Go back ten years and telling someone the UK would have two million solar installations by 2026 would have raised a few eyebrows. It has happened. The government confirmed it last month, off the back of March 2026 being the busiest single month for solar installations since 2012.

That is worth sitting with for a moment. One month. 27,607 homes and businesses decided to go solar in March alone. That is nearly a thousand a day.

And yet — if you drive through most UK towns and look up at the rooftops, the majority of them are bare. Two million sounds like a lot until you remember how many properties there are in this country. The honest answer is that we are still right at the start of this.

The UK government wants 45 gigawatts of solar capacity by 2030. We are currently at 22.1. To get there, the pace of installation has to more than double. In less than four years.

So what changed in March? A few things. The 0% VAT rate on solar has made installations noticeably cheaper. Finance options have got much more accessible — more households can now spread the cost rather than needing a lump sum upfront. And frankly, the penny has dropped for a lot of people that energy prices are not coming back down. Every month you put off going solar is a month you spend paying your supplier more than you need to.

The technology has also moved on considerably. The panels being installed today are significantly more efficient than what was available five years ago. Batteries have come down in cost. The whole system — panels, inverter, storage — is more reliable, better monitored, and better supported than it has ever been.

The two million milestone is genuinely good news. But the more interesting question is what happens to the next two million. That is where most of us live — in homes that could be generating their own electricity, cutting bills, and earning from the Smart Export Guarantee, but are not yet doing so.

If your roof is one of them, it is worth at least finding out what a system would look like for your property. A survey costs you nothing and takes a couple of hours. The numbers might surprise you.