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Solar panel cost in Derry City and Strabane (BT82)

See realistic solar installation costs, savings and payback for BT82 (Derry City and Strabane) 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
34.1 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£286
What you save every year
Profit Over 25 Years
£-2,607
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 795 kWh/kW — 195 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 795 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)
795 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: £239, Upfront: £8,139, Break-even: 34.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 636 kWh 955 kWh £0 £95 £95 £3,256 34.1 yrs £-1,346
3 kW 2386 kWh 955 kWh 1432 kWh £0 £143 £143 £4,883 34.1 yrs £-2,020
4 kW 3182 kWh 1273 kWh 1909 kWh £0 £191 £191 £6,511 34.1 yrs £-2,693
5 kW 3977 kWh 1591 kWh 2386 kWh £0 £239 £239 £8,139 34.1 yrs £-3,366
6 kW 4773 kWh 1909 kWh 2864 kWh £0 £286 £286 £9,767 34.1 yrs £-4,039
7 kW 5568 kWh 2227 kWh 3341 kWh £0 £334 £334 £11,394 34.1 yrs £-4,712
8 kW 6364 kWh 2546 kWh 3818 kWh £0 £382 £382 £13,022 34.1 yrs £-5,385

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: £159, Upfront: £10,239, Break-even: 64.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 955 kWh 636 kWh £0 £64 £64 £5,356 84.2 yrs £-4,083
3 kW 2386 kWh 1432 kWh 955 kWh £0 £95 £95 £6,983 73.2 yrs £-5,074
4 kW 3182 kWh 1909 kWh 1273 kWh £0 £127 £127 £8,611 67.7 yrs £-6,065
5 kW 3977 kWh 2386 kWh 1591 kWh £0 £159 £159 £10,239 64.4 yrs £-7,057
6 kW 4773 kWh 2864 kWh 1909 kWh £0 £191 £191 £11,867 62.2 yrs £-8,048
7 kW 5568 kWh 3341 kWh 2227 kWh £0 £223 £223 £13,494 60.6 yrs £-9,040
8 kW 6364 kWh 3818 kWh 2546 kWh £0 £255 £255 £15,122 59.4 yrs £-10,031

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: £119, Upfront: £11,639, Break-even: 97.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 1114 kWh 477 kWh £0 £48 £48 £6,756 141.5 yrs £-5,801
3 kW 2386 kWh 1671 kWh 716 kWh £0 £72 £72 £8,383 117.1 yrs £-6,951
4 kW 3182 kWh 2227 kWh 955 kWh £0 £95 £95 £10,011 104.9 yrs £-8,102
5 kW 3977 kWh 2784 kWh 1193 kWh £0 £119 £119 £11,639 97.5 yrs £-9,252
6 kW 4773 kWh 3341 kWh 1432 kWh £0 £143 £143 £13,267 92.7 yrs £-10,403
7 kW 5568 kWh 3898 kWh 1671 kWh £0 £167 £167 £14,894 89.2 yrs £-11,553
8 kW 6364 kWh 4455 kWh 1909 kWh £0 £191 £191 £16,522 86.5 yrs £-12,704

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: £107, Upfront: £13,389, Break-even: 124.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 1161 kWh 430 kWh £0 £43 £43 £8,506 198.0 yrs £-7,646
3 kW 2386 kWh 1742 kWh 644 kWh £0 £64 £64 £10,133 157.3 yrs £-8,845
4 kW 3182 kWh 2323 kWh 859 kWh £0 £86 £86 £11,761 136.9 yrs £-10,043
5 kW 3977 kWh 2904 kWh 1074 kWh £0 £107 £107 £13,389 124.7 yrs £-11,241
6 kW 4773 kWh 3484 kWh 1289 kWh £0 £129 £129 £15,017 116.5 yrs £-12,439
7 kW 5568 kWh 4065 kWh 1503 kWh £0 £150 £150 £16,644 110.7 yrs £-13,637
8 kW 6364 kWh 4646 kWh 1718 kWh £0 £172 £172 £18,272 106.3 yrs £-14,836

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: £99, Upfront: £15,139, Break-even: 152.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 1193 kWh 398 kWh £0 £40 £40 £10,256 257.8 yrs £-9,460
3 kW 2386 kWh 1790 kWh 597 kWh £0 £60 £60 £11,883 199.2 yrs £-10,690
4 kW 3182 kWh 2386 kWh 795 kWh £0 £80 £80 £13,511 169.8 yrs £-11,920
5 kW 3977 kWh 2983 kWh 994 kWh £0 £99 £99 £15,139 152.2 yrs £-13,150
6 kW 4773 kWh 3580 kWh 1193 kWh £0 £119 £119 £16,767 140.5 yrs £-14,380
7 kW 5568 kWh 4176 kWh 1392 kWh £0 £139 £139 £18,394 132.1 yrs £-15,610
8 kW 6364 kWh 4773 kWh 1591 kWh £0 £159 £159 £20,022 125.8 yrs £-16,840

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: £91, Upfront: £17,589, Break-even: 192.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1591 kWh 1225 kWh 366 kWh £0 £37 £37 £12,706 347.2 yrs £-11,974
3 kW 2386 kWh 1838 kWh 549 kWh £0 £55 £55 £14,333 261.1 yrs £-13,236
4 kW 3182 kWh 2450 kWh 732 kWh £0 £73 £73 £15,961 218.1 yrs £-14,497
5 kW 3977 kWh 3063 kWh 915 kWh £0 £91 £91 £17,589 192.3 yrs £-15,759
6 kW 4773 kWh 3675 kWh 1098 kWh £0 £110 £110 £19,217 175.0 yrs £-17,021
7 kW 5568 kWh 4288 kWh 1281 kWh £0 £128 £128 £20,844 162.8 yrs £-18,283
8 kW 6364 kWh 4900 kWh 1464 kWh £0 £146 £146 £22,472 153.5 yrs £-19,545

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 Derry City and Strabane

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 BT82

Figures below are tailored to BT82 — click through for full league tables.

Aspect Penalty View ranking →
East −18.5% West −17.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BT82

Monthly generation per kilowatt of solar panels

kWh 20 Jan 39 Feb 71 Mar 98 Apr 110 May 102 Jun 100 Jul 93 Aug 69 Sep 50 Oct 29 Nov 14 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 36.4% 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 24 kWh per month; the average month produces around 66 kWh. So a typical 4 kW home system would generate roughly 97 kWh in winter, or 265 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
795kWh/kW
A 1 kW system generates ~795 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

Derry City and Strabane (100%)

Areas Covered

Strabane North, Dunnamanagh, Artigarvan, Sion Mills, Finn, Strabane West, Ballycolman, Glenelly Valley + 2 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

BT81 (Derry City and Strabane)
≈15.9 km away
Local sunshine: ~837 kWh/kWp · +5% vs BT82
BT47 (Derry City and Strabane)
≈21.8 km away
Local sunshine: ~806 kWh/kWp · +1% vs BT82
BT48 (Derry City and Strabane)
≈21.8 km away
Local sunshine: ~827 kWh/kWp · +4% vs BT82
BT78 (Fermanagh and Omagh)
≈27.1 km away
Local sunshine: ~832 kWh/kWp · +5% vs BT82
BT79 (Fermanagh and Omagh)
≈27.9 km away
Local sunshine: ~827 kWh/kWp · +4% vs BT82
BT49 (Causeway Coast and Glens)
≈40.9 km away
Local sunshine: ~846 kWh/kWp · +6% vs BT82

Similar sunshine across the UK

LL47 (Gwynedd)
~795 kWh/kWp · -0% vs BT82
PA17 (North Ayrshire)
~796 kWh/kWp · +0% vs BT82
DG10 (Dumfries and Galloway)
~794 kWh/kWp · -0% vs BT82