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Solar panel cost in Causeway Coast and Glens (BT55)

See realistic solar installation costs, savings and payback for BT55 (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
31.8 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£308
What you save every year
Profit Over 25 Years
£-2,078
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 854 kWh/kW — 136 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 854 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)
854 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: £256, Upfront: £8,139, Break-even: 31.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 683 kWh 1025 kWh £0 £103 £103 £3,256 31.8 yrs £-1,205
3 kW 2563 kWh 1025 kWh 1538 kWh £0 £154 £154 £4,883 31.8 yrs £-1,808
4 kW 3417 kWh 1367 kWh 2050 kWh £0 £205 £205 £6,511 31.8 yrs £-2,410
5 kW 4272 kWh 1709 kWh 2563 kWh £0 £256 £256 £8,139 31.8 yrs £-3,013
6 kW 5126 kWh 2050 kWh 3076 kWh £0 £308 £308 £9,767 31.8 yrs £-3,615
7 kW 5980 kWh 2392 kWh 3588 kWh £0 £359 £359 £11,394 31.8 yrs £-4,218
8 kW 6835 kWh 2734 kWh 4101 kWh £0 £410 £410 £13,022 31.8 yrs £-4,821

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: £171, Upfront: £10,239, Break-even: 59.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 1025 kWh 683 kWh £0 £68 £68 £5,356 78.4 yrs £-3,989
3 kW 2563 kWh 1538 kWh 1025 kWh £0 £103 £103 £6,983 68.1 yrs £-4,933
4 kW 3417 kWh 2050 kWh 1367 kWh £0 £137 £137 £8,611 63.0 yrs £-5,877
5 kW 4272 kWh 2563 kWh 1709 kWh £0 £171 £171 £10,239 59.9 yrs £-6,821
6 kW 5126 kWh 3076 kWh 2050 kWh £0 £205 £205 £11,867 57.9 yrs £-7,766
7 kW 5980 kWh 3588 kWh 2392 kWh £0 £239 £239 £13,494 56.4 yrs £-8,710
8 kW 6835 kWh 4101 kWh 2734 kWh £0 £273 £273 £15,122 55.3 yrs £-9,654

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: £128, Upfront: £11,639, Break-even: 90.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 1196 kWh 513 kWh £0 £51 £51 £6,756 131.8 yrs £-5,730
3 kW 2563 kWh 1794 kWh 769 kWh £0 £77 £77 £8,383 109.0 yrs £-6,845
4 kW 3417 kWh 2392 kWh 1025 kWh £0 £103 £103 £10,011 97.7 yrs £-7,961
5 kW 4272 kWh 2990 kWh 1281 kWh £0 £128 £128 £11,639 90.8 yrs £-9,076
6 kW 5126 kWh 3588 kWh 1538 kWh £0 £154 £154 £13,267 86.3 yrs £-10,191
7 kW 5980 kWh 4186 kWh 1794 kWh £0 £179 £179 £14,894 83.0 yrs £-11,306
8 kW 6835 kWh 4784 kWh 2050 kWh £0 £205 £205 £16,522 80.6 yrs £-12,421

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: £115, Upfront: £13,389, Break-even: 116.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 1247 kWh 461 kWh £0 £46 £46 £8,506 184.4 yrs £-7,583
3 kW 2563 kWh 1871 kWh 692 kWh £0 £69 £69 £10,133 146.4 yrs £-8,749
4 kW 3417 kWh 2495 kWh 923 kWh £0 £92 £92 £11,761 127.5 yrs £-9,916
5 kW 4272 kWh 3118 kWh 1153 kWh £0 £115 £115 £13,389 116.1 yrs £-11,082
6 kW 5126 kWh 3742 kWh 1384 kWh £0 £138 £138 £15,017 108.5 yrs £-12,249
7 kW 5980 kWh 4366 kWh 1615 kWh £0 £161 £161 £16,644 103.1 yrs £-13,415
8 kW 6835 kWh 4989 kWh 1845 kWh £0 £185 £185 £18,272 99.0 yrs £-14,581

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: £107, Upfront: £15,139, Break-even: 141.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 1281 kWh 427 kWh £0 £43 £43 £10,256 240.1 yrs £-9,401
3 kW 2563 kWh 1922 kWh 641 kWh £0 £64 £64 £11,883 185.5 yrs £-10,602
4 kW 3417 kWh 2563 kWh 854 kWh £0 £85 £85 £13,511 158.1 yrs £-11,802
5 kW 4272 kWh 3204 kWh 1068 kWh £0 £107 £107 £15,139 141.8 yrs £-13,003
6 kW 5126 kWh 3844 kWh 1281 kWh £0 £128 £128 £16,767 130.8 yrs £-14,204
7 kW 5980 kWh 4485 kWh 1495 kWh £0 £150 £150 £18,394 123.0 yrs £-15,404
8 kW 6835 kWh 5126 kWh 1709 kWh £0 £171 £171 £20,022 117.2 yrs £-16,605

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: £98, Upfront: £17,589, Break-even: 179.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1709 kWh 1316 kWh 393 kWh £0 £39 £39 £12,706 323.3 yrs £-11,920
3 kW 2563 kWh 1974 kWh 589 kWh £0 £59 £59 £14,333 243.1 yrs £-13,154
4 kW 3417 kWh 2631 kWh 786 kWh £0 £79 £79 £15,961 203.1 yrs £-14,389
5 kW 4272 kWh 3289 kWh 982 kWh £0 £98 £98 £17,589 179.0 yrs £-15,624
6 kW 5126 kWh 3947 kWh 1179 kWh £0 £118 £118 £19,217 163.0 yrs £-16,859
7 kW 5980 kWh 4605 kWh 1375 kWh £0 £138 £138 £20,844 151.5 yrs £-18,093
8 kW 6835 kWh 5263 kWh 1572 kWh £0 £157 £157 £22,472 143.0 yrs £-19,328

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 BT55

Figures below are tailored to BT55 — click through for full league tables.

Aspect Penalty View ranking →
East −20.2% West −20.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BT55

Monthly generation per kilowatt of solar panels

kWh 25 Jan 44 Feb 77 Mar 106 Apr 119 May 110 Jun 104 Jul 94 Aug 73 Sep 52 Oct 32 Nov 19 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 40.9% 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 71 kWh. So a typical 4 kW home system would generate roughly 116 kWh in winter, or 285 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
854kWh/kW
A 1 kW system generates ~854 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 (100%)

Areas Covered

Portstewart, Atlantic, Dundooan

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

BT56 (Causeway Coast and Glens)
≈4.1 km away
Local sunshine: ~849 kWh/kWp · -1% vs BT55
BT52 (Causeway Coast and Glens)
≈6.1 km away
Local sunshine: ~861 kWh/kWp · +1% vs BT55
BT51 (Causeway Coast and Glens)
≈9.7 km away
Local sunshine: ~860 kWh/kWp · +1% vs BT55
BT57 (Causeway Coast and Glens)
≈12.0 km away
Local sunshine: ~866 kWh/kWp · +1% vs BT55
BT53 (Causeway Coast and Glens)
≈17.5 km away
Local sunshine: ~842 kWh/kWp · -1% vs BT55
BT49 (Causeway Coast and Glens)
≈21.2 km away
Local sunshine: ~846 kWh/kWp · -1% vs BT55

Similar sunshine across the UK

CA5 (Cumberland)
~854 kWh/kWp · +0% vs BT55
BB7 (Ribble Valley)
~854 kWh/kWp · +0% vs BT55
FK5 (Falkirk)
~855 kWh/kWp · +0% vs BT55