Question: What subsidiary of an American automaker, energy storage company, and solar panel manufacturer based in Palo Alto, California, leased  a photovoltaic  cell factory that owned by the state of New York, was built on a remediated brownfield site from a former steel mill ?

Context paragraphs:
Swanson's law: Swanson's law is an observation that the price of solar photovoltaic modules tends to drop 20 percent for every doubling of cumulative shipped volume.  At present rates, costs halve about every 10 years.  The Law is named after Richard Swanson, the founder of SunPower Corporation, a solar panel manufacturer.  Swanson's Law has been compared to Moore's law.  Crystalline silicon photovoltaic cell prices have fallen from $76.67 per watt in 1977 to $0.36 per watt in 2014.  Plotting the module price (in $/Wp) versus time shows a dropping by 10% per year.

Tesla, Inc.: Tesla, Inc. (formerly named Tesla Motors) is an American automaker, energy storage company, and solar panel manufacturer based in Palo Alto, California.  Founded in 2003, the company specializes in electric cars, lithium-ion battery energy storage, and, through their SolarCity subsidiary, residential solar panels.

Yingli: Yingli (), formally Yingli Green Energy Holding Company Limited ( - .  Yingli Green Energy Holding Company Limited (NYSE: YGE), known as "Yingli Solar," is one of the world's leading solar panel manufacturers.  Yingli Green Energy's manufacturing covers the photovoltaic value chain from ingot casting and wafering through solar cell production and solar panel assembly.  Yingli's photovoltaic module capacity is 4 GWs.

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.

Gigafactory 2: The Tesla Gigafactory 2 is a photovoltaic (PV) cell factory, leased by Tesla subsidiary SolarCity in Buffalo, New York.  The factory, owned by the state of New York, was built on a remediated brownfield site from a former steel mill.  Construction on the factory started in 2014 and was completed in 2016–2017.

Sunlight Solar Energy: Sunlight Solar Energy is a national solar power company, headquartered in Bend, Oregon, that specializing in the design, finance, installation, and management of commercial and residential solar electric, solar hot water, solar pool, and radiant floor systems.  Sunlight Solar was founded in 1988 by Paul Israel, a graduate of Temple University and co-founder of the Central Oregon Green and Solar Tour.  The company opened its first location in Redmond, Oregon in 1997 and began installing solar for RV's, solar hot water, and off-grid solar electric systems.  In 2003 the company moved operations to Bend, Oregon where the office's 3.6 Kilowatt photovoltaic system is monitored by Frank Vignola of the University of Oregon Solar Radiation Monitoring Lab which helped the Energy Trust of Oregon and Christopher Dymond of the Oregon Department of Energy calculate performance expectations for solar power production in Central Oregon.  In 2004 a state solar incentive program encouraged the company's expansion of operations to Milford, Connecticut.  In 2006 they became a premier dealer for SunPower photovoltaic panels.  In 2008 Sunlight Solar was awarded Sunpower's "Intelegant" award for excellence.  In 2008 Sunlight Solar won the Central Oregon Builder's Association award for "Sub-Contractor of the Year".  In 2009 the company expanded to Waltham, Massachusetts.  In 2010 the company opened an office in Portland, Oregon.  In 2010 Sunlight Solar partnered with Habitat for Humanity to install 25 photovoltaic systems on new production high performance homes.

Palo Alto Weekly: The Palo Alto Weekly is a weekly community newspaper in Palo Alto in the U.S. state of California.  Owned by Embarcadero Media, it serves Palo Alto, Menlo Park, Atherton, Portola Valley, Stanford, East Palo Alto and Los Altos Hills.

Indosolar: Indosolar Limited is an Indian photovoltaic cell and solar panel manufacturer.  It is the largest PV cell manufacturer in India by capacity.

SolarBridge Technologies: SolarBridge Technologies (SolarBridge) is a provider of solar micro-inverter, solar inverter for photovoltaic arrays.  These types of products aim to increase energy harvest and reliability while reducing the cost of solar installations and maintenance for residential and commercial markets.  The company was acquired by solar panel manufacturer SunPower in autumn of 2014.

Enphase Energy: Enphase Energy is a NASDAQ-listed energy technology company headquartered in Petaluma, California.  Enphase designs and manufactures software-driven home energy solutions that span solar generation, home energy storage and web-based monitoring and control.  Enphase has shipped about ten million solar microinverters, primarily into the residential and commercial markets in North America, Europe and Australia.  Microinverters convert the direct current power from the solar panel (DC) directly into grid-compatible alternating current (AC) for use or export.  Enphase was the first company to successfully commercialise the microinverter on a wide scale, and remains the market leader.

Supporting paragraphs: Gigafactory 2 Tesla, Inc.
Answer: SolarCity