| P.S. Services | Anaheim, California | Visit site |
| P.S.P. Specialties Public Company Limited | Mueang Samut Sakhon, Samut Sakhon | Visit site |
| P2S | Long Beach, California | Visit site |
| P3C Technology and Solutions Pvt Ltd | Narnaul, Haryana | Visit site |
| PA Consulting | London, England | Visit site |
| PAC Group | Ballymena, Northern Ireland | Visit site |
| PAR Electrical Contractors, LLC | Kansas City, Missouri | Visit site |
| PBS Engineers, Inc. | San Dimas, California | Visit site |
| PCE Power | Blountville, Tennessee | Visit site |
| PDL Group | Hexham, England | Visit site |
| PDS Engineering & Construction | Bloomfield, Connecticut | Visit site |
| PE Solar | Phoenix, Arizona | Visit site |
| PE Teknik & Arkitektur | Stockholm, Stockholm | Visit site |
| PEACOCK CONSTRUCTION | Lafayette, California | Visit site |
| PEAK Wind | Aarhus, Central Denmark | Visit site |
| PEI Global Partners | Tampa, Florida | Visit site |
| PEMA | Brussels, Brussels-Capital | Visit site |
| PENNANT | · | Visit site |
| PERI | Weißenhorn, Bavaria | Visit site |
| PES Engineers | Atlanta, Georgia | Visit site |
| PES Group | Rosignano Marittimo, Livorno | Visit site |
| PETRONAS | Kuala Lumpur, Kuala Lumpur | Visit site |
| PGE Polska Grupa Energetyczna | Warszawa, Masovian Voivodeship | Visit site |
| PGL Environmental Consultants | Vancouver, British Columbia | Visit site |
| PH Mechanical Corp. | Canton, Massachusetts | Visit site |
| PHONO Solar | Costa Mesa, California | Visit site |
| PIL PERU - Servicios de Ingeniería | Lima, Lima Province | Visit site |
| PIMEW – Polish Offshore Wind Industry Chamber | Gdynia, Pomeranian Voivodeship | Visit site |
| PINNACLE ENERGY | Montagny-près-Yverdon, Vaud | Visit site |
| PIONIERKRAFT | München, Bavaria | Visit site |
| PIZZAROTTI SA | · | Visit site |
| PKR Offshore Co., Ltd | 汐止區, New Taipei City | Visit site |
| PLEMCo | Santa Ana, California | Visit site |
| PLP | Cleveland, Ohio | Visit site |
| PMT | Stadtsteinach, Bavaria | Visit site |
| PN Junction Semiconductor CO. LTD | Windy Hills, Kentucky | Visit site |
| PNG Solar | 嘉義市, Chiayi City | Visit site |
| PORR Polska | Warszawa, Masovian Voivodeship | Visit site |
| POWER Engineers | Hailey, Idaho | Visit site |
| POWER TREE | Hassan, Karnataka | Visit site |
| POWEROAD ENERGY STORAGE | Xiamen Shi, Fujian | Visit site |
| POWESCO | Boulogne-Billancourt, Hauts-de-Seine | Visit site |
| PPAM Solkraft | Ljungsbro, Östergötland | Visit site |
| PPC Partners Inc. | New Berlin, Wisconsin | Visit site |
| PPC S.A. | Brisbane, Queensland | Visit site |
| PR Power Engineers Pvt Ltd | Chennai, Tamil Nadu | Visit site |
| PRACSIS | Auderghem, Brussels-Capital | Visit site |
| PRASARANA MALAYSIA BERHAD | Petaling Jaya, Selangor | Visit site |
| PREFABBRICATI GUERRINI SRL | Santhià, Vercelli | Visit site |
| PROINSO Award-Winning Services for Solar Energy Projects | Windsor, England | Visit site |
| PROPOINT | Gliwice, Silesian Voivodeship | Visit site |
| PROPWR | Midland, Texas | Visit site |
| PROSTER | Brzesko, Lesser Poland Voivodeship | Visit site |
| PROWATT | Adapazarı, Sakarya | Visit site |
| PRUiM SA - GLIWICE | Gliwice, Silesian Voivodeship | Visit site |
| PSA International | Singapore, South West Community Development Council | Visit site |
| PSC Solar UK | Kirkland, Washington | Visit site |
| PSEG | Newark, New Jersey | Visit site |
| PSP Dynamic | Bharatpur, Rajasthan | Visit site |
| PSP Investments | Investissements PSP | Montréal, Quebec | Visit site |
| PSP Projects Limited | Ahmedabad, Gujarat | Visit site |
| PT BINTAN CELLULAR INDONESIA | 宜宾市, 四川省 | Visit site |
| PT CTCI INTERNATIONAL INDONESIA | Jakarta, Jakarta | Visit site |
| PT Datang DSSP Power Indonesia | Akole, Maharashtra | Visit site |
| PT Gree Electric Appliances Indonesia | Jakarta Utara, Jakarta | Visit site |
| PT Penjaminan Infrastruktur Indonesia (Persero) | Jakarta, Jakarta | Visit site |
| PT Sarana Multi Infrastruktur (Persero) | Jakarta, Jakarta | Visit site |
| PT Shenhua Guohua Pembangkitan Jawa Bali | Serang, Banten | · |
| PT&I | Sydney, New South Wales | Visit site |
| PT(Xiamen)New Energy Co.,Ltd | Xiamen Shi, Fujian | Visit site |
| PT. Nusa Solar Indonesia | Batam, Riau Islands | Visit site |
| PT. Pantja Putra Mashindo | Bekasi, West Java | Visit site |
| PT. Surveyor Indonesia (Persero) | Jakarta Selatan, Jakarta | Visit site |
| PT. VOKSEL ELECTRIC Tbk | Ciamis, West Java | Visit site |
| PT. Wedosolar Indonesia | Tangerang Selatan, Banten | Visit site |
| PTI Transformers | Regina, Saskatchewan | Visit site |
| PTM Solar | East Syracuse, New York | Visit site |
| PTW Energy Services | Rocky View County, Alberta | Visit site |
| PUREPOWER Engineering SA | Rosenheim, Bavaria | Visit site |
| PV Circonomy | California | Visit site |
| PV Hardware LLC | · | Visit site |
| PV Labels Inc. | Santa Ana, California | Visit site |
| PV Letters | Juneau, Alaska | Visit site |
| PV Mounts | Xiamen Shi, Fujian | Visit site |
| PV Partner | Altınekin, Konya | Visit site |
| PV Racking | Southampton, Pennsylvania | Visit site |
| PV Solutions Inc. | Cebu City, Cebu City | Visit site |
| PVFarm | Newport Beach, California | Visit site |
| PVMAINT | Ilio, Attica | Visit site |
| PVMars Solar | Fuoshan Shi, Guangdong | Visit site |
| PVblink | Kalol Gandhinagar, Gujarat | Visit site |
| PVcase | Kaunas, Kaunas | Visit site |
| PVinsight Inc. | Irving, Texas | Visit site |
| PWRstation | Lausanne, Vaud | · |
| PZSE Structural Engineers, Inc. | Roseville, California | Visit site |
| Paces | New York City, New York | Visit site |
| Pacific Gas and Electric Company | Oakland, California | Visit site |
| Pacific Northwest National Laboratory | Richland, Washington | Visit site |
| Pacific Ropes | Burnaby, British Columbia | Visit site |
| Pacific Sun Solar | Melbourne, Victoria | Visit site |
| Pahal Solar Private Limited | Surat, Gujarat | Visit site |
| Paharpur Cooling Towers | Kolkata, West Bengal | Visit site |
| Paige Renewable Energy | Raleigh, North Carolina | Visit site |
| Palladio Partners | Frankfurt am Main, Hesse | Visit site |
| Palladium: Make It Possible | Washington, District of Columbia | Visit site |
| Pallidus, Inc. | Albany, New York | Visit site |
| Palomar Technologies | Carlsbad, California | Visit site |
| Pampa Energia | Buenos Aires, Buenos Aires | Visit site |
| Panda Solar | Dhaurahara, Uttar Pradesh | Visit site |
| Pandell | Calgary, Alberta | Visit site |
| Panduit | Tinley Park, Illinois | Visit site |
| PanelClaw | North Andover, Massachusetts | Visit site |
| Panelflex - Custom Control Panel Manufacturer | Calgary, Alberta | Visit site |
| Panelmatic, Inc. | Houston, Texas | Visit site |
| Panhandle Power Solutions | Destin, Florida | Visit site |
| Pano AI | San Francisco, California | Visit site |
| Pantegra Ingenieure GmbH | Neu-Isenburg, Hesse | Visit site |
| Paradigm Power Delivery, Inc. | Moorhead, Minnesota | Visit site |
| Paramount Wires & Cables | New Delhi, Delhi | Visit site |
| Parasol Structures | Scarsdale, New York | Visit site |
| Parkwind | Leuven, Flemish Brabant | Visit site |
| Parlym | Marseille, Bouches-du-Rhône | Visit site |
| Particip GmbH | Freiburg im Breisgau, Baden-Württemberg | Visit site |
| Partner Engineering & Science, Inc. | Torrance, California | Visit site |
| Pason | Calgary, Alberta | Visit site |
| Patch | San Francisco, California | Visit site |
| Patil Automation Ltd. | Chakan, Maharashtra | Visit site |
| Patras Science Park ( Επιστημονικό Πάρκο Πατρών) | Patra, West Greece | Visit site |
| Pattern New Energy | San Francisco, California | Visit site |
| Peaceinvest | Genève, Geneva | Visit site |
| Pear VC | Menlo Park, California | Visit site |
| Pearce Services | Paso Robles, California | Visit site |
| Pearl Street Technologies | Pittsburgh, Pennsylvania | Visit site |
| Pecso | Abu Dhabi, Abu Dhabi | Visit site |
| Pedal Steel Solar | Trumann, Arkansas | Visit site |
| Pegasus | Richmond, California | Visit site |
| Pekintaş Construction | Şişli, Istanbul | Visit site |
| Penfolds Roofing & Solar | Coquitlam, British Columbia | Visit site |
| Penn Fusion Engineering LLC | Lansdale, Pennsylvania | Visit site |
| Pennsylvania Transformer Technology LLC (PTT) | Canonsburg, Pennsylvania | Visit site |
| Penspen | London, England | Visit site |
| Pentas Flora | Kuala Lumpur, Kuala Lumpur | Visit site |
| Per Sé Group | Chicago, Illinois | Visit site |
| Percheron, LLC | Katy, Texas | Visit site |
| Perfection Architectural Systems | Orlando, Florida | Visit site |
| Perfection Électrique | Saint-Léonard, Quebec | Visit site |
| Performance Contractors | Baton Rouge, Louisiana | Visit site |
| Performance Plumbing & Heating, Women Owned (WBE) | Medway, Massachusetts | Visit site |
| Perimeter Solutions Group- Energy Division | Dallas/Fort Worth, TX | Visit site |
| PeroNova | Lee Vining, California | Visit site |