I gael rhagor o fanylion, ewch i wefanGwerthwchiGymru(mae angen mewngofnodi). Fel arall, e-bostiwch:CaffaelMasnachol.Adeiladau@llyw.cymruCyflenwi ynni a gwasanaethau ategol
For more details, visit theSell2Wales website(login required). Alternatively, please e-mail:CommercialProcurement.Utilities@gov.walesSupply of energy and ancillary services