Cyngor ar ynni i gartrefi Gall ein hawgrymiadau ar newid cyflenwyr, grantiau’r llywodraeth, budd-daliadau a chynlluniau effeithlonrwydd ynni eich helpu i arbed arian a bod yn fwy gwyrdd o ran eich defnydd o ynni hefyd.
Y cap ar brisiau ynni Y cap ar brisiau ynni yw'r swm uchaf y gall cyflenwyr ynni ei godi arnoch fesul uned o ynni a thâl sefydlog os ydych chi ar dariff amrywiol safonol.
Cwyno am eich cyflenwr ynni Os ydych yn anfodlon ar wasanaeth cwmni ynni, dilynwch ein canllaw cam wrth gam ar sut i reoli cwyn a'r help y gallwch ei gael ar y ffordd.
Cyngor ar ynni i fusnesau Yma ceir canllawiau ar amrywiaeth o bynciau yn cynnwys y ffordd y mae contractau ynni i fusnesau yn gweithio.
Environmental and social schemes Find out if your home or business can get help with installing a heat pump, insulation or reducing energy bills through one of the schemes we administer.
Mewngofnodi i gofrestr eich cynllun Mewngofnodi i gyfrif eich cynllun amgylcheddol – MyRHI, Cofrestr RHI, y gofrestr Ynni Adnewyddadwy a Gwres a Phŵer Cyfunedig a'r Gofrestr Rhwymedigaeth Cwmnïau Ynni.
Energy policy and regulation See information on the programmes we run, the licences we administer and the decisions we make on the companies and sectors we regulate.
Industry licensing Find licensed energy suppliers, apply for a new energy licence, or make changes to a current licence.
Compliance and enforcement Information on how we monitor company activity and ensure redress or penalty where there is inappropriate behaviour or breach of licence.
Engagement Share your views and have your say in our consultations and calls for input. You can also access a searchable index of all our forums and working groups.
Policy and regulatory programmes Access detailed information on all of the current and historical programmes of work carried out by our policy and regulatory directorates.
Policy and regulatory publications Lists of our policy and regulatory publications arranged by company, licence, sector and industry code.
Ofgem drives forward plans for new and improved smart meter rules New smart meter standards and more compensation for customers facing long wait times for installations or repairs are set to be introduced next year. Cyhoeddwyd: 8 August 2025 Press release
Ofgem reforms rules to shield consumers from cost of supplier failures The Supplier of Last Resort Levy Offset rule will ensure costs claimed by energy companies under the SoLR levy will be the liability of the failed supplier. Cyhoeddwyd: 5 August 2025 Press release
Ofgem announces major review into how costs are allocated across the energy system Our press release on Ofgem's cost allocation review. Cyhoeddwyd: 30 July 2025 Press release
