Power Cuts in Wales: Networks, Support and Compensation

Power cuts in Wales are fixed not by your energy supplier but by your local electricity network operator, the company that owns the wires and cables in your area. When your supply goes off, you report it by calling 105, a free number that connects you to that operator wherever you are in Wales¹. The rules that govern how quickly power must be restored and what compensation you are owed are set by Ofgem's Guaranteed Standards of Performance, and they cover England, Scotland and Wales alike².

The headline figures are straightforward. In normal weather your network operator has 12 hours to restore your supply; in the most severe storms that deadline extends to 48 hours². If the cut runs long, a home can claim £100, plus an extra £45 for every additional 12-hour period without electricity, up to a maximum of £400 where 5,000 or more properties are affected². Payments are usually automatic, arriving within 10 working days, and an extra £40 is owed if the operator fails to pay on time¹.

Who operates Wales's electricity grid

Wales's electricity reaches homes through distribution network operators, the regional companies licensed to run the cables, substations and overhead lines that carry power from the national grid to your meter. Your energy supplier, the company you pay your bill to, has no role in fixing a cut: the wires belong to the network operator, and it is the operator's engineers who restore supply. The Guaranteed Standards that set restoration deadlines and compensation apply across England, Scotland and Wales, so the core protections are the same in Cardiff as in Carlisle².

Wales is a substantial electricity consumer rather than a trivial one. Official statistics show Wales consumed 14.8 TWh of electricity in 2023, including losses⁵, and electricity represents approximately 16% of Wales's estimated 92.8 TWh total energy consumption⁶. The Welsh Government is also shaping the infrastructure behind that supply: it has consulted on strategic grids that connect Wales from north to south, and on planning for the electricity grid in Wales being based on policy considerations as well as functionality by 2025⁷. A new public energy company owned by the people of Wales has also been announced, aimed at capturing more of the value of Welsh energy generation for Welsh households⁸.

For a household thinking about energy independence, the important point is that the network, not the supplier, is the single point of failure. Whatever tariff you are on, and whoever generates the power, a fault on the shared wires takes out every home on that circuit at once. That is why the Guaranteed Standards exist, and why the compensation and support described on this page come from the network operator rather than from any energy company. Our pillar page on backup power for UK homes sets out the wider picture.

Power cut? Call 105

The single number to know is 105. It is free to call, it works across the UK, and it routes your call to the electricity network operator for your part of Wales, so you do not need to know the operator's name or find its number in the dark¹. Ofgem's advice on planning for a power cut is to keep the number accessible, because a cut can take out mobile charging, broadband and the ability to look anything up online¹.

Before calling, it is worth checking whether the fault is yours alone. If your neighbours have power and your home does not, the problem may be internal, for example a tripped main switch, rather than a network fault. If the whole street is dark, the operator will already be receiving calls, but reporting confirms the extent of the outage and helps direct engineers. Our page on whether the power cut is just your property or the local area goes through the checks.

Calling 105 also matters for what follows. The operator records when your supply was interrupted, and those records underpin any compensation claim. For planned cuts, advance notice is required, and where that notice is inadequate, for example less than two days' warning or a cut on a different day from the one warned about, the compensation is £40⁹.

How quickly supplies must be restored: 12 hours, or 48 in storms

The Guaranteed Standards of Performance set the clock. For interruptions outside severe weather, your local network operator must restore your supply within 12 hours¹. That deadline is the trigger for compensation: a home cut off for longer than 12 hours, where fewer than 5,000 properties are affected, is entitled to the £100 payment².

Severe weather changes the clock, and the standards recognise two storm categories. In severe storm category 1 weather, where unusually bad weather conditions, including lightning, cause at least 8 to 13 times more faults than normal, the restoration limit is 24 hours². In severe storm category 2 weather, where very severe weather causes at least 13 times more faults than normal, the limit is 48 hours¹. National Grid Electricity Distribution, one of the operators serving Wales, states that in more extreme weather events or circumstances the restoration time permitted under the Standards of Performance varies, and that in a category 2 storm it has 48 hours to restore supplies¹¹.

The categories are technical, defined by fault rates rather than by the weather you see from your window, and it is the operator that declares them. What they mean in practice is that after a serious storm a Welsh household may legally wait two days before compensation begins to accrue, which is a long time in a winter outage with no heating. Households that rely on electricity for heating or medical equipment should plan on that basis rather than on the 12-hour figure, and the Priority Services Register section below sets out the free support available.

Payments for outages: £100 per household and £45 per further 12 hours

For an unplanned cut in normal weather, the standard payment to a home is £100. The threshold depends on how many properties were affected: if fewer than 5,000 homes lost power, the £100 is owed once your supply has been off for more than 12 hours; if more than 5,000 homes were affected, the £100 starts after 24 hours². Businesses are paid more, at £195 under the same conditions².

On top of the initial payment, you get an extra £45 for every additional 12-hour period without electricity¹. Ofgem gives worked examples: a cut that lasts more than 12 hours and is interrupted for 36 hours brings 2 additional £45 payments, adding up to £90, and a cut that lasts more than 24 hours and is interrupted for 72 hours brings 4 additional £45 payments, adding up to £180². The maximum amount you could be paid is £400 if the power cut affects 5,000 or more properties².

Storm cuts pay differently. For storm category 2, you can get £90 for the first 48 hours and an extra £45 for every 6 hours after¹. Citizens Advice gives the same structure for storm cuts generally: £45 for every 6 extra hours without power, up to a maximum of £2,235¹². National Grid's published standards show a category 1 storm payment of £90 at 24 hours and £450 at 72 hours of continuous outage, and a category 2 payment of £90 for power cuts lasting over 48 hours with £45 for each complete 6-hour period thereafter, up to the same maximum¹¹. The storm regime is more generous per hour than the normal-weather regime, reflecting the longer outages storms cause.

The compensation is a payment for the failure of service, not a reimbursement for your losses. It does not cover spoiled food, a hotel night or damaged equipment, and Ofgem's consumer research found that views on the appropriate level of compensation varied widely among participants, while there was widespread agreement that compensation is an important element of responding to service failings¹³. Households with larger losses may need to look to insurance, which our page on claiming on insurance after a power cut covers.

Automatic compensation and making a claim

For ordinary unplanned cuts, the payment is not something a household has to chase. An automatic payment is made by the electricity network operator within 10 working days³. The operator pays automatically if it holds the customer's bank details, and payment can be made by cheque, cash or bank transfer¹.

Where the automatic payment does not arrive, the process is a claim. A claim made after the operator has failed to pay within 10 working days carries an extra £40 compensation¹². Ofgem puts the same point more generally: if the payment has been missed, the operator may owe an extra £40¹.

Storm cuts run on a slower clock because of their scale. For storm power cuts the payment is still automatic, but where it has not been made within 4 weeks of the power coming back on, the route is to contact the operator and make a claim¹².

The practical steps, in order:

1. Note when the cut started and ended, and keep any messages from the operator.
2. Wait for the automatic payment: 10 working days for ordinary cuts, 4 weeks after restoration for storm cuts³.
3. If nothing arrives, claim directly with your network operator, by phone or through its website.
4. If the claim is accepted but payment is late, an extra £40 is owed¹.

The payment for four outages in one year

A separate payment exists for households whose supply keeps failing. You could get an extra £100 if your power has gone off more than 4 times between 1 April and 31 March the following year, and each power cut must have lasted at least 3 hours¹. Citizens Advice describes the same payment as £100 if your power goes off 4 times or more between 1 April and 31 March, each lasting 3 hours or more³.

Unlike the single-cut payments, this one is never automatic. A claim must be made with the local network operator, who will decide whether the payment is due¹. The claim window runs across the financial year, so a record of the date and duration of each outage kept as it happens is what a claim of this kind rests on.

There are two exclusions to be aware of. You will not get this compensation if you have qualified for compensation from any power cuts in the same 12 months, and planned cuts you were told about do not count¹². Which? gives the repeated-cuts payment as an extra £95, while Ofgem's current guidance states £100, and the two figures differ⁹; because Ofgem sets the standards and reviews the amounts annually for inflation, its current figure is the one a claim should be based on².

Situations where no compensation is due

The standards have firm edges, and several common situations fall outside them. No compensation is paid for blackouts caused by a national power shortage, for damage to electrical equipment or appliances, or for a low supply after a power cut¹. Citizens Advice Wales gives the same list and adds that you will not get compensation in certain situations where the power cut was caused by an emergency, for example a blackout because of a national power shortage¹².

• National power shortage. If demand exceeds generation across the whole system, the resulting blackouts are outside the compensation scheme¹. Planned emergency disconnections of this kind are a last resort and would not affect everyone at the same time; in Northern Ireland the system operator SONI instructs NIE Networks to reduce demand through planned emergency power cuts when generation is insufficient, and the same principle of rota disconnections applies UK-wide¹⁴. Our page on rota power cuts explains how they would work.
• Damage to your own equipment or appliances. The standards pay for the loss of supply, not for what the loss or the restoration does to your devices¹.
• Planned cuts you were told about. Properly notified planned work does not attract the standard payments, though a failure to give two days' notice, or cutting you off on a different day from the one warned about, earns £40⁹.
• The repeated-cuts payment has its own exclusions: it is not available if you qualified for compensation from any power cuts in the same 12 months, and planned cuts you were told about do not count¹².

The national-shortage exclusion matters for energy independence in particular. The compensation regime is built around network faults, the everyday failures of wires and equipment. It is not built around the system as a whole running short of generation, which is the scenario in which rota disconnections would be used. A household that wants protection against that scenario is looking at backup power, not compensation.

Free help for vulnerable customers through the Priority Services Register

The Priority Services Register is a free service provided by water and power suppliers for households that may need extra help when supply fails⁴. Network operators must offer customers on the register extra help for both planned and unplanned power cuts, for example giving them battery packs so that they can still charge phones or medical equipment¹. Registration is free of charge to vulnerable consumers¹⁵.

Eligibility is broad. It includes households that use medical equipment reliant on electricity or water, alongside people who need support for reasons of age, disability, illness or communication¹⁶. The services energy companies are required to provide free of charge include a password scheme for home visits, a free gas appliance safety check, advice and information about interruptions, alternative heating and cooking facilities, quarterly meter readings, accessible bills and information, redirection of bills to a nominated person, and assistance for customers whose English is not their first language¹⁵. A parliamentary briefing on the register lists similar services, including regular personal meter readings which may help stop large backlog bills building up, and advanced warnings of power cuts¹⁷.

Operators serving Wales add their own support on top. SSEN offers a free personalised Power Cut Plan tailored to needs, routines and communication preferences, included in the welcome letter once registered¹⁸. For customers with sight loss, hearing loss or dementia there is tailored communication support, including a free British Sign Language Video Relay Service and a dedicated textphone¹⁸. Advance notice of planned power cuts gives time to charge hearing aids, visual alarms and vibrating equipment²⁰.

Registration is straightforward. You can register online using your postcode, by phone, or by post using a leaflet available in alternative languages, large print and easy read¹⁶. You can also register on behalf of a family member, friend or someone you care for¹⁸. Carmarthenshire County Council's advice is to contact all your utility suppliers directly to sign up²¹. Our pages on who is eligible and how to join go through the detail.

Limits of Priority Services registration

The register has one firm limit that households often misunderstand: it does not buy you a faster reconnection. Operators state it plainly: "No. Our teams work hard to restore power to affected areas but can't prioritise individual households."²² Restoration follows the network's repair schedule, which is driven by how many customers each fix restores and by engineering priorities, not by who is on the register. A registered household in a remote area can therefore wait just as long as its unregistered neighbours.

What registration does change is what happens while you wait and how you are treated:

• Advance notice of planned power cuts where possible, giving time to prepare²⁰.
• Extra support during interruptions, including battery packs for phones and medical equipment, and alternative heating and cooking facilities¹.
• Accessible communication, including BSL video relay, textphone and information in accessible formats¹⁹.
• A password scheme so callers at the door can be verified, and a free gas appliance safety check¹⁵.

Registration also does not change your commercial relationship. Who you pay your bill to for your energy will not change, and you will be added to your energy supplier's own Priority Services register as well¹⁸. Your details will be shared with your energy supplier and your local gas and water networks so the support follows you across utilities¹⁶. Operators hold that data on the basis of legitimate interests and on substantial public interest, protecting adults and children at risk, and state that the details are not used to sell anything²².

The honest conclusion for a Welsh household is that the register is genuinely valuable and genuinely limited. It is the difference between a cold, silent, uninformed outage and one with warning, contact and practical help, but it is not a substitute for your own preparations. A household that relies on mains power for medical equipment should treat the register as one layer, alongside the backup measures on our backup power and energy independence page.

Getting your home in Wales ready for an outage

Preparation is the part of resilience that compensation cannot replace. The Met Office advises signing up for the Priority Services Register in case of power cuts, and keeping the 105 number to hand⁴. NI Networks' preparation advice, written for planned emergency cuts but sound for any outage, is to have warm clothes and blankets accessible in case you experience a prolonged power cut, and to check on elderly or vulnerable neighbours, family and friends and make them aware of what is happening²³.

For Welsh homes the case for preparation is stronger than the averages suggest. Rural supply in Wales runs through long overhead lines exposed to the weather, and the storm categories exist precisely because a single severe event can multiply faults more than thirteenfold². The 48-hour storm deadline means a winter household should be able to get through two days without mains power: light that does not need the grid, a way to keep a phone alive, food that does not need cooking, and a way to stay warm. Our pages on how to prepare your home for a winter power cut, keeping warm during a power cut and how long food lasts in a fridge or freezer cover each of these in turn, and portable power stations and home UPS systems set out the equipment options.

The independence lens is the right way to finish. Compensation pays you after the event; the register supports you during it; neither keeps your lights on. A Welsh household that can ride out a 48-hour storm cut on its own preparations, or on its own stored power, is the only one whose resilience does not depend on the network's repair schedule.