| Solimpeks | Karatay, Konya | Visit site |
| Solis | Houston, Texas | Visit site |
| Solis-energie by AB | Île-de-France | Visit site |
| Solisart | Sainte-Hélène-du-Lac, Savoie | Visit site |
| Soliswatt | Hangzhou Shi, Zhejiang | Visit site |
| Sollega | San Bruno, California | Visit site |
| Solmax | Varennes, Quebec | Visit site |
| SoloGrid, Inc. | San Ramon, California | · |
| Sologic Solar | Hollister, California | Visit site |
| Solomon Energy | Bridgeport, Connecticut | Visit site |
| Solr Solvr | Orillia, Ontario | Visit site |
| Solra PV | Jerusalem, Jerusalem District | Visit site |
| Solscient Energy | Toledo, Ohio | Visit site |
| Solsonica | Cittaducale, Rieti | Visit site |
| Solstr Innovation LLP | Kupferzell, Baden-Württemberg | Visit site |
| Soltec | Molina de Segura, Murcia | Visit site |
| Soltronergy | Roermond, Limburg | Visit site |
| Solucione Energias Renováveis | Vinhedo, São Paulo | Visit site |
| Soluciones en Energía / Power Rent. renta, venta y mantto. de Plantas de Luz | Mexico | Visit site |
| Soluna | 新屋區, Taoyuan | Visit site |
| Solution Control Systems Inc. | Edmonton, Alberta | Visit site |
| SolutionCX | Provo, Utah | Visit site |
| Solvari | Utrecht, Utrecht | Visit site |
| Solvires | Makati, Makati | Visit site |
| Solvis | Braunschweig, Lower Saxony | Visit site |
| Solvo Global | Duluth, Georgia | Visit site |
| Som Enerji | Ataşehir, Istanbul | Visit site |
| Sonepar USA | North Charleston, South Carolina | Visit site |
| Sonic Industrial Sales | Erie, Pennsylvania | Visit site |
| Sonnen Metal | Warszawa, Masovian Voivodeship | Visit site |
| Sonnenladen GmbH | balkonkraftwerk.de | Bremen, Bremen | Visit site |
| Sonnensysteme AF GmbH | Ottobrunn, Bavaria | Visit site |
| Sonnex Energie | Frankfurt am Main, Hesse | Visit site |
| Sonocharge Energy | Lafayette, California | Visit site |
| Sonovision - Ortec Group | Aix-en-Provence, Bouches-du-Rhône | Visit site |
| Soportes Solares | San Isidro, Alicante | Visit site |
| Soprasolar | Clichy, Hauts-de-Seine | Visit site |
| Sotevity | Pepper Pike, Ohio | Visit site |
| Sound Geo Supply | Cartersville, Georgia | Visit site |
| Sourayan Technologies Pvt. Ltd. | Pune, Maharashtra | Visit site |
| South African Local Government Association | Johannesburg, Gauteng | Visit site |
| South Asia Regional Infrastructure Connectivity (SARIC) | Gurugram, Haryana | Visit site |
| South East Solar Group of Companies | Irmo, South Carolina | Visit site |
| SouthCoast Wind | Boston, Massachusetts | Visit site |
| Southern Company | Atlanta, Georgia | Visit site |
| Southern Exposure Solar | Richmond, Virginia | Visit site |
| Southern Regional Council of Carpenters | Metairie, Louisiana | Visit site |
| Southern States LLC | Hampton, Georgia | Visit site |
| Southwest Research Institute | San Antonio, Texas | Visit site |
| Sova Solar | Rajarhat, West Bengal | Visit site |
| Space Intelligence | Edinburgh, Scotland | Visit site |
| Space Leasing International (SLI) | Washington, District of Columbia | Visit site |
| Spar Power Technologies Inc. | · | Visit site |
| Sparc Fire Protection Engineering, LLC | New York, New York | Visit site |
| Spark Solar | Cleburne, Texas | Visit site |
| Sparkfund | Washington, District of Columbia | Visit site |
| Spartan X | Winter Park, Florida | Visit site |
| Special Cables | Lüneburg, Lower Saxony | Visit site |
| Spectra Solar | Wigan, England | Visit site |
| Spectronik | Singapore, South West Community Development Council | Visit site |
| Speed Team Group | Nemili, Tamil Nadu | Visit site |
| Sphere Technologies Ltd | Illinois | Visit site |
| Spitzer Energy Company | Ontario, California | Visit site |
| Splend Electric | · | Visit site |
| Sprecher Automation | Linz, Upper Austria | Visit site |
| Springers Solar | Brisbane, Queensland | Visit site |
| Spruce Power | Houston, Texas | Visit site |
| Spye | Minneapolis, Minnesota | Visit site |
| Square 4 Solar | Warrington, England | Visit site |
| Square Solar Inc | Vancouver, British Columbia | Visit site |
| Sri Lanka Energy Program | Colombo, Colombo | Visit site |
| St1 Biokraft | Stockholm, Stockholm | Visit site |
| Stabilus | Koblenz, Rhineland-Palatinate | Visit site |
| Stag Solar | Maldon, England | Visit site |
| Standard Power Development | Kraków, Lesser Poland Voivodeship | Visit site |
| Standard Renewable Energy SRE | 壽豐鄉, Hualien County | · |
| Standardkessel Baumgarte GmbH | Mülheim an der Ruhr, North Rhine-Westphalia | Visit site |
| Stantec | Edmonton, Alberta | Visit site |
| Star Solar Specialists | Jeffersonville, Indiana | Visit site |
| Star Solar, Inc | Los Angeles, California | Visit site |
| Stark Energy | Walldorf, Baden-Württemberg | Visit site |
| Starwin Solar | Xiamen Shi, Fujian | Visit site |
| Stat-X® Fire Suppression | Minnetonka, Minnesota | Visit site |
| Statcon Energiaa | Noida, Uttar Pradesh | Visit site |
| Statcon Powtech | Noida, Uttar Pradesh | Visit site |
| Staten Solar | San Jose, California | Visit site |
| Station A | San Francisco, California | Visit site |
| Steel Dynamics, Inc | Fort Wayne, Indiana | Visit site |
| Steel Structures, Inc. | Madera, California | Visit site |
| Stellenergy, LLC | Albuquerque, New Mexico | Visit site |
| Sterile Environment Technologies (SET 3) | Orlando, FL | Visit site |
| Sterlite | New Delhi, Delhi | Visit site |
| SternLicht Energie | Yenişehir, Diyarbakır | Visit site |
| Steven Winter Associates | Norwalk, Connecticut | Visit site |
| Stichting Gelijkspanning Nederland | Aalsmeer, North Holland | Visit site |
| Stiesdal | København, Capital Region of Denmark | Visit site |
| Stockholm Sol | Stockholm, Stockholm | Visit site |
| Stockwell Solar Services Pvt Ltd | Jaipur, Rajasthan | Visit site |
| Storagenergy Technologies | Salt Lake City, Utah | Visit site |
| Storion Energy | Alpharetta, Georgia | Visit site |
| Strategic Economic Research , LLC | Normal, Illinois | Visit site |
| Streamergy | Augsburg, Bavaria | Visit site |
| Street Lighting Poles In Pakistan | Lahore, Punjab | Visit site |
| Stripsteel | Puebla, Puebla | Visit site |
| Strohm | IJmuiden, North Holland | Visit site |
| Strong Hold | Louisville, Kentucky | Visit site |
| Structura Metal | Lenexa, Kansas | Visit site |
| Structurology | Phoenix, Arizona | Visit site |
| Stryten Energy | Alpharetta, Georgia | Visit site |
| Studer Cables AG | Däniken | Visit site |
| Studio Oker | Stavanger, Rogaland | Visit site |
| Subham Enterprise | Dhupguri, West Bengal | Visit site |
| Sublime Systems | Somerville, Massachusetts | Visit site |
| Sud Concept - Solutions Énergies - Photovoltaïque | Vedène, Vaucluse | Visit site |
| Sudarshan CADD Technologies | Branchburg, New Jersey | Visit site |
| Sudhan Solar | Singapore, Central Singapore Community Development Council | Visit site |
| Sugar Hollow Solar, Inc. | Asheville, North Carolina | Visit site |
| Suichoku Solar Co. Ltd. | 横浜市, Kanagawa | Visit site |
| Sulgás | Carlos Gomes, Rio Grande do Sul | Visit site |
| Sumcab | Les Franqueses del Vallès, Barcelona | Visit site |
| Sumitomo Electric | 大阪市, Osaka | Visit site |
| Sun Action Trackers | San Antonio, Texas | Visit site |
| Sun Green Énergies | Mérignac, Gironde | Visit site |
| Sun Integration | Jakarta Pusat, Jakarta | Visit site |
| Sun Light & Power | Berkeley, California | Visit site |
| Sun Max Solar | Sydney, New South Wales | Visit site |
| Sun Pacific Holding Corp | South Plainfield, New Jersey | Visit site |
| Sun Valley Solar Solutions | Chandler, Arizona | Visit site |
| Sun-Age | Balerna, Ticino | Visit site |
| Sun-Nova New Energy | Shanghai, Shanghai | Visit site |
| SunAsia Energy, Inc. | Reliance, South Dakota | Visit site |
| SunBeat Energy | Orlando, Florida | Visit site |
| SunBy Solar Technology Co., Ltd. | Yancheng Shi, Jiangsu | Visit site |
| SunChase Power LLC | Trophy Club, Texas | Visit site |
| SunCoast Land Services, Inc. | Houston, Texas | Visit site |
| SunCrafter GmbH | Berlin, Berlin | Visit site |
| SunFi | Lagos, Lagos | Visit site |
| SunGarner | Noida, Uttar Pradesh | Visit site |
| SunMade Smart Roofing, Solar & Electric | Fresno, California | Visit site |
| SunModo | Vancouver, Washington | Visit site |
| SunPeople- Your local solar experts | Wollongong, New South Wales | Visit site |
| SunSniffer GmbH & Co. KG | Nürnberg, Bavaria | Visit site |
| SunStak | Canberra, Australian Capital Territory | Visit site |
| SunUp America | Phoenix, Arizona | Visit site |
| Sunage | Balerna, Ticino | Visit site |
| Sunanda Solar Energy Pvt Ltd | Bhopal, Madhya Pradesh | Visit site |
| Sunaxer SA | Montreux, Vaud | Visit site |
| Sunbank Energy | Zapopan, Jalisco | Visit site |
| Sunbeam Energy | Surat, Gujarat | Visit site |
| Sunbelt Solomon | Temple, Texas | Visit site |