Will There Be Power Cuts This Winter? NESO's 2026/27 Winter Outlook Explained (Essex 2026)

The National Energy System Operator (NESO), which runs Britain's electricity system, published its Winter Outlook for 2026/27 on 23 October 2026. The headline is reassuring: NESO expects enough electricity supplies to meet demand throughout the winter. But a secure national grid is not the same as a guarantee that your own lights will stay on. This guide explains what the outlook says, what it does not cover, and what households and businesses in Thurrock, Stanford-le-Hope, Corringham, Upminster and across Essex can do to be ready. It is accurate as of 25 October 2026.

What did NESO's Winter Outlook 2026/27 say?

According to NESO, Britain's electricity supplies are expected to remain secure this winter. It expects a margin of 5.9 GW, around 9.5% above peak demand. The margin is the buffer between the electricity expected to be available and what the country is expected to need at the busiest times.

NESO says additional battery storage, wind generation and gas-fired power are helping to keep margins healthy, broadly in line with recent winters. It also notes that the margin is higher than in its June 2026 early view because of changes to how it is calculated, not because the overall picture has changed.

Does that mean there will be no power cuts this winter?

Not quite. The Winter Outlook is about whether the country has enough generation to meet demand. Most power cuts that people actually experience are local: storm damage to overhead lines, a fault on an underground cable, or a problem inside the property itself. Those can still happen in any winter.

If your power goes off, check whether neighbours are affected. If it is just your property, look at your consumer unit (fuse board) to see whether a switch or RCD has tripped. If the area is affected, call 105, the free national power cut number, to report it or get updates from your local network operator. Our recent guide on what to do in a storm power cut covers this in more detail.

Can a home battery keep my house running in a power cut?

It depends on how the system is designed. Many home batteries are installed to store solar power and cheaper off-peak electricity, and do not automatically supply the house when the grid goes down. To provide backup, the system needs the right equipment and wiring, so that the house is safely isolated from the grid during an outage.

Some systems, including Tesla Powerwall installed with suitable backup equipment, can keep selected circuits or the whole home running during a power cut, depending on the battery size and what you are using. If backup matters to you, say so at the design stage rather than after installation. CPW is a certified Tesla Powerwall installer, and you can find out more on our solar and battery page.

Can I get paid for using less electricity at peak times?

NESO runs the Demand Flexibility Service, which rewards homes and businesses for shifting when they use electricity. It has run year-round since November 2024. Households usually take part through their energy supplier or an approved app, and normally need a smart meter. Ask your supplier whether they take part and how payments work.

A home battery, a smart EV charger or a heat pump with good controls can make it easier to move usage away from the busiest evening hours without changing your routine much. See our EV chargers, heat pumps and air conditioning page for the work we carry out.

How can I get my home's electrics ready for winter?

Winter puts extra load on electrical installations: more lighting, heating, cooking and charging, often all in the evening. A few sensible steps:

• Know where your consumer unit is and how to reset a tripped switch safely.

• Keep a torch handy rather than relying on candles.

• Don't overload extension leads, especially with heaters.

• Watch for warning signs such as scorch marks, buzzing, warm sockets or circuits that keep tripping.

• If your installation has not been checked for some years, consider an Electrical Installation Condition Report (EICR).

Landlords in England must have the electrical installation inspected and tested at least every five years. Find out more on our EICR page and our electrical testing and compliance page. For businesses that cannot afford downtime, see our commercial electrician page.

FAQ

Is Britain expected to have enough electricity this winter?

Yes. NESO's Winter Outlook 2026/27, published on 23 October 2026, expects enough supply to meet demand, with a margin of around 9.5% above peak demand.

Who do I call in a power cut?

Call 105 for power cuts affecting your area. If only your property is affected, check your consumer unit first, then call an electrician if a switch will not reset.

Will my solar panels work in a power cut?

A standard grid-connected solar system switches off during a power cut for safety. Backup needs a suitable battery and backup equipment.

Do I need a smart meter for the Demand Flexibility Service?

Usually, yes. Check with your energy supplier.

Need an electrician in Essex?

CPW Electrical Solutions LTD is an electrical contractor based in Thurrock, covering Thurrock, Stanford-le-Hope, Corringham, Upminster and the wider Essex area. We are NICEIC Approved Contractors (607863000), MCS certified (NIC602214) and certified Tesla Powerwall and Wall Connector installers, with £2m public liability and £300k professional indemnity insurance. Call 07545 571230 (phone answered 7am to 7pm, with 24-hour emergency call-outs available) or request a quote.