Below is a list of the companies who attended in 2017.
| 1982 | Empower Energies | NABCEP | Roux Associates |
| 360 Managed Services LLC | Energy Power Partners | Namaste Solar | RPCS |
| 360 Managed Solutions | EnterSolar LLC. | National Grid | Russ Nelson Electric |
| 3C Drilling LLC | Fair Horizon Capital | National Renewable Energy Labo | Schwerd Consulting |
| AEE Solar | First Solar Inc. | New Energy Equity | Seminole Financial Services |
| Aerotek Inc. | GAF Materials LLC | New York Power Authority | SEPA |
| AIRCORE | GameChange Solar | Nine Fasteners Inc. | SMA America LLC |
| Allied Building Products Corp. | GEI Consultants | Nixon Peabody LLP | Smart Electric Power Alliance |
| AlsoEnergy Inc. | GeoOp.com | No Company Yet | Sol Systems LLC |
| Alstom | Geronimo Energy | North Sky Capital | Solar Data Systems Inc. |
| Ames Corporation | GES Developers | NRG | Solar Energy Industries Associ |
| AVANA Capital | GoldenSet Capital | NY-BEST | Solar Liberty Energy Systems |
| BASF | Goldman Sachs | NYC Mayor s Office | solectria renewables llc |
| BDO | GPRS Inc. | NYSERDA | Solitude Solar LLC |
| BlueWave Capital LLC | Green Street Solar Power LLC | OMCO Solar | Sollega |
| Boviet Solar USA | Greenwood Energy | Onsite Companies | Source Renewables LLC |
| Canadian Solar USA Inc. | Hanwha Q CELLS America Inc. | Panasonic | SSIGMA |
| CED Greentech | Hodgson Russ LLP | Partner Engineering & Science | Sun Hunter |
| Chint Power Systems America Co | Hudson Renewables | Paruolo Electric Inc. | Sunpower by Venture Solar |
| City University of New York | Hynes Industries | Pfister Energy Inc. | SunSavvy Energy Group LLC |
| CleanChoice Energy | Infiniti Energy Services LLC | Pierce Atwood | SUNY Stony Brook |
| Cleantech Power Solutions | Institute for Building Technol | Piper Maddox | Sustainable Energy Advantage |
| CleanView Capital | Intersolar | Polar Racking | Tectonic |
| CNG Solar Engineering | Intertek | Porzio Bromberg & NewmanP.C. | Tenaska |
| Coastline Ltd | JP Morgan | Positive Energy NY LLC | TerraGen Solar |
| CohnReznick LLP | Karbone | PowerHub | TerraSmart |
| Con Edison | Korn Ferry | Pravco Inc. | Thew Associates |
| Consolidated Edison Company of | Lawrence Berkeley National Lab | PSEG Long Island | TRC Companies |
| Conti | LG Electronics U.S.A. | Quest Renewables | ul llc |
| CVE North America Inc. | Live Oak Bank | Quik-Pull Inc. | Vanguard Energy Partners |
| Cypress Creek Renewables | LO3 Energy | RBI Solar Inc | vis solis Inc. |
| DCE Solar | Locus Energy | Reneu Energy | Vote Solar |
| Department of Public Service | Longroad Energy Holdings LLC | Renewable Energy Systems Ameri | Willdan |
| Eagle Electric Engineering | M+W Group | Renewable NRG Systems | Yaskawa-Solectria Solar |
| EagleView | Miller Brothers Solar | Reserve Energy Exploration Com | Young/Sommer LLC |
| EDF Renewable Energy | Mitsubishi Electric | Rodman CPAs | |
| Edison Energy | Mitsubishi Electric Power Prod | Roof Tech Inc. |