Solar Panels Derry 2026: Costs, Installers & Local Guide

Solar Panels in Derry: A Local Guide for 2026

Derry is Northern Ireland’s second largest city, with around 240,000 people living across the wider Derry City and Strabane council area. The city straddles the River Foyle, with the Cityside and Waterside connected by the Peace Bridge and the Craigavon and Foyle bridges. Whether you live in a terraced house off the Strand Road, a semi in the Waterside, or a detached property out towards Eglinton, solar panels can work for your home.

With electricity prices continuing to rise across Northern Ireland, a growing number of Derry homeowners are turning to solar to cut their bills and take control of their energy costs. The BT47 and BT48 postcodes cover the city and surrounding areas, and installations have been steadily increasing across both.

This guide covers everything a Derry homeowner needs to know: what solar panels cost in the city, how much electricity they generate in the northwest, which areas and property types are best suited, how to find reliable installers, and what grants or schemes you may be eligible for.

What Do Solar Panels Cost in Derry?

Solar panel prices in Derry are broadly in line with the rest of Northern Ireland. Because there are fewer MCS certified installers based in the northwest compared to the Belfast area, it is particularly important to compare quotes to ensure you get a competitive price.

Here is what you can expect to pay in 2026 for a fully installed solar panel system in Derry, including 0% VAT.

System Size	Panels	Typical Cost	Best For	Annual Savings
2.5-3kW	6-8	£4,500 - £6,500	Terraced house	£390 - £490
4kW	10-12	£6,000 - £8,500	Semi-detached	£630 - £660
5kW	13-15	£7,500 - £10,000	Larger semi or detached	£790 - £820
6kW	15-18	£8,500 - £12,000	Large detached, high usage	£940 - £990

The savings column assumes 45% of the output is used in the house at Power NI’s 32.10p to 34.15p per kWh and the rest is exported at 11.88p, using the generation figures further down this page.

These figures reflect real quotes from installers covering the Derry area. Your actual cost will depend on your roof type, panel brand, and whether you add battery storage. For a detailed breakdown of what is included in the price, see our full solar panel costs guide.

The single most effective way to get a competitive price is to compare quotes. Quotes for the same system routinely differ by more than £1,000, and you cannot see that spread from a single quote. Compare free quotes from MCS certified installers covering the Derry area.

How Much Electricity Will Solar Panels Generate in Derry?

Derry sits at approximately 55 degrees north latitude, slightly further north and west than Belfast. The city’s position on the northwest coast means it receives a little less sunshine than the eastern side of Northern Ireland, with more cloud cover rolling in from the Atlantic. Derry gets around 880 to 920 kWh of solar irradiance per square metre per year, compared to Belfast’s roughly 950 kWh.

However, there is an important upside. Derry’s cooler, windier climate, influenced by the Atlantic, means solar panels operate more efficiently. Panels lose efficiency in high heat, so the moderate temperatures in the northwest help them perform closer to their rated output during the summer months.

Here is what you can realistically expect from a solar panel system in Derry across a full year.

System Size	Annual Generation (Derry)	Best Months	Winter Months
3kW	about 2,250 kWh	May-Jul: 280-335 kWh/month	Dec-Jan: 40-65 kWh/month
4kW	about 3,000 kWh	May-Jul: 390-455 kWh/month	Dec-Jan: 55-90 kWh/month
5kW	about 3,745 kWh	May-Jul: 475-555 kWh/month	Dec-Jan: 70-105 kWh/month
6kW	about 4,500 kWh	May-Jul: 570-660 kWh/month	Dec-Jan: 90-135 kWh/month

These figures assume a south-facing roof at an angle of 30 to 40 degrees, which is the optimal setup. They are the solar system sizes guide figures less the roughly 10% Derry trails Belfast by on our tracker. East or west-facing installations will generate roughly 80 to 85% of these numbers.

The seasonal variation is significant, just as it is across all of Northern Ireland. In June and July, a 4kW system can generate 390 to 455 kWh per month, often more than a typical household uses. In December and January, output drops to around 55 to 90 kWh. This is why battery storage is worth considering: it lets you store surplus daytime energy for use in the evenings, and pairing it with a time-of-use tariff can extend the benefits into winter as well.

Germany, which has a similar climate to Northern Ireland, is one of the largest solar energy producers in the world. The difference between Derry and Belfast in terms of annual generation is relatively small, and solar remains a strong investment across the northwest.

Typical Savings for Derry Households

The amount you save depends on three things: your system size, how much of the output you use in the house, and your unit rate. Power NI’s domestic unit rates are 32.10p to 34.15p per kWh including VAT from 1 July 2026, and the Consumer Council’s comparison of 6 September 2026 put the NI market range at 29.83p to 42.01p. The table uses the same assumptions as our solar calculator and solar system sizes guide: 45% of the output used in the house and valued at 33.1p, the midpoint of Power NI’s rates, the rest exported at Power NI’s 11.88p (1 October 2026 to 30 September 2027), and generation from the Belfast output my Solar Today tracker modelled from recorded weather, corrected to a south-facing pitched roof. If your unit rate is above 33.1p the savings are higher and the paybacks shorter.

House type	System size	Installed cost, 2026	Annual generation	Share used at home	Annual saving	Simple payback
Terrace or small semi	3kW	£5,000 to £6,500	2,500 kWh	45%	about £535	11 years
Three-bed semi	4kW	£6,000 to £8,000	3,330 kWh	45%	about £714	10 years
Larger semi or detached	5kW	£7,000 to £9,500	4,160 kWh	45%	about £892	9 years
Four-bed detached	6kW	£8,000 to £12,000	5,000 kWh	45%	about £1,071	9 years

Derry is one of the seven towns on my tracker. Between 24 January and 22 September 2026 it came in lowest of the seven, about 10% below Belfast (2,155 kWh for a 4kW system against 2,389), so take roughly a tenth off the generation and saving columns.

The share you use is the biggest lever. A battery typically lifts it by 20 to 30 points. At 25 points on a 4kW system, that is about 830 more units a year used at 33.1p instead of exported at 11.88p, or roughly £177 a year, for a battery costing £3,000 to £5,000 on the range our calculator uses.

For the full payback calculation, see our solar panel payback period guide.

Derry’s Housing Stock and Solar Suitability

Derry has a varied mix of housing types, from Victorian terraces within the city walls area to modern suburban estates and semi-rural properties. Each comes with its own considerations for solar.

Terraced houses

The Cityside has streets of Victorian and Edwardian terraces, particularly around the city centre, the Bogside, and the Strand Road area. Many of these have narrower roofs than the wider Victorian terraces found in Belfast, which means they typically suit smaller systems of 2kW to 3kW (5 to 7 panels). However, rear extensions and return roofs can provide additional space.

Key considerations for Derry terraces include chimney stacks (which can cause shading), the orientation of the rear roof, and whether the property is in or near the conservation area around the historic city walls. An east or west-facing system produces around 80 to 85% of the output of a south-facing array, which is still a worthwhile investment. For more on this topic, see our guide on roof orientation and solar panels.

For a full breakdown of what works on terraced houses, read our terraced house solar guide.

Semi-detached houses

Semi-detached houses are common across both the Waterside and Cityside, particularly in the estates built from the 1950s through to the 1980s. These include areas like Rosemount, Creggan, the Waterside suburbs, and Galliagh. Semi-detached homes typically offer more roof space than terraces, and most can accommodate a 4kW system (10 to 12 panels) comfortably on one roof face.

The 4kW system is the most popular choice for Derry semis, costing £6,000 to £8,500 and saving £630 to £660 per year. This gives a payback period of roughly 9 to 14 years.

Detached houses

Detached properties in Derry’s outer suburbs and surrounding villages (Culmore, Eglinton, Drumahoe, Strathfoyle) typically have the most roof space and can accommodate larger systems of 5kW to 6kW. These larger systems generate more electricity and deliver higher annual savings, though the upfront cost is also higher.

If you have a large south-facing roof and high electricity usage, a 6kW system with battery storage can be a particularly strong investment, reducing your grid dependence significantly.

Bungalows

Derry and the surrounding area have a good number of bungalows, particularly in the semi-rural parts of the Waterside and out towards Eglinton and Drumahoe. Bungalows often have extensive roof area relative to floor space, making them excellent candidates for solar. The lower roof height also reduces scaffolding requirements and can slightly lower installation costs. See our bungalow solar guide for more detail.

New builds

New housing developments across the Derry area are increasingly being built with energy efficiency in mind, though solar panels are not yet standard on most new builds. If you are buying a new build without solar, it is worth asking the developer about adding panels before completion, as it is often cheaper during construction than as a retrofit. Our guide on solar panels for new builds covers what to look for.

Best Areas for Solar in Derry

Solar potential varies across the city depending on prevailing housing types, roof orientations, and local conditions. Here is an area-by-area breakdown.

Waterside (BT47)

The Waterside covers the east bank of the Foyle and includes a broad mix of housing. There are suburban estates of semi-detached and detached houses, many built from the 1960s onwards, with good roof access and generally less shading than the more built-up Cityside. Properties along Clooney Road, Irish Street, and the Drumahoe Road tend to have straightforward roof geometries that work well with solar. The mix of property sizes means systems from 3.5kW to 6kW are common. The Waterside is one of the best parts of the city for solar installations.

Cityside (BT48)

The Cityside includes the historic city centre, the Bogside, Brandywell, and areas stretching out towards Pennyburn and Rosemount. Victorian terraces in and around the city centre tend to have narrower roofs, but rear-facing installations of 2.5 to 3.5kW still work well. The wider streets in Rosemount and the Bishop Street area offer better roof access. Further out, the semi-detached estates in areas like Shantallow and Carnhill have good solar potential with standard 4kW systems.

Culmore and Strathfoyle

These suburban areas to the north of the city have a good proportion of newer builds and semi-detached properties with modern roof designs. Roofs are generally well-oriented, with less shading from mature trees compared to some older parts of the city. System sizes of 4kW to 5kW are typical, and the newer roof structures make for straightforward installations.

Eglinton and Drumahoe

To the east of Derry, these semi-rural villages have a higher proportion of detached houses and bungalows with generous roof space. Properties here are excellent candidates for larger systems (5kW to 6kW) and often have the space for ground-mounted systems as well. The more open landscape means less shading and better overall solar exposure. If you are in this area and have a large south-facing roof, solar is one of the best home investments you can make.

Creggan and Galliagh

These areas have a mix of social and private housing, including terraced houses and semi-detached estates. Many properties here are well suited to standard 3.5kW to 4kW systems. Importantly, households in Creggan and Galliagh may have higher eligibility for the Affordable Warmth Scheme due to above-average rates of fuel poverty in the area. If you are on qualifying benefits or a low income, it is worth checking what insulation and heating support you can access, though it will not fund the panels themselves. See our Affordable Warmth Scheme guide for eligibility details.

Planning Permission in Derry

Most solar panel installations in Derry do not require planning permission. Domestic rooftop solar panels fall under permitted development rights in Northern Ireland, provided the panels do not project more than 200mm from the roof surface and do not extend above the ridge line.

However, Derry has some areas where additional checks are needed.

Conservation areas

Derry’s historic city walls are a scheduled monument, and the area in and around the walls has conservation area designations. The Fountain estate, parts of the Diamond area, and streets immediately inside and adjacent to the walls may be subject to additional planning restrictions. If your property is in a conservation area, panels visible from a public road may require planning permission.

The practical solution is usually to install panels on the rear roof face where they are not visible from the street. Most installers working in the Derry area are familiar with these restrictions and will advise during the survey stage.

Listed buildings

Derry has a number of listed buildings, particularly in the historic core and along some of the grander terraces. If your home is listed (any grade), you will need both planning permission and listed building consent before installing solar panels. Contact Derry City and Strabane District Council’s planning department before proceeding.

Apartments and flats

If you live in an apartment or flat, you will need permission from the management company or freeholder before installing panels. In practice, solar panels on individual apartments are uncommon, though some developments may eventually adopt communal solar arrays on shared roof space.

For the full rules on permitted development, see our solar panel planning permission guide.

NIE Networks: Grid Connection in Derry

All grid-connected solar panel systems in Northern Ireland require notification to NIE Networks (Northern Ireland Electricity Networks), the distribution network operator. Your installer handles this as part of the installation process, but it is worth understanding how it works.

G98 notification (systems up to 3.68kW)

For smaller systems (up to 3.68kW per phase), your installer submits a simple G98 notification to NIE Networks. This is a straightforward process that does not usually cause delays. Most terraced house systems in Derry fall into this category.

G99 application (systems above 3.68kW)

Larger systems require a G99 application, which involves NIE Networks assessing whether the local grid can handle the additional generation. In most parts of urban Derry, this is approved without issue. However, for properties in more rural parts of the council area (towards Strabane, Park, or the Sperrins), the local grid may have less spare capacity, which can occasionally cause delays. The G99 process can take 6 to 12 weeks, so factor this into your timeline if you are planning a larger installation.

Export payments

Once your system is connected and registered, you can earn income by exporting surplus electricity to the grid. The Smart Export Guarantee is Great Britain legislation and does not cover Northern Ireland, but NI suppliers offer voluntary export tariffs at their own rates. Power NI pays 11.88p per kWh for export (tariff year 1 October 2026 to 30 September 2027; the rate resets each October, see solar export payments). The savings table above uses 11.88p. Your installer should register your system with the MCS and help you sign up for an export tariff.

Grants and Financial Support for Derry Homeowners

There is no Derry-specific solar panel grant in 2026, but several UK-wide and Northern Ireland schemes can reduce your costs. Derry homeowners may actually be better placed than many other parts of NI to benefit from some of these schemes.

0% VAT

All domestic solar panel installations in the UK benefit from 0% VAT, confirmed until at least March 2027. This saves around £1,200 to £2,000 compared to the standard 20% rate. The zero rate applies to panels, inverters, batteries, and installation labour. You do not need to apply; the installer simply charges 0% VAT.

Affordable Warmth Scheme

The Affordable Warmth Scheme (delivered by the Housing Executive) is the main government-backed energy efficiency programme in Northern Ireland. It funds insulation and heating measures for eligible households, but it does not cover solar panels. Eligibility is based on income, benefits received, and the energy efficiency of your property.

Derry has higher rates of fuel poverty than the Northern Ireland average. According to NIHE data, parts of the Cityside and areas like Creggan, Galliagh, and the Bogside have particularly high fuel poverty rates. This means a greater proportion of Derry households may qualify for support under the Affordable Warmth Scheme compared to other parts of NI. If you are on qualifying benefits or a low income, checking your eligibility should be your first step before getting quotes.

The scheme is administered by NIHE (Northern Ireland Housing Executive) and has helped thousands of NI households improve their home energy performance. For full details on eligibility and how to apply, see our Affordable Warmth Scheme guide.

NISEP (Northern Ireland Sustainable Energy Programme)

NISEP provides funding through energy suppliers for energy efficiency measures in homes. Almost all of it goes on insulation and heating. The one exception in 2026/27 is NISEP’s Toasty Homes scheme, which can include solar panels for owner-occupiers on under £28,000 (single) or £35,000 (couple) whose heating is missing, solid fuel or an oil or LPG boiler over 15 years old, and its delivery partner says that funding is already fully allocated. The details are on the solar panel grants page.

Solar panel finance

If you do not qualify for grants but want to avoid paying the full cost upfront, many installers offer finance plans over 5 to 10 years. In many cases, the monthly repayment is lower than the electricity savings, making the system cash-flow positive from day one. See our solar panel finance options guide for more detail.

For a full overview of every available scheme, see our solar panel grants guide.

Choosing a Solar Installer in Derry

Finding the right installer is important everywhere, but it matters even more in Derry. The northwest has fewer MCS certified installers based locally compared to the Belfast area, which means there is less natural competition to keep prices keen. Some Belfast-based and mid-Ulster installers cover the Derry area, and including them in your quote comparisons can help ensure you get a fair price.

What to look for

MCS certification is essential. This confirms the installer meets recognised quality standards and is a requirement for export payments and manufacturer warranties. Never use an uncertified installer, regardless of how much cheaper they quote.

Local experience matters. An installer who has worked on Derry properties will be familiar with the common roof types, conservation area requirements, and any local grid considerations. Ask for examples of previous installations in the area.

Reviews and references. Check Google reviews, Trustpilot, and ask the installer for references from previous customers in the northwest. A reputable company will be happy to provide these.

Detailed, written quotes. A good quote should specify the exact panels and inverter being used, the number of panels, the expected annual generation, what is included (scaffolding, DNO notification, MCS registration), and the total cost. Be wary of vague quotes or verbal estimates.

Travel and logistics. If your installer is travelling from Belfast or further afield, check whether travel costs are included in the quote. Most reputable companies include all costs in their quoted price, but it is worth confirming.

For a full checklist of what to look for, read our guide on choosing a solar installer in NI.

Getting quotes

We recommend getting at least three quotes from different MCS certified installers. This lets you compare prices, equipment, and customer service. Quotes for the same system routinely differ by more than £1,000, and comparing also helps you spot any outliers (unusually high or unusually low prices, which both warrant further investigation).

Get free, no-obligation quotes from trusted installers covering the Derry area through our comparison service.

Is It Worth Getting Solar Panels in Derry?

For most Derry homeowners, the answer is yes. While the northwest receives slightly less sunshine than the east of Northern Ireland, the difference in annual generation is modest (roughly 5 to 10%), and the financial case remains strong. Northern Ireland’s relatively high electricity costs, combined with 0% VAT and the potential for 0% VAT, makes solar a sound investment.

A typical Derry household installing a 4kW system at £7,000 can expect to save around £630 to £660 per year. That is a payback period of about 11 years without a battery. A battery adds about £177 a year in savings and £3,000 to £5,000 to the cost, which puts payback with one at roughly 12 to 15 years. After payback, you benefit from free electricity for the remaining 15+ years of the panel lifespan.

Beyond the finances, there are other reasons Derry homeowners choose solar. Electricity prices in Northern Ireland have risen consistently over the past five years, and generating your own power provides a hedge against future increases. Solar panels also improve your home’s EPC rating, which can add value when selling. And for households with electric vehicles, charging from solar during the day is significantly cheaper than drawing from the grid.

For households in fuel poverty, pairing Affordable Warmth insulation work with a modest solar system can make a real difference. Cutting heating demand first means a smaller, cheaper solar system does more for you, even though the panels themselves are not grant funded.

For a full analysis of the financial case, see our guide on whether solar panels are worth it in NI.

What to Do Next

If you are a Derry homeowner considering solar panels, the process is straightforward.

Step 1: Understand your roof. Check which direction your main roof faces and how much unobstructed space is available. South-facing is best, but east and west work well too. If you are unsure, any installer will assess this during a free survey.

Step 2: Check your electricity usage. Look at your recent electricity bills to understand your annual consumption. This helps determine the right system size. A household using 3,500 to 4,500 kWh per year (typical for a Derry semi) is well matched to a 4kW system.

Step 3: Check grant eligibility. Before getting quotes, check whether you qualify for the Affordable Warmth Scheme or any current NISEP schemes. Derry has higher rates of fuel poverty than the NI average, so there is a good chance you or someone you know may qualify for support.

Step 4: Compare quotes. Getting at least three quotes from MCS certified installers is the most important step. It ensures you get a competitive price and helps you evaluate different equipment options. Compare free quotes from installers covering the Derry area through our service. It takes two minutes and costs nothing.

Step 5: Choose your installer and schedule. Once you have compared quotes and chosen an installer, the installation itself typically takes just one to two days. From first enquiry to generating electricity, the whole process usually takes 4 to 8 weeks.

Solar panels are one of the best investments a Derry homeowner can make in 2026. With electricity prices continuing to rise and installation costs at their most competitive point in years, the numbers speak for themselves. The sooner you install, the sooner you start saving.