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Solar Panels in BT56 (Causeway Coast and Glens)

See if solar pays off for you in Causeway Coast and Glens — price, savings and payback in under a minute (official UK data).

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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
39.9 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£306
What you save every year
Profit Over 25 Years
£-4,566
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 849 kWh/kW — 142 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 849 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)
849 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: £255, Upfront: £10,173, Break-even: 39.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 679 kWh 1019 kWh £0 £102 £102 £4,069 39.9 yrs £-2,032
3 kW 2547 kWh 1019 kWh 1528 kWh £0 £153 £153 £6,104 39.9 yrs £-3,047
4 kW 3396 kWh 1358 kWh 2038 kWh £0 £204 £204 £8,138 39.9 yrs £-4,063
5 kW 4245 kWh 1698 kWh 2547 kWh £0 £255 £255 £10,173 39.9 yrs £-5,079
6 kW 5094 kWh 2038 kWh 3056 kWh £0 £306 £306 £12,207 39.9 yrs £-6,095
7 kW 5943 kWh 2377 kWh 3566 kWh £0 £357 £357 £14,242 39.9 yrs £-7,110
8 kW 6792 kWh 2717 kWh 4075 kWh £0 £408 £408 £16,276 39.9 yrs £-8,126

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £170, Upfront: £12,273, Break-even: 72.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 1019 kWh 679 kWh £0 £68 £68 £6,169 90.8 yrs £-4,811
3 kW 2547 kWh 1528 kWh 1019 kWh £0 £102 £102 £8,204 80.5 yrs £-6,166
4 kW 3396 kWh 2038 kWh 1358 kWh £0 £136 £136 £10,238 75.4 yrs £-7,521
5 kW 4245 kWh 2547 kWh 1698 kWh £0 £170 £170 £12,273 72.3 yrs £-8,877
6 kW 5094 kWh 3056 kWh 2038 kWh £0 £204 £204 £14,307 70.2 yrs £-10,232
7 kW 5943 kWh 3566 kWh 2377 kWh £0 £238 £238 £16,342 68.7 yrs £-11,587
8 kW 6792 kWh 4075 kWh 2717 kWh £0 £272 £272 £18,376 67.6 yrs £-12,943

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £127, Upfront: £13,673, Break-even: 107.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 1189 kWh 509 kWh £0 £51 £51 £7,569 148.6 yrs £-6,550
3 kW 2547 kWh 1783 kWh 764 kWh £0 £76 £76 £9,604 125.7 yrs £-8,075
4 kW 3396 kWh 2377 kWh 1019 kWh £0 £102 £102 £11,638 114.2 yrs £-9,601
5 kW 4245 kWh 2971 kWh 1273 kWh £0 £127 £127 £13,673 107.4 yrs £-11,126
6 kW 5094 kWh 3566 kWh 1528 kWh £0 £153 £153 £15,707 102.8 yrs £-12,651
7 kW 5943 kWh 4160 kWh 1783 kWh £0 £178 £178 £17,742 99.5 yrs £-14,176
8 kW 6792 kWh 4754 kWh 2038 kWh £0 £204 £204 £19,776 97.1 yrs £-15,701

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £115, Upfront: £15,423, Break-even: 134.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 1239 kWh 458 kWh £0 £46 £46 £9,319 203.3 yrs £-8,402
3 kW 2547 kWh 1859 kWh 688 kWh £0 £69 £69 £11,354 165.1 yrs £-9,978
4 kW 3396 kWh 2479 kWh 917 kWh £0 £92 £92 £13,388 146.0 yrs £-11,554
5 kW 4245 kWh 3099 kWh 1146 kWh £0 £115 £115 £15,423 134.6 yrs £-13,130
6 kW 5094 kWh 3718 kWh 1375 kWh £0 £138 £138 £17,457 126.9 yrs £-14,706
7 kW 5943 kWh 4338 kWh 1605 kWh £0 £160 £160 £19,492 121.5 yrs £-16,283
8 kW 6792 kWh 4958 kWh 1834 kWh £0 £183 £183 £21,526 117.4 yrs £-17,859

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £106, Upfront: £17,173, Break-even: 161.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 1273 kWh 424 kWh £0 £42 £42 £11,069 260.8 yrs £-10,220
3 kW 2547 kWh 1910 kWh 637 kWh £0 £64 £64 £13,104 205.8 yrs £-11,830
4 kW 3396 kWh 2547 kWh 849 kWh £0 £85 £85 £15,138 178.3 yrs £-13,440
5 kW 4245 kWh 3184 kWh 1061 kWh £0 £106 £106 £17,173 161.8 yrs £-15,050
6 kW 5094 kWh 3820 kWh 1273 kWh £0 £127 £127 £19,207 150.8 yrs £-16,660
7 kW 5943 kWh 4457 kWh 1486 kWh £0 £149 £149 £21,242 143.0 yrs £-18,270
8 kW 6792 kWh 5094 kWh 1698 kWh £0 £170 £170 £23,276 137.1 yrs £-19,880

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £98, Upfront: £19,623, Break-even: 201.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1698 kWh 1307 kWh 391 kWh £0 £39 £39 £13,519 346.2 yrs £-12,738
3 kW 2547 kWh 1961 kWh 586 kWh £0 £59 £59 £15,554 265.5 yrs £-14,382
4 kW 3396 kWh 2615 kWh 781 kWh £0 £78 £78 £17,588 225.2 yrs £-16,026
5 kW 4245 kWh 3268 kWh 976 kWh £0 £98 £98 £19,623 201.0 yrs £-17,670
6 kW 5094 kWh 3922 kWh 1172 kWh £0 £117 £117 £21,657 184.9 yrs £-19,314
7 kW 5943 kWh 4576 kWh 1367 kWh £0 £137 £137 £23,692 173.3 yrs £-20,958
8 kW 6792 kWh 5230 kWh 1562 kWh £0 £156 £156 £25,726 164.7 yrs £-22,602

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
849kWh/kW
A 1 kW system generates ~849 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

Portrush and Dunluce, Hopefield, Atlantic, Dundooan

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q4 2025

Installation costs: MCS certified installer data, March 2025

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

BT55 (Causeway Coast and Glens)
≈4.1 km away
Local sunshine: ~854 kWh/kWp · +1% vs BT56
BT52 (Causeway Coast and Glens)
≈7.2 km away
Local sunshine: ~861 kWh/kWp · +1% vs BT56
BT57 (Causeway Coast and Glens)
≈8.1 km away
Local sunshine: ~866 kWh/kWp · +2% vs BT56
BT51 (Causeway Coast and Glens)
≈11.6 km away
Local sunshine: ~860 kWh/kWp · +1% vs BT56
BT53 (Causeway Coast and Glens)
≈16.6 km away
Local sunshine: ~842 kWh/kWp · -1% vs BT56
BT54 (Causeway Coast and Glens)
≈25.1 km away
Local sunshine: ~860 kWh/kWp · +1% vs BT56

Similar sunshine across the UK

G72 (South Lanarkshire)
~849 kWh/kWp · -0% vs BT56
BD24 (North Yorkshire)
~849 kWh/kWp · -0% vs BT56
ML3 (South Lanarkshire)
~849 kWh/kWp · -0% vs BT56