Question: What cities are the headquarters for the company that owns Avra Valley Solar Generating Station?

Context paragraphs:
Altar Valley: The Altar Valley is a 45-mile (72 km) long north-south valley, trending slightly northeast from Sasabe, Arizona on the Mexico border to the Avra Valley west of the Tucson Mountains.  It is delimited by Arizona State Route 86, from east-to-west on the north separating it from the Avra Valley which then trends "northwesterly", merging into the plains and drainage of the Santa Cruz River.

Avra Valley: The Avra Valley is a 50-mile (80 km) long northwest-southeast valley, bordering the west of Tucson, Arizona.  The Tucson Mountains are at the valley's center-east, with suburbs ranging east of the Tucson Mountains and trending northwest to the Avra Valley's northeast.  This entire northwest stretch from Tucson contains the northwest trending Interstate 10, the route to Casa Grande and Phoenix.  The northeast of the valley contains Marana on I-10, the Pinal Airpark, an aircraft storage park, and other communities along I-10.  Avra Valley Airport is a general aviation airport in Marana, located about 15 miles (24 km) northwest of Tucson and being used for storage of classic propeller-era airliners.

Avra Valley Solar Generating Station: The Avra Valley Solar Generating Station is a 34 MW (DC, 25 MW AC) photovoltaic power plant in Avra Valley, Pima County, Arizona, owned by NRG.  It uses single axis tracking that is designed to be maintenance free over the twenty year design life of the system.  The panels are mounted on a north-south axis and rotate each day to follow the sun from sunrise to sunset, increasing the output by about 20%.  Power is being sold to Tucson Electric Power in a 20-year power purchase agreement.

NRG Energy: NRG Energy, Inc. is a large American energy company, dual-headquartered in West Windsor Township, New Jersey, and Houston, Texas.  It was formerly the wholesale arm of Xcel Energy, and was spun off in bankruptcy in 2004.

Point Aconi Generating Station: The Point Aconi Generating Station is a 165 MW Canadian electrical generating station located in the community of Point Aconi, Nova Scotia, a rural community in the Cape Breton Regional Municipality.  A thermal generating station, the Point Aconi Generating Station is owned and operated by Nova Scotia Power Corporation.  It opened on August 13, 1994 following four years of construction.

Sir Adam Beck Hydroelectric Generating Stations: Sir Adam Beck Hydroelectric Generating Stations are two hydroelectric generating stations in Niagara Falls, Ontario, Canada.  Sir Adam Beck Generating Station I, Sir Adam Beck Generating Station II and the Sir Adam Beck Pump Generating Station are all owned by Ontario Power Generation.  Following the development of several smaller generating stations around Niagara Falls in the late 19th and early 20th centuries, the Province of Ontario authorized the construction of first major publicly owned generating station in the province.  At the time it was built, it was the largest hydroelectric generating station in the world.

Annapolis Royal Generating Station: The Annapolis Royal Generating Station is a 20 MW tidal power station located on the Annapolis River immediately upstream from the town of Annapolis Royal, Nova Scotia, Canada.  It is the only tidal generating station in North America.  The generating station harnesses the tidal difference created by the large tides in the Annapolis Basin, a sub-basin of the Bay of Fundy.  Opened in 1984, the Annapolis Royal Generating Station was constructed by Nova Scotia Power Corporation, which was, at the time, a provincial government Crown corporation that was frequently used to socially benefit various areas in the province.

Amonix: Amonix, Inc. is a solar power system developer based in Seal Beach, California.  The company manufactures concentrator photovoltaic (CPV) products designed for installation in sunny and dry climates.  CPV products convert sunlight into electrical energy in the same way that conventional solar photovoltaic technology does, except that they use optics to focus the solar radiation before the light is absorbed by solar cells.  According to a comparative study of energy production of solar technologies, CPV systems require no water for energy production and produce more energy per megawatt (MW) installed than traditional PV systems.  Amonix has nearly 70 Megawatts(DC) of CPV solar power systems deployed globally, including Southwestern U.S. and Spain.  In May 2012, the Alamosa Solar Generating project, owned and operated by Cogentrix Energy, began commercial operation.  This is the largest CPV power plant in the world and is expected to produce enough clean renewable energy per year to power more than 6,500 homes and will avoid the emissions of over 43,000 metric tons of carbon dioxide per year.  The Alamosa Solar Generating Project is supported by a power purchase agreement (PPA), which is a long-term agreement to sell the power it will generate.  Under the project’s PPA, the Public Service Company of Colorado will buy the power generated by the solar facility for the next 20 years.  In July 2012, Amonix set the world record for photovoltaic module efficiency at 33.5% (full regression analysis) under nominal operating conditions, verified by the National Renewable Energy Laboratory.  In April 2013, Amonix broke the record set in July 2012, demonstrating photovoltaic module efficiency at 34.9% (full regression analysis) under normal concentrator standard operating conditions (CSOC), also verified by the National Renewable Energy Laboratory.  In August 2013, Amonix announced it had achieved a 35.9% photovoltaic module efficiency rating under concentrator standard test conditions (CSTC) as calculated by NREL.  In June, 2014, the assets of Amonix were acquired by Arzon Solar, LLC for the purpose of continued development of CPV technology and products.

Brawley Wash: Brawley Wash is an ephemeral stream, tributary to the Santa Cruz River, located in Pima County.  Its source is in the Altar Valley between the Sierrita and Coyote Mountains at , at the confluence of the Altar and Alambre washes along Arizona State Route 286.  It flows north-north east through the Altar Valley and turns north as it enters Avra Valley near Robles Junction (also known as Three Points) where Arizona State Route 86 crosses the streambed.  The wash traverses the Avra Valley between the Roskruge Mountains and the Tucson Mountains.  It joins the Santa Cruz east of the Samaniego Hills of the Silver Bell Mountains.  The wash is known as the Los Robles Wash near its junction with the Santa Cruz approximately six miles west of Avra and Interstate 10.

Miami Fort Power Station: The Miami Fort Generating Station, like another Ohio station (Beckjord Generating Station) is a dual-fuel power generating facility.  It is a major coal-fired electrical power station, supplemented with a small oil-fired facility.  Miami Fort is located two miles east of Lawrenceburg, Indiana, immediately north-east of the tripoint of Indiana, Ohio, and Kentucky, on the Ohio territory.  Miami Fort Station is named for the nearby Miami Fort (not to be confused with Fort Miami in the same state).  Miami Fort Generating Station is one of the two coal power plants near Lawrenceburg, Indiana, the other being Tanner's Creek Generating Station.

Supporting paragraphs: Avra Valley Solar Generating Station NRG Energy
Answer: West Windsor Township, New Jersey, and Houston, Texas