IATSO (Innovación en alta tecnologia solar) | Spain | 
|
ICOS Vision Systems | Belgium | 
|
IEA PVPS | Switzerland | 
|
IfG - Institute for Scientific Instruments | Germany |  | IKS Photovoltaik Kunsch & Schröde | Germany | 
|
IMA Automation Berlin | Germany |  | IMEC | Belgium | 
|
IMPAC Infrared | Germany |  | INABATA UK | United Kingdom | 
|
Indium | USA | 
|
IndoSolar | India |  |
Inductotherm Europe | United Kingdom |
| INES – National Institute for Solar Energy | France | 
|
InfraTec | Germany | 
|
Ingeteam | Spain | 
|
InnoLas Systems | Germany | 
|
Institut für Kunststofftech. & recycling | Germany |  | Instituto de Promoción Exterior de Castilla-La Mancha - IPEX | Spain | 
|
Intech Solar | China |  | Intego | Germany | 
|
INTEKPLUS | Korea, Republic of |  | Interfloat | Liechtenstein | 
|
International Solar Energy Research Center Konstanz | Germany | 
|
InterPV Magazine / ExpoSolar | South Korea |  | Intertek | Germany |  | Intevac Photonics | USA |  | Invest in Oregon c/o PDC | USA |  | Investment and Marketing Corporation Saxony-Anhalt | Germany |  | IOSS Intelligente optische Sensoren und Systeme | Germany |  | IPR – Intelligente Peripherien für Roboter | Germany |  |
IPT Ionen und Plasmatechnik | Germany |
| IRDEP - EDF Group - CNRS | France |  | ISET - Institute for Solar Energy Technology | Germany |  | Isofotón | Spain | 
|
ISOVOLTA | Austria | 
|
ISRA SURFACE VISION | Germany | 
|
Isuzu Glass Deutschland | Germany | 
|
itemic | Germany |  | iTi – Imaging Technology International | United Kingdom |  | IVT Solar | Singapore |  | J.v.G. Thoma | Germany |  | JA SOLAR | China |  | JENOPTIK Automatisierungstechnik | Germany | 
|
Jiangsu Aide Solar Energy Technology | China | 
|
Jiangsu Prefersolar Photovoltaic | China |  | Jiangsu Shunda PV-Tech | China | 
|
Jiangsu Zhongde New Energy | China |  | Jiangxi Risun Solar Energy | China | 
|
Jiangyin Borun New Energy Acience & Technology | China |  | Jinghen Corporation | China |  | JinJing Group | China |  | Jinko Solar Co., Ltd. | China |  | Jonas & Redmann Photovoltaic Production Solutions | Germany | 
|
JP Sercel Associates | USA |  | JRT Photovoltaics | Germany |  | JULI NEW ENERGY | China |  | Jumao Photonics | China | 
|
Jupiter Solar Power Ltd. | India |  | jura-plast | Germany |  | juwi solar | Germany | 
|
K2 Systems | Germany | 
|
KACO new energy | Germany | 
|
Kastilo | Germany |  | Kawasaki Robotics | Germany |  | Kayex | USA | 
|
KD Solar | Korea, Republic of | 
|
Keller Max F. | Germany |  | KENOSISTEC | Italy | 
|
KIOTO Photovoltaics | Austria |  | KITEC microelectronic technologie | Germany | 
|
KLA-Tencor | USA |  | KOEMMERLING CHEMISCHE FABRIK | Germany | 
|
KOENEN Solar | Germany | 
|
Komax | Switzerland | 
|
Konarka Technologies | USA | 
|
KOS | South Korea |  | KOSTAL Industrie Elektrik | Germany | 
|
KOSTAL Solar Electric | Germany | 
|
KPE | Korea, Republic of |  | Kraftwerk-Sonne | Germany |  | Krannich Solar | Germany | 
|
KREMPEL-GROUP | Germany | 
|
Krinner Schraubfundamente | Germany | 
|
Kummer, John P. | Germany |  | Kuraray Europe – Division TROSIFOL | Germany | 
|
KUREHA | Japan | 
|
Kurt J Lesker | United Kingdom | 
|
KYOCERA Fineceramics | Germany | 
|
Lastertec USA, Niederlassung Deutschland | Germany |  | Latitude Solar | Sweden |  | LayTec | Germany |  | LDK Solar High-Tech | China | 
|
LEONI Studer | Switzerland | 
|
LEUTRON Blitz- und Überspannungsschutz | Germany |  | Leybold Optics | Germany | 
|
Ligao (Zhongshan) Electrical Appliance | China |  | Linde Gas | Germany |  | LISEC MASCHINENBAU | Austria |  | LOGITEX Reinstmedientechnik | Germany |  | Logomatic | Germany |  | Lohmann | Germany | 
|
Long Energy | China | 
|
L.O.T.-Oriel | Germany | 
|
Lotus Systems | Germany | 
|
LPKF SolarQuipment | Germany | 
|
LTB Lufttechnik Bayreuth | Germany |  | LTi REEnergy | Germany | 
|
LumaSense Technologies | USA |  | Lumberg Connect | Germany | 
|
Lumera Laser | Germany |  | Luvata | Finland | 
|
Luxor Solar | Germany |  | M-Solv | United Kingdom | 
|
M+W Zander | Germany | 
|
Madico | USA | 
|
MAGE SOLAR GmbH | Germany |  | Mallinckrodt Baker | The Netherlands | 
|
Managess Energy | Germany |  | Manz Automation | Germany | 
|
Marabu | Germany |  |
Masdar PV | Germany |
| Masevon Technology | The Netherlands |  | Mastervolt | The Netherlands | 
|
MCI International | France | 
|
MDI SCHOTT Advanced Processing | Germany |  | Mecasolar | Spain | 
|
Meco Equipment Engineers | The Netherlands |  | Meier Solar Solutions | Germany | 
|
Meikle Automation | Canada |  | Merck | Germany | 
|
Merit Merrell Technologie | Germany |  | Metallkraft | Norway | 
|
Meteocontrol | Germany |  | Meyer Burger Technology | Switzerland | 
|
Microsic | Italy |  | Microsol International | United Arab Emirates | 
|
microtherm Energietechnik | Germany |  | MIJU Solar Engineering | South Korea |  | Mikron Infrared | USA |  | Millennium Communication | Taiwan | 
|
MiniTec Maschinenbau | Germany | 
|
Mitjavila | France |  | Mitsubishi Electric Europe | Germany | 
|
MKS Instruments Deutschland | Germany | 
|
Mondragon Assembly | Spain | 
|
Monocrystal | Russia | 
|
Montech | Switzerland |  | Moser Baer Photo Voltaic | India | 
|
Mössner | Germany |  | M-O-T Mikro- und Oberflächentechnik | Germany | 
|
Motech Industries | Taiwan | 
|
Mounting Systems GmbH | Germany | 
|
MP+L | Germany | 
|
MP-TEC | Germany | 
|
mta automation | Switzerland |  | Multi-Contact Deutschland | Germany | 
|
Multi-lab Quartztec | United Kingdom |  |
|
