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Solar panel cost in Newry, Mourne and Down (BT31)

See realistic solar installation costs, savings and payback for BT31 (Newry, Mourne and Down) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
29.6 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£330
What you save every year
Profit Over 25 Years
£-1,521
After paying itself off, you're this much ahead

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How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

In Northern Ireland, the current unit rate is 0.00p/kWh with a 0.00p/day standing charge. Your postcode’s south-facing sunshine yield is 916 kWh/kW — 74 below the regional median (991).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 916 kWh per year on a south-facing roof. We value self-used electricity at 0.0p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
0.0p/kWh
Standing charge
0.0p/day
Sunshine yield (south)
916 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £275, Upfront: £8,139, Break-even: 29.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 733 kWh 1099 kWh £0 £110 £110 £3,256 29.6 yrs £-1,057
3 kW 2748 kWh 1099 kWh 1649 kWh £0 £165 £165 £4,883 29.6 yrs £-1,585
4 kW 3665 kWh 1466 kWh 2199 kWh £0 £220 £220 £6,511 29.6 yrs £-2,114
5 kW 4581 kWh 1832 kWh 2748 kWh £0 £275 £275 £8,139 29.6 yrs £-2,642
6 kW 5497 kWh 2199 kWh 3298 kWh £0 £330 £330 £9,767 29.6 yrs £-3,170
7 kW 6413 kWh 2565 kWh 3848 kWh £0 £385 £385 £11,394 29.6 yrs £-3,699
8 kW 7329 kWh 2932 kWh 4398 kWh £0 £440 £440 £13,022 29.6 yrs £-4,227

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £183, Upfront: £10,239, Break-even: 55.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 1099 kWh 733 kWh £0 £73 £73 £5,356 73.1 yrs £-3,890
3 kW 2748 kWh 1649 kWh 1099 kWh £0 £110 £110 £6,983 63.5 yrs £-4,785
4 kW 3665 kWh 2199 kWh 1466 kWh £0 £147 £147 £8,611 58.7 yrs £-5,679
5 kW 4581 kWh 2748 kWh 1832 kWh £0 £183 £183 £10,239 55.9 yrs £-6,574
6 kW 5497 kWh 3298 kWh 2199 kWh £0 £220 £220 £11,867 54.0 yrs £-7,469
7 kW 6413 kWh 3848 kWh 2565 kWh £0 £257 £257 £13,494 52.6 yrs £-8,364
8 kW 7329 kWh 4398 kWh 2932 kWh £0 £293 £293 £15,122 51.6 yrs £-9,259

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £137, Upfront: £11,639, Break-even: 84.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 1283 kWh 550 kWh £0 £55 £55 £6,756 122.9 yrs £-5,656
3 kW 2748 kWh 1924 kWh 825 kWh £0 £82 £82 £8,383 101.7 yrs £-6,734
4 kW 3665 kWh 2565 kWh 1099 kWh £0 £110 £110 £10,011 91.1 yrs £-7,812
5 kW 4581 kWh 3207 kWh 1374 kWh £0 £137 £137 £11,639 84.7 yrs £-8,890
6 kW 5497 kWh 3848 kWh 1649 kWh £0 £165 £165 £13,267 80.4 yrs £-9,968
7 kW 6413 kWh 4489 kWh 1924 kWh £0 £192 £192 £14,894 77.4 yrs £-11,046
8 kW 7329 kWh 5130 kWh 2199 kWh £0 £220 £220 £16,522 75.1 yrs £-12,125

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £124, Upfront: £13,389, Break-even: 108.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 1338 kWh 495 kWh £0 £49 £49 £8,506 171.9 yrs £-7,516
3 kW 2748 kWh 2006 kWh 742 kWh £0 £74 £74 £10,133 136.6 yrs £-8,649
4 kW 3665 kWh 2675 kWh 989 kWh £0 £99 £99 £11,761 118.9 yrs £-9,782
5 kW 4581 kWh 3344 kWh 1237 kWh £0 £124 £124 £13,389 108.3 yrs £-10,915
6 kW 5497 kWh 4013 kWh 1484 kWh £0 £148 £148 £15,017 101.2 yrs £-12,048
7 kW 6413 kWh 4682 kWh 1732 kWh £0 £173 £173 £16,644 96.1 yrs £-13,181
8 kW 7329 kWh 5350 kWh 1979 kWh £0 £198 £198 £18,272 92.3 yrs £-14,314

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £115, Upfront: £15,139, Break-even: 132.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 1374 kWh 458 kWh £0 £46 £46 £10,256 223.9 yrs £-9,339
3 kW 2748 kWh 2061 kWh 687 kWh £0 £69 £69 £11,883 172.9 yrs £-10,509
4 kW 3665 kWh 2748 kWh 916 kWh £0 £92 £92 £13,511 147.5 yrs £-11,679
5 kW 4581 kWh 3436 kWh 1145 kWh £0 £115 £115 £15,139 132.2 yrs £-12,848
6 kW 5497 kWh 4123 kWh 1374 kWh £0 £137 £137 £16,767 122.0 yrs £-14,018
7 kW 6413 kWh 4810 kWh 1603 kWh £0 £160 £160 £18,394 114.7 yrs £-15,188
8 kW 7329 kWh 5497 kWh 1832 kWh £0 £183 £183 £20,022 109.3 yrs £-16,357

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £105, Upfront: £17,589, Break-even: 166.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1832 kWh 1411 kWh 421 kWh £0 £42 £42 £12,706 301.5 yrs £-11,863
3 kW 2748 kWh 2116 kWh 632 kWh £0 £63 £63 £14,333 226.7 yrs £-13,069
4 kW 3665 kWh 2822 kWh 843 kWh £0 £84 £84 £15,961 189.4 yrs £-14,275
5 kW 4581 kWh 3527 kWh 1054 kWh £0 £105 £105 £17,589 166.9 yrs £-15,482
6 kW 5497 kWh 4233 kWh 1264 kWh £0 £126 £126 £19,217 152.0 yrs £-16,688
7 kW 6413 kWh 4938 kWh 1475 kWh £0 £148 £148 £20,844 141.3 yrs £-17,894
8 kW 7329 kWh 5643 kWh 1686 kWh £0 £169 £169 £22,472 133.3 yrs £-19,101

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Before you request quotes in Newry, Mourne and Down

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

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Understand DNO, G98 and G99 export limits

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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for BT31

Figures below are tailored to BT31 — click through for full league tables.

Aspect Penalty View ranking →
East −20.8% West −20.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BT31

Monthly generation per kilowatt of solar panels

kWh 28 Jan 46 Feb 81 Mar 106 Apr 122 May 116 Jun 112 Jul 103 Aug 83 Sep 57 Oct 37 Nov 25 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 43.2% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 33 kWh per month; the average month produces around 76 kWh. So a typical 4 kW home system would generate roughly 132 kWh in winter, or 305 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
916kWh/kW
A 1 kW system generates ~916 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

No EPC data available for this outcode

Coverage

Newry, Mourne and Down (90%)|Armagh City, Banbridge and Craigavon (10%)

Areas Covered

Castlewellan, Ballyward, Tollymore, Dundrum, Gransha, Rathfriland, Ballydugan

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap,

Installation costs: DESNZ/MCS data, March 2026 (TIC)

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.

Compare nearby areas

Nearby in Northern Ireland

BT33 (Newry, Mourne and Down)
≈6.5 km away
Local sunshine: ~895 kWh/kWp · -2% vs BT31
BT24 (Newry, Mourne and Down)
≈15.9 km away
Local sunshine: ~917 kWh/kWp · +0% vs BT31
BT30 (Newry, Mourne and Down)
≈16.8 km away
Local sunshine: ~976 kWh/kWp · +6% vs BT31
BT25 (Armagh City, Banbridge and Craigavon)
≈19.8 km away
Local sunshine: ~886 kWh/kWp · -3% vs BT31
BT34 (Newry, Mourne and Down)
≈21.4 km away
Local sunshine: ~898 kWh/kWp · -2% vs BT31
BT32 (Armagh City, Banbridge and Craigavon)
≈22.6 km away
Local sunshine: ~889 kWh/kWp · -3% vs BT31

Similar sunshine across the UK

BD3 (Bradford)
~916 kWh/kWp · -0% vs BT31
ST11 (Staffordshire Moorlands)
~916 kWh/kWp · -0% vs BT31
S1 (Sheffield)
~916 kWh/kWp · +0% vs BT31