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Solar thermochemical hydrogen production
Solar thermochemical hydrogen production (STCH, also called solar thermal water splitting) makes hydrogen with heat from concentrated sunlight, cycling metal oxides between reduction and steam re-oxidation to split water.
Solar thermophotovoltaic system
A solar thermophotovoltaic (STPV) system converts sunlight to electricity via a heated intermediate emitter, whose thermal radiation a photovoltaic cell converts, reshaping the spectrum to cut losses.
Solar tracker
A solar tracker is a mounting system that orients PV panels toward the sun as it moves, increasing energy yield by up to 27 percent over fixed arrays.
Solar Two
Solar Two was a 10-megawatt experimental solar power tower plant east of Barstow, California, that operated from 1996 to 1999 using molten nitrate salt for heat storage.
Solar water disinfection
Solar water disinfection (SODIS) is a household water treatment method in which contaminated water in transparent PET bottles is exposed to sunlight for at least 6 hours, inactivating pathogens.
Solar water disinfection system
A solar water disinfection system uses sunlight to inactivate drinking water pathogens through ultraviolet radiation, heat, or both, in regions without reliable treated water supplies.
Solar water heating
Solar water heating (SWH), also called a solar hot water system, uses solar thermal collectors to heat water for domestic, pool, or industrial use, usually with a storage tank and backup heater.
Solar-powered desalination unit
A solar-powered desalination unit is a water-treatment system that uses heat or photovoltaic electricity from sunlight to remove salt from seawater or brackish water, producing fresh water off-grid.
SolarCity
SolarCity was an American solar energy company founded in 2006 by brothers Lyndon and Peter Rive; it pioneered solar leasing and was acquired by Tesla in 2016.
SolarEdge Technologies
SolarEdge Technologies is an Israeli smart energy company founded in Herzliya in 2006 that makes DC-optimized solar inverters, power optimizers, batteries, and EV chargers, shipped to 145 countries.
Solarex
Solarex was an American photovoltaic manufacturer founded in Rockville, Maryland in 1973 by former COMSAT engineers Joseph Lindmayer and Peter Varadi, absorbed into BP Solar in 1999.
Solaris
Solaris is an AI interface world model announced by Runway on August 31, 2026, which generates interactive apps and websites directly as video, frame by frame, rather than code.
Solaris Bus & Coach
Solaris Bus & Coach is a Polish bus and trolleybus manufacturer based in Bolechowo near Poznań, founded in 1996 and owned by Spain's CAF group since 2018.
Solaris Energy Infrastructure
Solaris Energy Infrastructure is a Houston, Texas company, founded in 2014 and traded on the NYSE as SEI, that provides mobile power generation and oilfield logistics equipment.
SolarPower Europe
SolarPower Europe, formerly the European Photovoltaic Industry Association, is a Brussels-based trade association with more than 300 members, founded in 1985 and renamed in 2015.
SolarSquare
SolarSquare is a Mumbai-headquartered residential rooftop solar company founded in 2015 by Shreya Mishra, Neeraj Jain, and Nikhil Nahar, serving nearly 50,000 homes across 29 Indian cities.
SolarWinds
SolarWinds is a Delaware-incorporated IT management and observability software company with over 300,000 customers, whose Orion Platform was the target of the 2020 SUNBURST supply-chain breach.
SolarWinds hack
The SolarWinds hack was a software supply-chain attack disclosed in December 2020, in which a backdoor in Orion updates reached US federal agencies and about 100 companies.
SolarWorld
SolarWorld AG was a German photovoltaic manufacturer headquartered in Bonn, founded in 1998, that led trade complaints against Chinese panel imports and filed for insolvency in 2017.
SOLAS Convention
The SOLAS Convention (Safety of Life at Sea) is the international treaty setting minimum safety standards for merchant ships, adopted in 1974 and administered by the IMO.
Solatio Energia
Solatio Energia is a Spanish developer and investor in large-scale photovoltaic power plants that has operated in Brazil since around 2009, with over 20 GWp of projects developed and a green hydrogen venture in Piauí.
Solder
Solder is a fusible metal alloy, usually tin-based, melted below 450 °C to join metals without melting them; the eutectic 63Sn-37Pb alloy was long standard in electronics.
Solder joint fatigue
Solder joint fatigue is the mechanical degradation of solder joints that connect chips to circuit boards, caused by repeated thermal expansion cycles and often limiting a device's long-term reliability.
Solder paste
Solder paste, also called solder cream, is a blend of solder alloy particles and flux, applied to circuit board pads and melted in a reflow oven to form solder joints.
Soldering
Soldering is a group of joining processes that bond materials with a filler metal melting below 450 °C, the temperature above which the same process is called brazing.
Soldering iron
A soldering iron is a hand tool that heats a metal tip to melt tin-based solder below 450 °C, joining electronic components without melting the base metal.
Soldier Field
Soldier Field, opened in Chicago in 1924 as Municipal Grant Park Stadium, is a lakefront stadium and memorial best known as home of the Chicago Bears.
Sole gas field
The Sole gas field is a producing natural gas field in the eastern Gippsland Basin off Victoria, Australia, supplying gas to the domestic east coast market.
Solenoid valve
A solenoid valve, also called a magnetic valve, is an electrically operated valve controlling liquid or gas flow using an electromagnet that moves a core.
Solenoid-free plasma startup
Solenoid-free plasma startup is starting and ramping up tokamak plasma current without the central solenoid, a key goal for compact spherical tokamaks with little central space.