| 27271 | Switzerland | Frey Electric AG | Kantonstrasse 39, 6234 Triengen | +41 933 1414 | www.freyelectric.ch | | |
| 27272 | Switzerland | Fuchs Solar | Hauptstrasse 13, 9515 Hosenruck TG | +41 71 9402092 | www.fuchssolar.ch | | |
| 27273 | Switzerland | Fürer Holzbau AG | Unterer Landberg 1122, 9230 Flawil | +41 71 3932929 | www.fuerer-holzbau.ch | | |
| 27274 | Switzerland | Furrer Solartechnik GmbH | Langackerstrasse 5, 6330 Cham ZG | +41 41 7802507 | www.furrer-solartechnik.ch | | |
| 27275 | Switzerland | Fyrosol AG | Güetli 191, 9428 Walzenhausen | +41 71 8800012 | www.fyrosol.ch | | |
| 27276 | Switzerland | G&O sunsolutions GmbH | Gewerbepark 11, 9615 Dietfurt | +41 71 9313141 | sunsolutions.ch | | |
| 27277 | Switzerland | Gall Elektro AG | Marktstrasse 13, 8890, Flums | +41 81 7334592 | www.gall-elektro.ch | | |
| 27278 | Switzerland | Gasser + Bertschy Elektro AG | Morgenstrasse 128, CH-3018 Bern | +41 31 3501177 | https://www.gb-ag.ch | | |
| 27279 | Switzerland | GBH-Gebäudehüllen AG | Colombstrasse 28, 3027, Bern | +41 31 9811414 | gbh-bern.ch | | |
| 27280 | Switzerland | Gebr. Willi Elektro AG | Oberdorfstrasse 6, 9562 Buch b. Märwil | +41 71 6551515 | https://www.willi-elektro.ch | | |
| 27281 | Switzerland | Gebrüder Brand AG | Bahnhofstrasse 24, 4900, Langenthal | +41 62 9221233 | www.brand-haustechnik.ch | | |
| 27282 | Switzerland | GEFCO | | | https://ch.gefco.net | | |
| 27283 | Switzerland | Gemeindewerke Erstfeld | Gotthardstrasse 101, CH-6472, Erstfeld | +41 882 0010 | www.gemeindewerke-erstfeld.ch | | |
| 27284 | Switzerland | Generation of Solar | Werkweg 3, 3296 Arch | +41 76 8181839 | www.generationofsolar.ch | | |
| 27285 | Switzerland | Genos Energie AG | Industriestrasse 10, 4573, Lohn-Ammannsegg | +41 32 5587281 | www.genos.ch | | |
| 27286 | Switzerland | Georg Egli AG | Hauptstrass 6, 7240, Küblis | +41 81 3003000 | https://www.georg-egli.ch | | |
| 27287 | Switzerland | Gerber Holzbau Bern AG | Bottigenstrasse 217, 3019 Bern-Oberbottigen | +41 31 9262016 | www.gerber-holzbau.ch | | |
| 27288 | Switzerland | GGS AG | Chapfweg 4, CH-4460 Gelterkinden | +41 61 9859955 | www.ggs-holzbau.ch | | |
| 27289 | Switzerland | GLB Cooperative | Bahnhofstrasse 27, 3550 Langnau i.E | +41 34 4081717 | www.glb.ch | | |
| 27290 | Switzerland | Gloor + Baumann Holzbau AG | Birrwilerstrasse 7, 5725 Leutwil | +41 62 7771087 | www.gloor-baumann.ch | | |
| 27291 | Switzerland | Gmür Dach + Wand GmbH | Rorschacherstrasse 412, CH-9402, Mörschwil | +41 71 8700166 | www.gh-gmuer.ch | | |
| 27292 | Switzerland | Go Solar GmbH | Lindenhofstrasse 6, CH-8180 Bülach | +44 862 0444 | www.solarenergy-shop.ch | Morningstar Corporation, SMA Solar Technology AG, Steca Elektronik GmbH, Studer Innotec, Delta Energy Systems (Germany) GmbH | Morningstar Corporation, OutBack Power, Steca Elektronik GmbH, Phocos AG |
| 27293 | Switzerland | Goldenberger Elektro AG | Hauptstrasse 203, 5044, Schlossrued | +41 62 7391020 | www.goldenberger.ch | | SunPower Corp., JA Solar Holdings Co., Ltd., Kyocera Corporation |
| 27294 | Switzerland | Gort Solar GmbH | St. Leonhardstrasse 1b, 7310 Bad Ragaz | +41 78 7370918 | www.gortsolar.ch | | |
| 27295 | Switzerland | Graf AG | Schlossergasse 3, 6247 Schötz | +41 41 9801334 | www.grafhaustechnik.ch | | |
| 27296 | Switzerland | Graf + Magnenat AG | Murtenstrasse 17, Postfach 39, 3177 Laupen | +41 31 7478452 | www.grafsanitaer.ch | | |
| 27297 | Switzerland | Grau Electricité SA | Rue de l'Industrie 8, 1870 Monthey | +41 24 4718080 | www.grau-electricite.ch | | |
| 27298 | Switzerland | Greenkey Sagl | Via Ceresio 45, CH-6963, Pregassona | +41 78 6045455 | www.greenkey.ch | | |
| 27299 | Switzerland | Greentec Lupatini | | +41 791061921 | www.greentecsolar.ch | | |
| 27300 | Switzerland | Grigoloinstal | Dorfstrasse 5, 7436 Medels im Rheinwald, Splügen | +41 79 5585590 | www.grigoloinstal.ch | | |