The Great Irish Sun Rush: A Ridiculously Deep Dive Into Who’s Winning and Why

Ireland and the sun have a complicated relationship. It’s like that person you were friends with for years, who you always thought was just okay, and then one day they show up to a party looking like a movie star and you suddenly realise you’ve been blind your whole life. For decades, we’ve thought of our national weather as a moody teenager who mostly wants to stay in its room and listen to sad music (i.e., rain). We’re the land of forty shades of green for a reason, and that reason is not an overabundance of glorious, uninterrupted sunshine.

And yet. Something absolutely bonkers has been happening.

While we were all busy complaining about the drizzle, Ireland quietly became a solar power rockstar. I’m not kidding. As of mid-2025, our little island has a cumulative installed solar capacity of over 1.76 Gigawatts. To put that in a language we can all understand, that’s enough juice to power around 370,000 houses. This isn’t a slow, gentle change. It’s an explosion. Our solar capacity has surged by almost 160% in just two years. For two years running, we’ve been one of the fastest-growing solar markets in the world. On one sunny day in May 2025, solar power met over 21% of the entire country’s electricity demand at its peak.

This is weird, right? It feels like finding out your quiet uncle is secretly a world-champion luchador. How did this happen? And more importantly, where is it happening?

Because here’s the real mystery: this solar gold rush isn’t happening evenly. A handful of counties are absolutely dominating, leaving others in the dust. And the league table of winners will almost certainly surprise you. It’s a story that has less to do with which county gets the most sun, and more to do with invisible electrical superhighways, hyperactive housing developers, and the powerful economic gravity of Dublin.

So today, we’re going on a deep, deep dive. We’re going to figure out the two different games of solar being played in Ireland, reveal the official county-by-county solar power league table, and then, in true Wait But Why fashion, we’re going to obsessively unpack the why behind it all. Grab a cup of tea. This is going to be fun.

First, You Need to Understand The Two Solar Games

Before we get to the county smackdown, you have to understand that not all solar is created equal. When we talk about “solar power in Ireland,” we’re actually talking about two completely different sports being played on the same field. A county’s success depends on which game it’s good at.

Let’s use an analogy. Imagine the national electricity market is a giant, country-wide pizza party, and everyone is hungry for pizza (kilowatt-hours).

Game 1: The Rooftop Pizza Delivery Service (Microgeneration)

This is the solar you see on your neighbour’s roof. It’s the grassroots, people-powered revolution. In our analogy, this is like thousands of families installing their own little pizza ovens on their roofs.

Each house makes a few pizzas, mostly for themselves. When the sun is shining, the oven is cranking out free, delicious pizza for the family inside to power their TV and charge their phones. If they make an extra pizza they can’t eat, they can sell it to the big Pizza Grid next door. This is the world of “microgeneration,” and it’s huge. We’re talking about more than 138,000 homes in Ireland with their own little power plants on the roof, adding up to a massive 576 MW of capacity. This game is won by having lots of people, lots of houses, and lots of new construction.

Game 2: The Giant Pizza Factory (Utility-Scale Solar)

This is the other side of the coin. These are the massive, sprawling solar farms you might see driving through the countryside—endless rows of glassy panels silently soaking up the sun. In our analogy, these are the giant, industrial-scale pizza factories.

These factories aren’t making pizza for one family. They’re churning out thousands of pizzas an hour and loading them onto massive articulated trucks (high-voltage power lines) to be shipped all over the country. This is the “utility-scale” game. These 19 or so giant sites make up the biggest slice of Ireland’s solar pie, with a whopping 885 MW of capacity. This game is won not by having lots of houses, but by having three key ingredients: huge tracts of available land, a friendly local council who will let you build your factory, and most importantly, a massive motorway interchange right next door to ship all your pizza out.

A county can be a champion at one game and terrible at the other. But the true titans of Irish solar are the ones who have figured out how to win both.

The 2025 Solar Power League Table: Who’s on Top?

Okay, enough with the analogies. Let’s get to the data. By combining the power from all the little rooftop pizza ovens (domestic systems) with the output from the giant pizza factories (solar farms), we can create a definitive league table. Who is the undisputed solar champion of Ireland?

Here are the top five:

The 2025 Solar Power League Table – Total Installed Capacity (MW)

1. Meath: 466.8 MW
2. Cork: 265.4 MW
3. Dublin: 205.0 MW
4. Wexford: 182.9 MW
5. Kildare: 145.5 MW

I know what you’re thinking. Meath? The Royal County, famous for ancient history and green pastures, is generating over a quarter of the entire country’s solar power? More than double its nearest competitor? How is that possible? And how is Dublin—a county with virtually no open land—in third place, ahead of the famously “Sunny Southeast” of Wexford?

This is where the story gets interesting. The answer lies in a weird combination of invisible infrastructure, planning permission quirks, and the unstoppable force of Dublin’s housing crisis.

The Deep Dive: Why the Winners are Winning

A. Meath: The Uncontested, Accidental Solar King

Meath’s dominance is so absolute it’s almost comical. With 466.8 MW, it’s not just winning; it’s lapping the competition. While it’s strong in the rooftop game (4th in the country for domestic systems), its victory is almost entirely down to its complete and utter mastery of the Pizza Factory game, boasting a staggering 427.4 MW of utility-scale solar farms.

Meath is home to Gallanstown (198 MW), the single largest solar project in Ireland, plus other behemoths like Gillinstown (136 MW) and Gaskinstown (85 MW). This didn’t happen by accident. Meath won the solar lottery because of a holy trinity of strategic advantages.

1. The Magic Electrical Junction Box: The most important factor has nothing to do with sun or land. It’s about the grid. County Meath happens to be home to the Woodland 400 kV substation. Think of the national grid as a series of motorways for electricity. The Woodland substation is basically the Red Cow interchange. It’s a massive, critical node where huge power lines from all over the country converge. For a solar developer wanting to build a giant pizza factory, finding a site near a huge motorway junction is the dream. It means you can easily ship your power out to where it’s needed most—Dublin. On top of that, EirGrid is currently undertaking two of the biggest grid upgrades in the country, the Kildare-Meath Grid Upgrade and the East Meath-North Dublin project, both of which are designed to pump even more power into and out of Woodland. Developers follow the grid, and right now, all roads lead through Meath.

2. Land and Planners Who Say “Yes”: Big solar farms need big, relatively flat, and not-environmentally-precious land. Meath has plenty of it. Crucially, Meath County Council has proven to be one of the most welcoming planning authorities for solar in the entire country, with a jaw-dropping 90.6% approval rate for commercial solar farms. This planning certainty is like gold dust to developers, telling them that if they spend the money to prepare an application, they have a great chance of it being approved.

3. The Dublin Overflow Effect: As a key part of the Dublin commuter belt, Meath is also a hotspot for new housing construction. And what do new, A-rated homes need to comply with modern building regulations? You guessed it: solar panels. This “new homes engine” means Meath is also a quiet giant in the rooftop pizza game, with nearly 9,400 homes generating their own power. Meath is firing on all cylinders—its fields are powering the nation, and its rooftops are powering its homes.

B. Dublin: The Rooftop Rebel Alliance

Dublin, in third place with 205.0 MW, is the complete opposite of Meath. It has almost no utility-scale solar farms to speak of (just 52 MW). Instead, it is the undisputed, undefeated, heavyweight champion of the rooftop pizza game, with an incredible 153.0 MW of power coming from over 36,400 individual homes and businesses.

Dublin’s strategy is a masterclass in urban energy generation.

1. Sheer Density of Hamster Wheels: The most obvious reason for Dublin’s success is its population density. It simply has more rooftops than anywhere else. Even with a slightly lower percentage of homes with solar compared to Meath or Kildare, its raw numbers are so huge that it blows everyone else out of the water. It’s a victory of scale—a rebel alliance of thousands of small generators combining to create a massive energy source.

2. The Crane Economy: Dublin is the epicentre of Ireland’s new housing boom, especially for apartments, which saw a 101% increase in completions nationally in Q2 2025. Over 42% of all new homes completed in that period were in Dublin. Just like in the commuter belt, these new builds are all aiming for A-ratings, and installing Solar Panels Dublin is one of the easiest ways for developers to get there. Every new apartment block that goes up is essentially a new mini power plant.

3. A City That Wants It: While land for giant pizza factories is non-existent, Dublin’s local authorities are all-in on the rooftop revolution. Agencies like Codema and ambitious plans like the Dublin City Climate Action Plan are actively pushing for more distributed generation, aiming for homes to be powered by 100% renewables.

But this brings up a crucial point. If you live in Dublin and you’ve just installed shiny new solar panels, you might feel like you’ve solved your energy problems. But you might just be pouring water into a leaky bucket.

Your house, especially if it’s an older one, is probably losing a massive amount of heat through its walls and roof. It’s like wearing a t-shirt in a snowstorm and trying to stay warm by holding a hot water bottle. It helps, but you’re fundamentally missing the point. Before you even think about generating more energy (or storing it in an expensive battery), the most logical and cost-effective first step is to stop wasting the energy you already have. This is where things like attic insulation and external wall insulation Dublin come in. Plugging those leaks is the foundation of a truly energy-efficient home. As the experts at the SEAI will tell you, insulation is often the simplest way to reduce your energy costs. If you’re serious about a full energy makeover, you need to think about the whole system, and a great place to start learning about that is by looking at comprehensive home energy upgrades.

C. Cork, Wexford, and Kildare: The All-Rounder, The Sun Worshipper, and The Boom Town

The other counties in the top five each represent a different winning formula.

Cork (2nd place, 265.4 MW): The Decathlete. As Ireland’s largest county with a huge population, Cork is a beast in both games. It has the second-highest number of domestic installations in the country, thanks to its sheer number of rooftops. But it also has vast tracts of agricultural land and decent grid connections, allowing it to host massive solar farms like the 131 MW Lysaghtstown project. It’s a hybrid powerhouse.

Wexford (4th place, 182.9 MW): The Natural. Wexford’s success comes from leaning into its god-given advantage: it is, genuinely, the “sunny southeast.” A solar panel in Wexford will produce 9.2% more electricity than the national average. That better return on investment makes it a magnet for developers. Combine that with a planning authority that is famously efficient and pro-solar (processing the most applications in the country with an 88.3% approval rate), and you have a recipe for success.

Kildare (5th place, 145.5 MW): The Boom Town. Kildare’s story is a carbon copy of Meath’s, just on a slightly smaller scale. It is a primary destination for Dublin’s urban sprawl, with a massive number of new dwellings being built. This has given it the highest proportion of A-rated homes in all of Ireland (28%), which directly translates to a thriving rooftop solar market. At the same time, it’s at the heart of the strategic grid upgrades needed to power Dublin, making it a prime location for huge solar farms like the 108 MW Timahoe North project.

The Future: It’s All About The Traffic Jam

So what does this all mean for the future? Ireland has a monumental goal: to get to 8 Gigawatts of solar capacity by 2030. That’s more than four times what we have now. To get there, we need to build at an unprecedented rate.

The leaders—Meath, Cork, Dublin, Wexford, and Kildare—are likely to stay on top for a while. They have the momentum, the infrastructure, and the pipelines. But the single biggest factor that will shape the solar map of 2030 is the national grid.

Think back to our pizza factory analogy. You can build the biggest, most efficient pizza factories in the world, but if there’s only one B-road leading out of town, you’re going to have a massive pizza traffic jam. That’s what’s happening with the Irish grid. The best spots to connect in the East and South are getting saturated.

This means the next wave of solar development will be forced to go where the grid has space, not necessarily where the sun is best or the land is cheapest. This could be a huge opportunity for “challenger” counties in the Midlands and West. The counties that will climb the league table will be the ones that can cleverly match their local advantages with the strategic plans of the grid operator, EirGrid.

The Irish sun rush is really two stories happening at once. It’s a top-down, industrial-scale revolution happening in the fields of a few strategically-placed counties. And it’s a bottom-up, grassroots rebellion happening on hundreds of thousands of rooftops across the country. Both are essential, and both are just getting started. As you can see from this guide to home energy savings, there are many ways to contribute to a greener future. So, whether you’re living in a solar hotspot or not, you can still join the rooftop revolution and start generating your own clean energy by looking into Solar Panels Dublin.