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Solar Panels in BT51 (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
39.4 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£310
What you save every year
Profit Over 25 Years
£-4,463
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 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: £10,173, Break-even: 39.4 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 £4,069 39.4 yrs £-2,004
3 kW 2582 kWh 1033 kWh 1549 kWh £0 £155 £155 £6,104 39.4 yrs £-3,006
4 kW 3442 kWh 1377 kWh 2065 kWh £0 £207 £207 £8,138 39.4 yrs £-4,008
5 kW 4302 kWh 1721 kWh 2582 kWh £0 £258 £258 £10,173 39.4 yrs £-5,010
6 kW 5163 kWh 2065 kWh 3098 kWh £0 £310 £310 £12,207 39.4 yrs £-6,011
7 kW 6024 kWh 2409 kWh 3614 kWh £0 £361 £361 £14,242 39.4 yrs £-7,013
8 kW 6884 kWh 2754 kWh 4130 kWh £0 £413 £413 £16,276 39.4 yrs £-8,015

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: £172, Upfront: £12,273, Break-even: 71.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1033 kWh 688 kWh £0 £69 £69 £6,169 89.6 yrs £-4,792
3 kW 2582 kWh 1549 kWh 1033 kWh £0 £103 £103 £8,204 79.4 yrs £-6,138
4 kW 3442 kWh 2065 kWh 1377 kWh £0 £138 £138 £10,238 74.4 yrs £-7,484
5 kW 4302 kWh 2582 kWh 1721 kWh £0 £172 £172 £12,273 71.3 yrs £-8,831
6 kW 5163 kWh 3098 kWh 2065 kWh £0 £207 £207 £14,307 69.3 yrs £-10,177
7 kW 6024 kWh 3614 kWh 2409 kWh £0 £241 £241 £16,342 67.8 yrs £-11,523
8 kW 6884 kWh 4130 kWh 2754 kWh £0 £275 £275 £18,376 66.7 yrs £-12,869

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: £129, Upfront: £13,673, Break-even: 105.9 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 £7,569 146.6 yrs £-6,536
3 kW 2582 kWh 1807 kWh 774 kWh £0 £77 £77 £9,604 124.0 yrs £-8,055
4 kW 3442 kWh 2409 kWh 1033 kWh £0 £103 £103 £11,638 112.7 yrs £-9,573
5 kW 4302 kWh 3012 kWh 1291 kWh £0 £129 £129 £13,673 105.9 yrs £-11,091
6 kW 5163 kWh 3614 kWh 1549 kWh £0 £155 £155 £15,707 101.4 yrs £-12,609
7 kW 6024 kWh 4216 kWh 1807 kWh £0 £181 £181 £17,742 98.2 yrs £-14,127
8 kW 6884 kWh 4819 kWh 2065 kWh £0 £207 £207 £19,776 95.8 yrs £-15,646

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: £116, Upfront: £15,423, Break-even: 132.8 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 £9,319 200.6 yrs £-8,390
3 kW 2582 kWh 1884 kWh 697 kWh £0 £70 £70 £11,354 162.9 yrs £-9,960
4 kW 3442 kWh 2513 kWh 929 kWh £0 £93 £93 £13,388 144.1 yrs £-11,529
5 kW 4302 kWh 3141 kWh 1162 kWh £0 £116 £116 £15,423 132.8 yrs £-13,099
6 kW 5163 kWh 3769 kWh 1394 kWh £0 £139 £139 £17,457 125.2 yrs £-14,669
7 kW 6024 kWh 4397 kWh 1626 kWh £0 £163 £163 £19,492 119.8 yrs £-16,239
8 kW 6884 kWh 5025 kWh 1859 kWh £0 £186 £186 £21,526 115.8 yrs £-17,809

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: £108, Upfront: £17,173, Break-even: 159.7 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 £11,069 257.3 yrs £-10,209
3 kW 2582 kWh 1936 kWh 645 kWh £0 £65 £65 £13,104 203.0 yrs £-11,813
4 kW 3442 kWh 2582 kWh 860 kWh £0 £86 £86 £15,138 175.9 yrs £-13,417
5 kW 4302 kWh 3227 kWh 1076 kWh £0 £108 £108 £17,173 159.7 yrs £-15,021
6 kW 5163 kWh 3872 kWh 1291 kWh £0 £129 £129 £19,207 148.8 yrs £-16,626
7 kW 6024 kWh 4518 kWh 1506 kWh £0 £151 £151 £21,242 141.1 yrs £-18,230
8 kW 6884 kWh 5163 kWh 1721 kWh £0 £172 £172 £23,276 135.2 yrs £-19,834

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: £99, Upfront: £19,623, Break-even: 198.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1325 kWh 396 kWh £0 £40 £40 £13,519 341.5 yrs £-12,727
3 kW 2582 kWh 1988 kWh 594 kWh £0 £59 £59 £15,554 262.0 yrs £-14,366
4 kW 3442 kWh 2650 kWh 792 kWh £0 £79 £79 £17,588 222.2 yrs £-16,005
5 kW 4302 kWh 3313 kWh 990 kWh £0 £99 £99 £19,623 198.3 yrs £-17,643
6 kW 5163 kWh 3976 kWh 1187 kWh £0 £119 £119 £21,657 182.4 yrs £-19,282
7 kW 6024 kWh 4638 kWh 1385 kWh £0 £139 £139 £23,692 171.0 yrs £-20,921
8 kW 6884 kWh 5301 kWh 1583 kWh £0 £158 £158 £25,726 162.5 yrs £-22,559

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
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, 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

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