China added 329 GW of solar in 2024 alone — equivalent to the entire GB solar fleet every 32 days. Britain just set an all-time record of 15,420 MW. Here's what the gap tells us, why it matters less than people think, and what the UK should do next.
I keep a tab open just for this number
It sounds like a slightly unhinged habit. But every morning I check how much solar Great Britain is generating right now. A big number in megawatts. A chart of today's curve. A bar showing what percentage of the all-time record we're at.
Then last week I looked at what China's doing with the same technology and my brain needed a moment.
The number that breaks your brain
China installed 329 gigawatts of new solar capacity in 2024.
Not total. New. In one year.
For scale: that's more than the entire world installed in 2022. It's equivalent to the whole of Britain's solar fleet being replicated every 32 days. China's total capacity is now 887 GW — roughly 43 times the size of everything on British rooftops and solar farms combined.
The install rate works out to roughly 900 MW per day. Every single day. Saturdays included.
I don't say this to be depressing. I say it because understanding what China proved changes how you think about what's happening here.
What China actually proved
China didn't just build a lot of panels. It ran the world's largest real-world test of whether solar can be a primary energy source for a modern industrial economy.
The result: yes. Obviously. Without question.
A country of 1.4 billion people, with massive manufacturing, steel, concrete, and heavy industry, is now generating over 20% of its electricity from solar — and the figure is climbing fast. The engineering problems have been solved. The cost problems have been solved. The intermittency problems are being solved at scale with storage and grid flexibility.
That matters for Britain because it removes every remaining theoretical objection. The question is no longer can solar power an economy? The question is how fast does Britain want to get there?
What Britain is actually doing
Here's what people miss: Britain's grid is already doing something remarkable.
On 23 April 2026, Great Britain's solar panels hit 15,420 MW — a new all-time national record. At that moment, 42% of the entire GB electricity grid was running on sunlight. Gas generation simultaneously fell to 1.2% of the mix.
A week earlier, it was 14,426 MW. The week before that, 14,414 MW. Three national records in three weeks.
This is a 20.5 GW fleet — tiny by Chinese standards — running a modern economy's grid through a spring afternoon.
You can watch it live. sunhours.app/solaruk pulls the live MW figure from Sheffield Solar PV_Live every 5 minutes. On a clear spring morning you'll watch it climb through 8,000 MW, 10,000 MW, 12,000 MW. It feels different watching a number rather than reading about it.
The three things Britain should steal from China
Not copy wholesale — context matters. But three specific things:
1. Permitting speed. China simplified grid connection approvals dramatically. In the UK, solar farms still queue for grid connection for years. The government's Planning and Infrastructure Bill has started to fix this, but the backlog is long and the pace needs to increase.
2. Domestic manufacturing ambition. Britain imports almost all of its solar panels, mostly from Chinese manufacturers. That's not a scandal — Chinese panels are excellent and affordable — but it does mean supply chain vulnerability. Some investment in UK or European panel manufacturing would improve energy security. It's also a jobs story.
3. Storage and grid flexibility. China's high solar output periods are smoothed by significant battery storage deployment and demand-response programmes. Britain has made real progress here — the BESS (battery energy storage) market has grown fast — but the grid's ability to absorb very high solar output still constrains how fast new capacity can be added.
The thing that doesn't matter
The size gap.
Yes, China has 43 times more solar installed than Britain. Britain has 1/16th the population of China and a fraction of the land area. The comparison isn't instructive.
What's instructive is the trajectory. Britain added around 5 GW of new solar in 2024. That's not China's rate, but it's a serious rate. The pipeline of projects in planning is substantial. The cost curve continues to fall.
More importantly: the resource is there. Britain gets 2.2 to 3.2 peak sun hours per day. That's comparable to Germany, which has 60 GW installed and a mature solar market. The April records weren't a fluke — they're what happens when you build enough panels in a country that gets enough sun, which Britain absolutely does.
What this means if you have panels on your roof
Your system is part of something that is clearly, demonstrably working.
On the days Britain is setting records, your panels are having their best days too. The more panels on British rooftops, the more often the gas figure falls below 2%. The more often electricity is cheap enough that smart tariffs go negative.
Britain will never install 329 GW in a year. But it will keep installing, keep breaking records, and keep pushing gas further toward irrelevance on the grid.
The number I check every morning keeps going up.
Watch Britain's solar fleet live — right now
The GB solar generation counter at sunhours.app/solaruk updates every 5 minutes straight from Sheffield Solar PV_Live. On a good spring day you'll watch it climb past 10,000 MW and keep going. Free, no account, no signup.
Get it on Google Play →