"Generation dips to 2,945 MW": how to read the power figure in the news

Most days this month, a newspaper has run a headline like "generation dips to 2,945 MW". What is that number, and what does it tell you about the light in your house?

What the number is

Every power station on the national grid sends electricity into it. Add up what they are all sending at one moment and you get the grid's generation, measured in megawatts (MW).

The grid operator, NISO, shows this figure online, plant by plant, and updates it through the day. Reporters read it off and publish it.

On Sunday at 11am, for example, The Sun read about 2,945 MW, with 12 plants at zero. Today's news story has the details.

It is a snapshot, not a daily total

The figure is like a photo of a busy road at one moment. Take another photo an hour later and it can look very different.

That is why reports can seem to contradict each other. Over the past weekend, BusinessDay reported 1,232 MW at 9am on Friday, The Sun reported 2,692 MW at 10am on Saturday, and 2,945 MW at 11am on Sunday. A few days earlier, Vanguard reported 3,659 MW at 3pm on Thursday, down from a peak of 3,996 MW the day before. All of these can be true, because they are different hours.

When you read a figure, look for the time and the day. A figure without them tells you little.

What is normal

In September 2026, the grid averaged about 4,089 MW an hour, according to NERC's monthly factsheet, as reported by ThisDay. The plants could have produced about 5,038 MW on average if everything had worked.

So 2,945 MW is more than a quarter below an average hour last month.

What "zero output" means

Many reports list the plants producing nothing. A plant at zero might be under planned maintenance, broken down, short of gas, short of water (for the hydro dams on the Niger), or switched off because the network could not take its power. The list alone does not tell you which. The plant owner, NISO or the minister usually has to say.

Why less power means fewer hours for you

DisCos can only share out what the grid gives them. When the total falls, NISO gives each DisCo a smaller allocation, and the DisCo switches feeders off in turns. That is load shedding. Band A feeders are meant to be protected, but in a deep shortage even they lose hours.

What it means for you

Next time you see a grid figure, compare it with about 4,000 MW, roughly a normal hour recently. Well below that, expect longer outages in your area. Above it, supply should be better unless your own feeder or transformer has a fault. If your area is dark while the grid figure is normal, the problem is more likely local, and your DisCo is the first place to call.