Mae Llywodraeth Cymru wedi galw'n gyson ar Lywodraeth y DU ac Ofgem i gyflwyno tariff cymdeithasol er mwyn diogelu’r deiliad tai mwyaf agored i niwed, a chafwyd cefnogaeth eang dros y syniad hwn ymhlith cyflenwyr ynni.
Welsh Government has consistently called on the UK Government and Ofgem to introduce a social tariff to protect the most vulnerable householders and there was broad support for this from energy suppliers.