Solar Panel Installations in Northern Ireland Hit Record Levels in 2025

2025 was a landmark year for solar energy in Northern Ireland. More homeowners installed solar panels than in any previous year, continuing a sharp upward trend that began in 2022. While precise figures are still being compiled by OFGEM and the Microgeneration Certification Scheme (MCS), industry estimates suggest that residential solar installations in NI grew by approximately 35% compared to 2024.

So what is driving this surge, and what does it mean for homeowners thinking about making the switch in 2026?

The numbers behind the growth

Northern Ireland has historically lagged behind the rest of the UK in solar adoption. For years, the region had one of the lowest rates of domestic solar installations per capita in the United Kingdom. That gap is now closing rapidly.

MCS data shows that the number of certified residential solar installations across NI has more than tripled since 2021. What was once a niche choice, limited mainly to eco-conscious early adopters and rural self-builders, has become a mainstream home improvement. Installers across Belfast, Lisburn, Derry, Newry and beyond report full order books and growing waiting lists.

What is driving the boom?

Several factors have converged to make 2025 the tipping point for solar in Northern Ireland.

Rising electricity prices

The single biggest driver is the cost of grid electricity. With rates sitting between 24p and 28p per kWh in early 2026, homeowners are paying roughly 50% more for electricity than they were five years ago. At these prices, the financial case for solar panels is stronger than ever. A typical 4kW system can now save a household £500 to £800 per year, depending on usage patterns and whether battery storage is included.

0% VAT on solar installations

Since April 2022, residential solar panel installations in the UK (including Northern Ireland) have benefited from a 0% VAT rate. For a typical system costing £6,000 to £8,000, that represents a saving of £1,200 to £1,600 compared to the old 20% rate. This policy has made solar noticeably more affordable and has removed one of the key financial barriers for many households.

Falling panel and battery costs

The cost of solar panels and battery storage has continued to decline globally, driven by manufacturing scale and competition. A 4kW solar panel system that might have cost £8,000 to £10,000 five years ago can now be installed for £5,500 to £7,500, depending on the brand and configuration. Battery storage costs have also dropped significantly, making combined solar-and-battery systems accessible to a much wider range of homeowners.

Growing climate awareness

While the financial argument does most of the heavy lifting, environmental motivation should not be underestimated. More NI homeowners are actively seeking ways to reduce their carbon footprint, and solar panels are one of the most visible and impactful steps a household can take. The growing frequency of extreme weather events and increased media coverage of climate issues have kept sustainability firmly in the public conversation.

Word of mouth and visibility

As more homes in Northern Ireland have solar panels installed, the technology becomes normalised. Neighbours see panels on nearby roofs, hear about the savings at school gates and football matches, and become curious themselves. This social proof effect is one of the most powerful drivers of adoption and tends to accelerate over time.

How NI compares to the rest of the UK

Despite the recent growth, Northern Ireland still has some catching up to do. England and Wales have significantly higher solar adoption rates per household, partly because of earlier incentive schemes like the Feed-in Tariff, which was less widely promoted in NI. Scotland has also outpaced Northern Ireland, supported by additional government grants.

However, the gap is narrowing. NI’s growth rate in 2025 was among the highest of any UK region on a percentage basis, suggesting that the region is in the early stages of a rapid catch-up phase. The fundamentals are strong: NI has comparable sunshine levels to much of Scotland and northern England, and the economic drivers are equally compelling.

What this means for 2026

Industry observers expect the growth trend to continue through 2026 and beyond. Several factors support this outlook.

First, electricity prices show no sign of returning to pre-2022 levels. As long as grid electricity remains expensive, the savings from solar will continue to attract new adopters.

Second, installer capacity is expanding. More companies are entering the NI market and existing installers are hiring additional teams. This should help reduce waiting times, which stretched to several weeks in some areas during the 2025 peak season.

Third, battery technology continues to improve. Newer batteries offer greater capacity, longer warranties and smarter energy management features, making solar-plus-battery systems an increasingly attractive proposition.

For homeowners who have been considering solar panels but have not yet taken the plunge, the message from 2025’s record installation figures is clear: your neighbours are already doing it, and for good reason.

Ready to explore your options?

The best way to find out what solar panels could do for your home is to compare quotes from multiple MCS-certified installers. Use our free comparison tool to receive up to three quotes from trusted local installers across Northern Ireland. It takes just two minutes, and there is no obligation.