on 1,966 acres (796 ha) of a 4,365-acre (1,766 ha) site of former grazing land. It is utilizing high-efficiency, crystalline PV panels designed and manufactured by SunPower. The project includes up to 88,000 SunPower solar tracking devices to hold PV panels that track the sun across the sky.
Solar power has been growing rapidly in the U.S. state of California because of high insolation, community support, declining solar costs, and a renewable portfolio standard which requires that 60% of California's electricity come from renewable resources by 2030, with 100% by 2045. Much of this is expected to come from solar power via photovoltaic facilities or concentrated solar power facilities.
Solar power in Nevada is growing due to a Renewable Portfolio Standard which requires 50% renewable energy by 2030. The state has abundant open land areas and some of the best solar potential in the country.
Solar power in Arizona has the potential to, according to then-Governor Janet Napolitano, make Arizona "the Persian Gulf of solar energy". In 2012, Arizona had 1,106 MW of photovoltaic (PV) solar power systems, and 6 MW of concentrated solar power (CSP), bringing the total to over 1,112 megawatts (MW) of solar power. As an example, the Solana Generating Station, a 280 MW parabolic trough solar plant, when commissioned in 2013, was the largest parabolic trough plant in the world and the first U.S. solar plant with molten salt thermal energy storage.
The energy sector in Hawaii has rapidly adopted solar power due to the high costs of electricity, and good solar resources, and has one of the highest per capita rates of solar power in the United States. Hawaii's imported energy costs, mostly for imported petroleum and coal, are three to four times higher than the mainland, so Hawaii has motivation to become one of the highest users of solar energy. Hawaii was the first state in the United States to reach grid parity for photovoltaics. Its tropical location provides abundant ambient energy.
The Blythe Mesa Solar Power Project, also known as the Blythe Solar Energy Center, is a 235 megawatt (MWAC) photovoltaic power plant near the city of Blythe in Riverside County, California. It occupies about 2,000 acres of public land managed by the Bureau of Land Management in the Mojave Desert. The construction uses CdTe thin film panels from the U.S. firm First Solar, and the majority of the output is being sold to Kaiser Permanente and Southern California Edison under 20-year power purchase agreements.
The 21 megawatt Blythe Photovoltaic Power Plant is a photovoltaic (PV) solar project in California. It is located in Blythe, California, in Riverside County about 200 miles (320 km) east of Los Angeles. Commercial operation began in December 2009. Electricity generated by the power plant is being sold to Southern California Edison under a 20-year power purchase agreement. Another 20 MW plant called NRG Solar Blythe II came online in April 2017.
A photovoltaic power station, also known as a solar park, solar farm, or solar power plant, is a large-scale grid-connected photovoltaic power system designed for the supply of merchant power. They are different from most building-mounted and other decentralized solar power because they supply power at the utility level, rather than to a local user or users. Utility-scale solar is sometimes used to describe this type of project.
The Avenal Solar Facility is a 57.7 megawatt (MW) photovoltaic power station in Kings County, California, constructed using 450,900 SHARP-128W thin-film modules. At its completion, it was California's largest photovoltaic facility.
Solar power in Florida has been increasing, as the cost of solar power systems using photovoltaics (PV) has decreased in recent years. Florida has low electricity costs compared with other states, which makes individual solar investment less attractive. Florida ranks ninth nationally in solar resource strength according to the National Renewable Energy Laboratory and tenth in solar generation by the Solar Energy Industries Association.
Solar power in Chile is an increasingly important source of energy. Total installed photovoltaic (PV) capacity in Chile reached 8.36 GW in 2023. Solar energy provided 19.9% of national electricity generation in Chile in 2023, compared to less than 0.1% in 2013.
Mount Signal Solar, also known as Imperial Valley Solar Project, is a 794 MWp (614 MWAC) photovoltaic power station west of Calexico, California, United States, in the southern Imperial Valley, near the Mexican border. The facility is being developed and constructed by 8minutenergy Renewables in three phases, with two completed as of 2018. At full build-out, it will be one of the world's largest PV solar farms with a capacity of about 800 MWp (600 MWAC). The project has been supported by several environmental groups, as the power station was built on low productivity farmland.
Desert Stateline Solar Facility is a 300 MWp utility-scale solar photovoltaic power station constructed by First Solar in San Bernardino County in California, USA. It is located at the base of Clark Mountain in California, across the state line from Primm, Nevada, and adjacent to the Ivanpah Solar Power Facility.
The Techren Solar Project is a 400 megawatt (MWAC) solar photovoltaic power plant near Boulder City, Nevada. Electricity production began with completion of the two building phases in 2019–2020. The project is co-located with several other large solar power projects in the Eldorado Valley.
