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Solar panel cost in Causeway Coast and Glens (BT51)

See realistic solar installation costs, savings and payback for BT51 (Causeway Coast and Glens) 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
31.5 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£310
What you save every year
Profit Over 25 Years
£-2,022
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 860 kWh/kW — 130 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 860 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)
860 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: £258, Upfront: £8,139, Break-even: 31.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 688 kWh 1033 kWh £0 £103 £103 £3,256 31.5 yrs £-1,190
3 kW 2582 kWh 1033 kWh 1549 kWh £0 £155 £155 £4,883 31.5 yrs £-1,785
4 kW 3442 kWh 1377 kWh 2065 kWh £0 £207 £207 £6,511 31.5 yrs £-2,381
5 kW 4302 kWh 1721 kWh 2582 kWh £0 £258 £258 £8,139 31.5 yrs £-2,976
6 kW 5163 kWh 2065 kWh 3098 kWh £0 £310 £310 £9,767 31.5 yrs £-3,571
7 kW 6024 kWh 2409 kWh 3614 kWh £0 £361 £361 £11,394 31.5 yrs £-4,166
8 kW 6884 kWh 2754 kWh 4130 kWh £0 £413 £413 £13,022 31.5 yrs £-4,761

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: £172, Upfront: £10,239, Break-even: 59.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1033 kWh 688 kWh £0 £69 £69 £5,356 77.8 yrs £-3,979
3 kW 2582 kWh 1549 kWh 1033 kWh £0 £103 £103 £6,983 67.6 yrs £-4,918
4 kW 3442 kWh 2065 kWh 1377 kWh £0 £138 £138 £8,611 62.5 yrs £-5,857
5 kW 4302 kWh 2582 kWh 1721 kWh £0 £172 £172 £10,239 59.5 yrs £-6,797
6 kW 5163 kWh 3098 kWh 2065 kWh £0 £207 £207 £11,867 57.5 yrs £-7,736
7 kW 6024 kWh 3614 kWh 2409 kWh £0 £241 £241 £13,494 56.0 yrs £-8,676
8 kW 6884 kWh 4130 kWh 2754 kWh £0 £275 £275 £15,122 54.9 yrs £-9,615

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: £129, Upfront: £11,639, Break-even: 90.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1205 kWh 516 kWh £0 £52 £52 £6,756 130.8 yrs £-5,723
3 kW 2582 kWh 1807 kWh 774 kWh £0 £77 £77 £8,383 108.2 yrs £-6,834
4 kW 3442 kWh 2409 kWh 1033 kWh £0 £103 £103 £10,011 96.9 yrs £-7,946
5 kW 4302 kWh 3012 kWh 1291 kWh £0 £129 £129 £11,639 90.2 yrs £-9,057
6 kW 5163 kWh 3614 kWh 1549 kWh £0 £155 £155 £13,267 85.7 yrs £-10,169
7 kW 6024 kWh 4216 kWh 1807 kWh £0 £181 £181 £14,894 82.4 yrs £-11,280
8 kW 6884 kWh 4819 kWh 2065 kWh £0 £207 £207 £16,522 80.0 yrs £-12,392

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: £116, Upfront: £13,389, Break-even: 115.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1256 kWh 465 kWh £0 £46 £46 £8,506 183.0 yrs £-7,576
3 kW 2582 kWh 1884 kWh 697 kWh £0 £70 £70 £10,133 145.4 yrs £-8,739
4 kW 3442 kWh 2513 kWh 929 kWh £0 £93 £93 £11,761 126.6 yrs £-9,902
5 kW 4302 kWh 3141 kWh 1162 kWh £0 £116 £116 £13,389 115.3 yrs £-11,065
6 kW 5163 kWh 3769 kWh 1394 kWh £0 £139 £139 £15,017 107.7 yrs £-12,229
7 kW 6024 kWh 4397 kWh 1626 kWh £0 £163 £163 £16,644 102.3 yrs £-13,392
8 kW 6884 kWh 5025 kWh 1859 kWh £0 £186 £186 £18,272 98.3 yrs £-14,555

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: £108, Upfront: £15,139, Break-even: 140.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1291 kWh 430 kWh £0 £43 £43 £10,256 238.4 yrs £-9,395
3 kW 2582 kWh 1936 kWh 645 kWh £0 £65 £65 £11,883 184.1 yrs £-10,593
4 kW 3442 kWh 2582 kWh 860 kWh £0 £86 £86 £13,511 157.0 yrs £-11,790
5 kW 4302 kWh 3227 kWh 1076 kWh £0 £108 £108 £15,139 140.7 yrs £-12,988
6 kW 5163 kWh 3872 kWh 1291 kWh £0 £129 £129 £16,767 129.9 yrs £-14,185
7 kW 6024 kWh 4518 kWh 1506 kWh £0 £151 £151 £18,394 122.2 yrs £-15,383
8 kW 6884 kWh 5163 kWh 1721 kWh £0 £172 £172 £20,022 116.3 yrs £-16,580

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: £99, Upfront: £17,589, Break-even: 177.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1325 kWh 396 kWh £0 £40 £40 £12,706 321.0 yrs £-11,914
3 kW 2582 kWh 1988 kWh 594 kWh £0 £59 £59 £14,333 241.4 yrs £-13,146
4 kW 3442 kWh 2650 kWh 792 kWh £0 £79 £79 £15,961 201.6 yrs £-14,378
5 kW 4302 kWh 3313 kWh 990 kWh £0 £99 £99 £17,589 177.7 yrs £-15,610
6 kW 5163 kWh 3976 kWh 1187 kWh £0 £119 £119 £19,217 161.8 yrs £-16,842
7 kW 6024 kWh 4638 kWh 1385 kWh £0 £139 £139 £20,844 150.5 yrs £-18,074
8 kW 6884 kWh 5301 kWh 1583 kWh £0 £158 £158 £22,472 141.9 yrs £-19,305

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 Causeway Coast and Glens

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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Insights for BT51

Figures below are tailored to BT51 — click through for full league tables.

Aspect Penalty View ranking →
East −20.2% West −20.3%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BT51

Monthly generation per kilowatt of solar panels

kWh 25 Jan 44 Feb 78 Mar 107 Apr 121 May 111 Jun 105 Jul 94 Aug 74 Sep 52 Oct 32 Nov 19 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 40.8% 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 29 kWh per month; the average month produces around 72 kWh. So a typical 4 kW home system would generate roughly 117 kWh in winter, or 287 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
860kWh/kW
A 1 kW system generates ~860 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

Causeway Coast and Glens (96%)|Mid Ulster (4%)

Areas Covered

Kilrea, Aghadowey, Macosquin, Castlerock, Waterside, Garvagh, Churchland, Valley + 3 more

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

BT52 (Causeway Coast and Glens)
≈4.5 km away
Local sunshine: ~861 kWh/kWp · +0% vs BT51
BT55 (Causeway Coast and Glens)
≈9.7 km away
Local sunshine: ~854 kWh/kWp · -1% vs BT51
BT53 (Causeway Coast and Glens)
≈11.5 km away
Local sunshine: ~842 kWh/kWp · -2% vs BT51
BT56 (Causeway Coast and Glens)
≈11.6 km away
Local sunshine: ~849 kWh/kWp · -1% vs BT51
BT57 (Causeway Coast and Glens)
≈16.0 km away
Local sunshine: ~866 kWh/kWp · +1% vs BT51
BT49 (Causeway Coast and Glens)
≈17.6 km away
Local sunshine: ~846 kWh/kWp · -2% vs BT51

Similar sunshine across the UK

SK7 (Stockport)
~861 kWh/kWp · +0% vs BT51
IV19 (Highland)
~860 kWh/kWp · -0% vs BT51
HS8 (Na h-Eileanan Siar)
~861 kWh/kWp · +0% vs BT51