Cheaper Energy Prices
Wales is being failed by an energy system that still bends over backwards for fossil fuels while households are pushed to the brink. At a time when wind and solar are delivering the cheapest power Britain has ever produced, families here are still forced to pay prices pegged to gas — the most volatile, crisis‑driven fuel on the market. This isn’t just outdated; it’s a political choice that keeps Wales locked into a system designed to protect fossil‑fuel profits instead of people. With bills rising again in 2026 and communities already stretched to breaking point, the case for reform is no longer a debate — it’s an emergency. Wales generates clean power in abundance, yet pays more because the rules are rigged. The Welsh Liberal Democrats demand immediate action to break the grip of gas, unleash the true value of renewables, and deliver a fair, modern energy system worthy of the people it serves.
Power to the People: Wales Deserves a Fair Energy Deal
From January 2026, families in Wales will pay more for electricity than the UK average, burdened by higher unit rates and standing charges. Across Wales, households are still facing punishing bills — even though renewable energy is now cheaper than ever.
Today, the average household pays 25–26 pence per kilowatt hour under Ofgem’s price cap, with annual bills between £1,720 and £1,755. These costs are unsustainable.
The facts are undeniable:
• Large‑scale solar costs around £41 per megawatt hour (MWh).
• Onshore and offshore wind on average £44/MWh.
• Gas generation, by contrast, costs a staggering £114/MWh, on average
Yet Britain’s outdated “marginal pricing” system ties every household to volatile gas prices. The wholesale electricity price is set by the most expensive generator needed to meet demand — almost always gas. Even when renewables supply nearly half of our electricity, bills are dictated by fossil fuels.
Global shocks have made this worse. Russia’s invasion of Ukraine in 2022 sent gas prices soaring, tripling costs and driving UK electricity prices to record highs.
Enough is enough. Wales cannot afford to remain shackled to gas. Political leaders are finally waking up — with proposals to decouple renewables from gas pricing, halve household bills, and accelerate investment in clean power and home insulation.
But change won’t happen without pressure.
We call on government, regulators, and industry to act now:
• Break the link between gas and electricity prices.
• Let renewables set the price of power.
• Invest in clean energy and insulation to protect households.
• Deliver affordable, secure energy for every family in Britain.
This is a turning point. Wales has the power, the technology, and the will to build a fairer energy future. It’s time to break free from gas. It’s time to put people before profits. It’s time to give Wales the fair deal it deserves.
Pŵer i’r Bobl: Mae Cymru’n Haeddu Bargen Egni Deg
O Ionawr 2026 ymlaen, bydd teuluoedd yng Nghymru yn talu mwy am drydan na chyfartaledd y DU, gan wynebu cyfraddau uned uwch a thaliadau sefydlog uwch. Ar draws Cymru, mae aelwydydd yn dal i wynebu biliau cosbol — er bod ynni adnewyddadwy bellach yn rhatach nag erioed.
Heddiw, mae’r aelwyd gyfartalog yn talu 25–26 ceiniog y cilowat-awr o dan gap pris Ofgem, gyda biliau blynyddol rhwng £1,720 a £1,755. Mae’r costau hyn yn anghynaladwy.
Mae’r ffeithiau’n ddiymwad:
• Mae solar ar raddfa fawr yn costio tua £41 y megawat-awr (MWh).
• Gwynt ar y tir ac ar y môr yn costio tua £44/MWh ar gyfartaledd.
• Cynhyrchu nwy, o’i gymharu, yn costio £114/MWh ar gyfartaledd — ffigwr syfrdanol.
Serch hynny, mae system “prisio ymylol” hen ffasiwn Prydain yn clymu pob aelwyd wrth brisiau nwy anwadal. Caiff pris trydan cyfanwerthol ei osod gan y cynhyrchydd drutaf sydd ei angen i fodloni’r galw — bron bob amser yn nwy. Hyd yn oed pan fo adnewyddadwy yn cyflenwi bron hanner ein trydan, mae biliau’n cael eu llywodraethu gan danwydd ffosil.
Mae siociau byd-eang wedi gwaethygu hyn. Anrheithiad Rwsia ar Wcráin yn 2022 wnaeth beri i brisiau nwy saethu i fyny, gan dryblu costau a gwthio prisiau trydan y DU i uchafbwyntiau hanesyddol.
Digon yw digon. Ni all Cymru fforddio aros yn gaeth i nwy. Mae arweinwyr gwleidyddol o’r diwedd yn deffro — gyda chynigion i ddatgysylltu adnewyddadwy oddi wrth brisio nwy, haneru biliau cartref, a chyflymu buddsoddiad mewn pŵer glân ac inswleiddio cartrefi.
Ond ni ddaw newid heb bwysau.
Rydym yn galw ar y llywodraeth, rheoleiddwyr a’r diwydiant i weithredu nawr:
• Torri’r cysylltiad rhwng prisiau nwy a thrydan.
• Caniatáu i adnewyddadwy osod pris trydan.
• Buddsoddi mewn ynni glân ac inswleiddio i ddiogelu aelwydydd.
• Darparu ynni fforddiadwy a diogel i bob teulu ym Mhrydain.
Dyma foment dyngedfennol. Mae gan Gymru y pŵer, y dechnoleg a’r ewyllys i adeiladu dyfodol ynni tegach. Mae’n bryd rhyddhau’n hunain o nwy. Mae’n bryd rhoi pobl o flaen elw. Mae’n bryd rhoi’r fargen deg y mae Cymru’n ei haeddu.
Britain cannot keep paying 21st‑century prices for a 20th‑century energy system. When clean power is now the cheapest electricity in our history, it is indefensible that families are still chained to the cost of gas. We have the technology, the resources, and the responsibility to build a fairer system — one where households finally benefit from the renewable energy they already pay to support. Every gust of wind and every ray of sunlight should be lowering bills — not lining the pockets of gas companies. The British public has done its part by backing clean energy. Now the system must do its part by ensuring that cheap renewable power actually reaches people’s bills. Fairness isn’t radical. It’s common sense. For too long, Britain’s energy market has rewarded the most expensive fuel and punished the people who can least afford it. When renewables are producing nearly half our electricity, it is absurd that gas still dictates the price. Breaking that link isn’t just an economic necessity — it’s a moral one.
Justin Griffiths, lead candidate Sir Gaefyrddin
Powering Carmarthenshire Fairly
A Welsh Liberal Democrat Campaign for Lower Bills, Local Jobs, and Clean Energy
Carmarthenshire Deserves a Fair Energy Deal
Carmarthenshire sits at the heart of a region rich in renewable energy — wind, solar, community power — yet households here still face some of the highest electricity bills in the UK.
The reason is simple:
The UK’s outdated electricity market ties our bills to the price of gas, even when Wales produces large amounts of clean, low‑cost power.
The Welsh Liberal Democrats are fighting to change this.
Why Electricity Bills Are So High
1. Gas sets the price for all electricity
The UK uses a “marginal pricing” system. That means the most expensive generator needed to meet demand — almost always gas — sets the price for every unit of electricity.
Even when renewables supply a large share of power, gas dictates the cost.
2. Global gas volatility hits Welsh households
Gas prices have been unstable for years. When gas spikes, electricity bills rise across Wales — including Carmarthenshire — even though our renewable power is cheap.
3. Local renewable energy doesn’t lower local bills
Wales produces significant renewable electricity, but the national pricing system prevents communities from benefiting directly.
Research shows that other regions generating more electricity — particularly parts of Scotland — are likely to see greater price reductions than Wales under current reforms.
Carmarthenshire’s Renewable Strengths
Our county is part of a nation with:
- Strong onshore wind resources
- Growing solar generation
- Expanding community‑owned energy projects
- A skilled engineering and energy workforce
Yet households here still pay prices tied to fossil fuels.
This mismatch is exactly what the Welsh Liberal Democrats are determined to fix.
What Needs to Change
Experts and energy bodies consistently point to three essential reforms:
1. Reduce the influence of gas on electricity pricing
Decoupling renewables from gas would stabilise bills and reflect the true cost of clean power.
2. Expand long‑term renewable contracts
Contracts for Difference (CfDs) can deliver cheaper, more predictable prices — but only if savings are passed on to consumers.
3. Upgrade the grid
A modern grid would allow more Welsh renewable power to flow into the system and reduce costly constraints.
Our Welsh Liberal Democrat Plan
A fairer energy pricing system
We want households to benefit from Wales’ renewable generation instead of being tied to volatile gas prices.
Major investment in home insulation
Rural and older housing stock across Carmarthenshire loses heat quickly.
Better insulation means lower bills and warmer homes.
Support for community‑owned renewable energy
Local power should create local benefit — keeping more money in Welsh communities.
A modernised grid that unlocks Welsh renewable potential
Carmarthenshire’s clean energy should contribute fully to the UK system, not be held back by outdated infrastructure.
Stronger consumer protections and transparency
Energy companies must pass on savings from cheaper renewable generation.
“Households are being squeezed not because energy is expensive, but because the system is outdated. The price of clean power has fallen dramatically, yet families see none of the benefit. Reform isn’t optional anymore. It’s the only way to deliver affordable, secure energy for every community in Britain.”
Justin Griffiths Lead Candidate, Sir Gaerfyrddin
Carmarthenshire Can Lead the Way
Wales generates clean power — Carmarthenshire should feel the benefit.
The Welsh Liberal Democrats are campaigning for:
- Lower bills for Carmarthenshire families
- A pricing system that reflects the true cost of renewables
- Investment that creates local jobs
- A greener, more secure energy future
Pweru Sir Gaerfyrddin yn Deg
Ymgyrch Democratiaid Rhyddfrydol Cymru ar gyfer Biliau Is, Swyddi Lleol ac Ynni Glân
Mae Sir Gaerfyrddin yn Haeddu Bargen Ynni Deg
Mae Sir Gaerfyrddin yng nghalon ardal sy’n gyfoethog mewn ynni adnewyddadwy — gwynt, solar, ynni cymunedol — ac eto mae cartrefi yma’n dal i wynebu rhai o’r biliau trydan uchaf yn y DU.
Mae’r rheswm yn syml:
Mae marchnad drydan hen ffasiwn y DU yn cysylltu ein biliau â phris nwy, hyd yn oed pan fo Cymru’n cynhyrchu symiau mawr o bŵer glân, rhad.
Mae Democratiaid Rhyddfrydol Cymru yn ymladd i newid hyn.
Pam Mae Biliau Trydan Mor Uchel
1. Nwy sy’n gosod pris yr holl drydan
Mae’r DU yn defnyddio system “prisio ymylol”. Mae hynny’n golygu mai’r cynhyrchydd mwyaf costus sydd ei angen i fodloni’r galw — bron bob amser nwy — sy’n gosod pris pob uned o drydan.
Hyd yn oed pan fo adnewyddadwy yn cyflenwi cyfran fawr o’r pŵer, nwy sy’n penderfynu’r gost.
2. Ansefydlogrwydd byd-eang mewn prisiau nwy yn taro cartrefi Cymru
Mae prisiau nwy wedi bod yn anwadal ers blynyddoedd. Pan fydd pris nwy’n codi, mae biliau trydan yn codi ledled Cymru — gan gynnwys Sir Gaerfyrddin — er bod ein pŵer adnewyddadwy yn rhad.
3. Nid yw ynni adnewyddadwy lleol yn lleihau biliau lleol
Mae Cymru’n cynhyrchu llawer iawn o drydan adnewyddadwy, ond mae’r system brisio genedlaethol yn atal cymunedau rhag elwa’n uniongyrchol.
Mae ymchwil yn dangos bod ardaloedd eraill sy’n cynhyrchu mwy o drydan — yn enwedig rhannau o’r Alban — yn debygol o weld gostyngiadau pris mwy na Chymru o dan y diwygiadau presennol.
Cryfhderau Adnewyddadwy Sir Gaerfyrddin
Mae ein sir yn rhan o genedl sydd â:
- Adnoddau gwynt ar y tir cryf
- Cynhyrchu solar sy’n tyfu
- Prosiectau ynni cymunedol sy’n ehangu
- Gweithlu peirianneg ac ynni medrus
Ac eto mae cartrefi yma’n dal i dalu prisiau sy’n gysylltiedig â thanwydd ffosil.
Mae’r anghysondeb hwn yn union yr hyn y mae Democratiaid Rhyddfrydol Cymru yn benderfynol o’i drwsio.
Beth Sydd Angen Newid
Mae arbenigwyr a chyrff ynni yn gyson yn nodi tri diwygiad hanfodol:
1. Lleihau dylanwad nwy ar brisio trydan
Byddai gwahanu prisio adnewyddadwy oddi wrth nwy yn sefydlogi biliau ac yn adlewyrchu gwir gost pŵer glân.
2. Ehangu contractau adnewyddadwy tymor hir
Gall Contractau am Wahaniaeth (CfDs) ddarparu prisiau rhatach a mwy rhagweladwy — ond dim ond os caiff yr arbedion eu trosglwyddo i ddefnyddwyr.
3. Uwchraddio’r grid
Byddai grid modern yn caniatáu i fwy o bŵer adnewyddadwy Cymreig lifo i’r system ac yn lleihau cyfyngiadau costus.
Ein Cynllun Democratiaid Rhyddfrydol Cymru
System brisio ynni decach
Rydym eisiau i gartrefi elwa o gynhyrchu adnewyddadwy Cymru yn hytrach na chael eu clymu i brisiau nwy anwadal.
Buddsoddiad mawr mewn inswleiddio cartrefi
Mae stoc dai gwledig a hŷn ar draws Sir Gaerfyrddin yn colli gwres yn gyflym.
Mae inswleiddio gwell yn golygu biliau is a chartrefi cynhesach.
Cefnogaeth i ynni adnewyddadwy dan berchnogaeth gymunedol
Dylai pŵer lleol greu budd lleol — gan gadw mwy o arian mewn cymunedau Cymreig.
Grid modern sy’n rhyddhau potensial adnewyddadwy Cymru
Dylai ynni glân Sir Gaerfyrddin gyfrannu’n llawn at system y DU, nid cael ei ddal yn ôl gan seilwaith hen ffasiwn.
Diogelu defnyddwyr a thryloywder cryfach
Rhaid i gwmnïau ynni drosglwyddo arbedion o gynhyrchu adnewyddadwy rhatach.
“Mae cartrefi’n cael eu gwasgu nid oherwydd bod ynni’n ddrud, ond oherwydd bod y system yn hen ffasiwn. Mae pris pŵer glân wedi disgyn yn ddramatig, ac eto nid yw teuluoedd yn gweld yr un budd. Nid yw diwygiad yn ddewisol bellach. Dyma’r unig ffordd i sicrhau ynni fforddiadwy a diogel i bob cymuned ym Mhrydain.”
Justin Griffiths
Prif Ymgeisydd, Sir Gaerfyrddin
Gall Sir Gaerfyrddin Arwain y Ffordd
Mae Cymru’n cynhyrchu pŵer glân — dylai Sir Gaerfyrddin deimlo’r budd.
Mae Democratiaid Rhyddfrydol Cymru yn ymgyrchu dros:
- Biliau is i deuluoedd Sir Gaerfyrddin
- System brisio sy’n adlewyrchu gwir gost adnewyddadwy
- Buddsoddiad sy’n creu swyddi lleol
- Dyfodol ynni gwyrddach a mwy diogel