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Solar panel cost in Belfast (BT11)

See realistic solar installation costs, savings and payback for BT11 (Belfast) 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
30.7 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£318
What you save every year
Profit Over 25 Years
£-1,812
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 884 kWh/kW — 107 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 884 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)
884 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: £265, Upfront: £8,139, Break-even: 30.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 707 kWh 1061 kWh £0 £106 £106 £3,256 30.7 yrs £-1,134
3 kW 2651 kWh 1061 kWh 1591 kWh £0 £159 £159 £4,883 30.7 yrs £-1,702
4 kW 3535 kWh 1414 kWh 2121 kWh £0 £212 £212 £6,511 30.7 yrs £-2,269
5 kW 4419 kWh 1768 kWh 2651 kWh £0 £265 £265 £8,139 30.7 yrs £-2,836
6 kW 5303 kWh 2121 kWh 3182 kWh £0 £318 £318 £9,767 30.7 yrs £-3,403
7 kW 6187 kWh 2475 kWh 3712 kWh £0 £371 £371 £11,394 30.7 yrs £-3,970
8 kW 7070 kWh 2828 kWh 4242 kWh £0 £424 £424 £13,022 30.7 yrs £-4,538

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: £177, Upfront: £10,239, Break-even: 57.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1061 kWh 707 kWh £0 £71 £71 £5,356 75.7 yrs £-3,941
3 kW 2651 kWh 1591 kWh 1061 kWh £0 £106 £106 £6,983 65.8 yrs £-4,862
4 kW 3535 kWh 2121 kWh 1414 kWh £0 £141 £141 £8,611 60.9 yrs £-5,783
5 kW 4419 kWh 2651 kWh 1768 kWh £0 £177 £177 £10,239 57.9 yrs £-6,704
6 kW 5303 kWh 3182 kWh 2121 kWh £0 £212 £212 £11,867 55.9 yrs £-7,624
7 kW 6187 kWh 3712 kWh 2475 kWh £0 £247 £247 £13,494 54.5 yrs £-8,545
8 kW 7070 kWh 4242 kWh 2828 kWh £0 £283 £283 £15,122 53.5 yrs £-9,466

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: £133, Upfront: £11,639, Break-even: 87.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1237 kWh 530 kWh £0 £53 £53 £6,756 127.4 yrs £-5,695
3 kW 2651 kWh 1856 kWh 795 kWh £0 £80 £80 £8,383 105.4 yrs £-6,792
4 kW 3535 kWh 2475 kWh 1061 kWh £0 £106 £106 £10,011 94.4 yrs £-7,890
5 kW 4419 kWh 3093 kWh 1326 kWh £0 £133 £133 £11,639 87.8 yrs £-8,987
6 kW 5303 kWh 3712 kWh 1591 kWh £0 £159 £159 £13,267 83.4 yrs £-10,085
7 kW 6187 kWh 4331 kWh 1856 kWh £0 £186 £186 £14,894 80.3 yrs £-11,182
8 kW 7070 kWh 4949 kWh 2121 kWh £0 £212 £212 £16,522 77.9 yrs £-12,280

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: £119, Upfront: £13,389, Break-even: 112.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1290 kWh 477 kWh £0 £48 £48 £8,506 178.2 yrs £-7,551
3 kW 2651 kWh 1936 kWh 716 kWh £0 £72 £72 £10,133 141.6 yrs £-8,702
4 kW 3535 kWh 2581 kWh 955 kWh £0 £95 £95 £11,761 123.2 yrs £-9,852
5 kW 4419 kWh 3226 kWh 1193 kWh £0 £119 £119 £13,389 112.2 yrs £-11,003
6 kW 5303 kWh 3871 kWh 1432 kWh £0 £143 £143 £15,017 104.9 yrs £-12,153
7 kW 6187 kWh 4516 kWh 1670 kWh £0 £167 £167 £16,644 99.6 yrs £-13,304
8 kW 7070 kWh 5161 kWh 1909 kWh £0 £191 £191 £18,272 95.7 yrs £-14,454

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: £110, Upfront: £15,139, Break-even: 137.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1326 kWh 442 kWh £0 £44 £44 £10,256 232.1 yrs £-9,372
3 kW 2651 kWh 1989 kWh 663 kWh £0 £66 £66 £11,883 179.3 yrs £-10,558
4 kW 3535 kWh 2651 kWh 884 kWh £0 £88 £88 £13,511 152.9 yrs £-11,743
5 kW 4419 kWh 3314 kWh 1105 kWh £0 £110 £110 £15,139 137.0 yrs £-12,929
6 kW 5303 kWh 3977 kWh 1326 kWh £0 £133 £133 £16,767 126.5 yrs £-14,115
7 kW 6187 kWh 4640 kWh 1547 kWh £0 £155 £155 £18,394 118.9 yrs £-15,301
8 kW 7070 kWh 5303 kWh 1768 kWh £0 £177 £177 £20,022 113.3 yrs £-16,487

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: £102, Upfront: £17,589, Break-even: 173.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1361 kWh 407 kWh £0 £41 £41 £12,706 312.5 yrs £-11,892
3 kW 2651 kWh 2042 kWh 610 kWh £0 £61 £61 £14,333 235.0 yrs £-13,114
4 kW 3535 kWh 2722 kWh 813 kWh £0 £81 £81 £15,961 196.3 yrs £-14,335
5 kW 4419 kWh 3403 kWh 1016 kWh £0 £102 £102 £17,589 173.1 yrs £-15,556
6 kW 5303 kWh 4083 kWh 1220 kWh £0 £122 £122 £19,217 157.6 yrs £-16,777
7 kW 6187 kWh 4764 kWh 1423 kWh £0 £142 £142 £20,844 146.5 yrs £-17,998
8 kW 7070 kWh 5444 kWh 1626 kWh £0 £163 £163 £22,472 138.2 yrs £-19,220

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 Belfast

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for BT11

Figures below are tailored to BT11 — click through for full league tables.

Aspect Penalty View ranking →
East −21.3% West −20.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BT11

Monthly generation per kilowatt of solar panels

kWh 29 Jan 45 Feb 78 Mar 103 Apr 118 May 111 Jun 106 Jul 97 Aug 78 Sep 56 Oct 37 Nov 25 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 45.0% 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 33 kWh per month; the average month produces around 74 kWh. So a typical 4 kW home system would generate roughly 133 kWh in winter, or 295 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
884kWh/kW
A 1 kW system generates ~884 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

Belfast (100%)

Areas Covered

Falls Park, Shaw's Road, Andersonstown, Collin Glen, Stewartstown, Ladybrook, Turf Lodge

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

BT10 (Belfast)
≈1.9 km away
Local sunshine: ~884 kWh/kWp · -0% vs BT11
BT17 (Belfast)
≈2.9 km away
Local sunshine: ~886 kWh/kWp · +0% vs BT11
BT9 (Belfast)
≈3.1 km away
Local sunshine: ~893 kWh/kWp · +1% vs BT11
BT12 (Belfast)
≈3.3 km away
Local sunshine: ~893 kWh/kWp · +1% vs BT11
BT13 (Belfast)
≈4.2 km away
Local sunshine: ~886 kWh/kWp · +0% vs BT11
BT2 (Belfast)
≈4.6 km away
Local sunshine: ~893 kWh/kWp · +1% vs BT11

Similar sunshine across the UK

CA3 (Cumberland)
~884 kWh/kWp · +0% vs BT11
CF42 (Rhondda Cynon Taf)
~884 kWh/kWp · -0% vs BT11
M33 (Trafford)
~884 kWh/kWp · -0% vs BT11