| 13801 | Italy | Cieffe Impianti | Via Monsignor Andrea Romano, 18, 25010 San Zeno Naviglio, BS | +39 030 2160672 | www.cieffe-impianti.it | SMA Solar Technology AG, Fimer S.p.A. | |
| 13802 | Italy | Ciel Plants Srl | Via Fratelli Savoia, 14, 33033, Codroipo, UD | +39 0432 1900125 | www.ciel.it | | |
| 13803 | Italy | Ciem Srl | Via di Scandicci Alto, 28, 50018 Scandicci (Fi) | +39 055 256252 | www.ciem-impianti.it | | |
| 13804 | Italy | Costruzioni Impianti Elettrici Meridionali Srl | Via G. Carducci, 12, 74022, Fragagnano (TA) | +39 0831 899055 | www.ciemsrl.it | | |
| 13805 | Italy | CIEP snc | Str. Delle Fratte, 3-b/6, 06132, Perugia PG | +39 075 5287754 | www.ciepimpianti.it | | |
| 13806 | Italy | Cierre Costruzioni S.r.l. | Via Giordano, 51, 86090 Castelpetroso Isernia (IS) | +39 0865 936211 | www.cierrecostruzioni.it | | |
| 13807 | Italy | CiF group Cimino ING. Francesco | Zona Industriale sett. 4, 87064 Corigliano Calabro (Cs), Calabria | +39 0983 851184 | www.cifimpianti.it | SMA Solar Technology AG, Fronius International GmbH, Shenzhen Sofar Solar Co., Ltd., Zucchetti Centro Sistemi S.p.A | |
| 13808 | Italy | Cit Impianti sas | viale Lombardia, 61, 21053 - Castellanza (Va) | +39 0331 502962 | www.citimpianti.com | | |
| 13809 | Italy | CITAB Soc. Coop a r.l. | Gaglianico, Biella, Piemonte | +39 015 5821001 | www.citab.it | | |
| 13810 | Italy | CityPower s.r.l. | Via Roma 44-46, 73042 Casarano LE | +39 0833 512293 | www.citypower.it | LG Chem, Zucchetti Centro Sistemi S.p.A | |
| 13811 | Italy | CL Energia | Via Giorgio Stephenson, 32, 20019 Settimo Milanese | +39 02 33502272 | https://www.clenergia.eu | | |
| 13812 | Italy | Clean Energies scrl | Via L.Montuori, 5 - 00154 Roma | +39 06 92948745 | www.cleanenergies.it | | |
| 13813 | Italy | Clera Group | loc. Matoni, 1 38074 Dro (TN) | +39 0464 504603 | www.cleragroup.it | REC Group, SunPower Corp., Mitsubishi Electric Corporation | |
| 13814 | Italy | CLF Italia srl | 6, Via E. Fermi, 24066, Pedrengo (BG) | +39 035 583251 | https://www.smaltimentoamianto-clfitalia.it | | |
| 13815 | Italy | Clim4Lab s.n.c. | Via Montecarlo, 50, 86039 Termoli CB | +39 0875 84243 | www.clim4lab.com | | |
| 13816 | Italy | Clima Control S.n.c. | Via Tramontani, 15, Ponte San Giovanni, Perugia | +39 075 395523 | www.climacontrolsnc.it | | |
| 13817 | Italy | Clima Planet | Via Tosco Romagnola, 129 56021 Cascina PI | +39 050 711534 | climaplanet.net | SunPower Corp., Mitsubishi Electric Corporation | SMA Solar Technology AG, Fronius International GmbH |
| 13818 | Italy | Clima Service Srl | Via Bergamo 25, 20020 Lainate (MI) | +39 02 93571759 | www.climaservicelainate.eu | | |
| 13819 | Italy | Climacasa | Corso De Gasperi 373, Bari (ba), 70125 | +39 080 5020202 | www.climacasabari.it | | |
| 13820 | Italy | ClimaCenter | Via dei Peuceti 43, 70023, Gioia Del Colle, BA | +39 080 3441368 | clima-center.com | | |
| 13821 | Italy | Climaconfort Srl | V. Terraglio 112, 31022 Preganziol, TV | +39 0422 490883 | www.climaconfort.eu | | |
| 13822 | Italy | Smart Clima Srl | Piazza Carnaro, 28, 00141, Zona Montesacro, Roma | +39 800 904146 | www.climanetonline.it | | |
| 13823 | Italy | Climar 2 S.r.l. | Via San Martino, 43, 25025 Manerbio, BS | +39 030 2593753 | www.climar2.it | | |
| 13824 | Italy | Climart Srl | Via Cattolica, 50, 62012, Civitanova Marche, MC | +39 0733 979142 | www.climartsrl.com | | |
| 13825 | Italy | Climaservice 2000 Srl | Via Tazio Nuvolari, 5, 44020 Gualdo, Ferrara | +39 0532 762373 | www.climaservice.net | | |
| 13826 | Italy | Climaservice Foresi G.＆C. SNC | V. Argine Sinstro, 160, 18100 Imperia | +39 0183 294087 | www.climaserviceimpianti.it | | |
| 13827 | Italy | Climat2000 s.n.c. | Via B. Melzi, 89 20025 Legnano | +39 0331 453504 | www.climat2000.it | | |
| 13828 | Italy | Climatek Srl | Via Edison, 28, 47122 Forlì | +39 0543 721042 | www.climateksrl.it | | |
| 13829 | Italy | Climatel Srl | Via Bergamo, 73, 26100 Cremona | +39 346 0151951 | www.climatel.eu | | |
| 13830 | Italy | Climatronik Impianti Srl | Via Gregorio XI, 97, 00166, Roma, RM | +39 06 6637404 | www.climatronik.com | | |