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Solar panel cost in Dumfries and Galloway (DG12)

See realistic solar installation costs, savings and payback for DG12 (Dumfries and Galloway) 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
11.0 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£888
What you save every year
Profit Over 25 Years
£12,431
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 Southern Scotland, the current unit rate is 25.85p/kWh with a 64.17p/day standing charge. Your postcode’s south-facing sunshine yield is 906 kWh/kW — 56 above the regional median (850).

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 906 kWh per year on a south-facing roof. We value self-used electricity at 25.9p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.9p/kWh
Standing charge
64.2p/day
Sunshine yield (south)
906 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: £740, Upfront: £8,139, Break-even: 11.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 725 kWh 1087 kWh £187 £109 £296 £3,256 11.0 yrs £2,664
3 kW 2717 kWh 1087 kWh 1630 kWh £281 £163 £444 £4,883 11.0 yrs £3,996
4 kW 3623 kWh 1449 kWh 2174 kWh £375 £217 £592 £6,511 11.0 yrs £5,328
5 kW 4528 kWh 1811 kWh 2717 kWh £468 £272 £740 £8,139 11.0 yrs £6,660
6 kW 5434 kWh 2174 kWh 3260 kWh £562 £326 £888 £9,767 11.0 yrs £7,992
7 kW 6340 kWh 2536 kWh 3804 kWh £656 £380 £1,036 £11,394 11.0 yrs £9,324
8 kW 7245 kWh 2898 kWh 4347 kWh £749 £435 £1,184 £13,022 11.0 yrs £10,655

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: £883, Upfront: £10,239, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 1087 kWh 725 kWh £281 £72 £353 £5,356 15.2 yrs £1,712
3 kW 2717 kWh 1630 kWh 1087 kWh £421 £109 £530 £6,983 13.2 yrs £3,618
4 kW 3623 kWh 2174 kWh 1449 kWh £562 £145 £707 £8,611 12.2 yrs £5,525
5 kW 4528 kWh 2717 kWh 1811 kWh £702 £181 £883 £10,239 11.6 yrs £7,431
6 kW 5434 kWh 3260 kWh 2174 kWh £843 £217 £1,060 £11,867 11.2 yrs £9,337
7 kW 6340 kWh 3804 kWh 2536 kWh £983 £254 £1,237 £13,494 10.9 yrs £11,243
8 kW 7245 kWh 4347 kWh 2898 kWh £1,124 £290 £1,414 £15,122 10.7 yrs £13,149

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: £955, Upfront: £11,639, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 1268 kWh 543 kWh £328 £54 £382 £6,756 17.7 yrs £886
3 kW 2717 kWh 1902 kWh 815 kWh £492 £82 £573 £8,383 14.6 yrs £3,080
4 kW 3623 kWh 2536 kWh 1087 kWh £656 £109 £764 £10,011 13.1 yrs £5,273
5 kW 4528 kWh 3170 kWh 1358 kWh £819 £136 £955 £11,639 12.2 yrs £7,466
6 kW 5434 kWh 3804 kWh 1630 kWh £983 £163 £1,146 £13,267 11.6 yrs £9,659
7 kW 6340 kWh 4438 kWh 1902 kWh £1,147 £190 £1,337 £14,894 11.1 yrs £11,853
8 kW 7245 kWh 5072 kWh 2174 kWh £1,311 £217 £1,528 £16,522 10.8 yrs £14,046

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: £977, Upfront: £13,389, Break-even: 13.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 1322 kWh 489 kWh £342 £49 £391 £8,506 21.8 yrs £-691
3 kW 2717 kWh 1983 kWh 734 kWh £513 £73 £586 £10,133 17.3 yrs £1,588
4 kW 3623 kWh 2645 kWh 978 kWh £684 £98 £781 £11,761 15.1 yrs £3,867
5 kW 4528 kWh 3306 kWh 1223 kWh £855 £122 £977 £13,389 13.7 yrs £6,147
6 kW 5434 kWh 3967 kWh 1467 kWh £1,025 £147 £1,172 £15,017 12.8 yrs £8,426
7 kW 6340 kWh 4628 kWh 1712 kWh £1,196 £171 £1,367 £16,644 12.2 yrs £10,705
8 kW 7245 kWh 5289 kWh 1956 kWh £1,367 £196 £1,563 £18,272 11.7 yrs £12,985

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: £991, Upfront: £15,139, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 1358 kWh 453 kWh £351 £45 £396 £10,256 25.9 yrs £-2,326
3 kW 2717 kWh 2038 kWh 679 kWh £527 £68 £595 £11,883 20.0 yrs £10
4 kW 3623 kWh 2717 kWh 906 kWh £702 £91 £793 £13,511 17.0 yrs £2,347
5 kW 4528 kWh 3396 kWh 1132 kWh £878 £113 £991 £15,139 15.3 yrs £4,684
6 kW 5434 kWh 4075 kWh 1358 kWh £1,054 £136 £1,189 £16,767 14.1 yrs £7,021
7 kW 6340 kWh 4755 kWh 1585 kWh £1,229 £158 £1,388 £18,394 13.3 yrs £9,357
8 kW 7245 kWh 5434 kWh 1811 kWh £1,405 £181 £1,586 £20,022 12.6 yrs £11,694

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: £1,005, Upfront: £17,589, Break-even: 17.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1811 kWh 1395 kWh 417 kWh £361 £42 £402 £12,706 31.6 yrs £-4,662
3 kW 2717 kWh 2092 kWh 625 kWh £541 £62 £603 £14,333 23.8 yrs £-2,267
4 kW 3623 kWh 2789 kWh 833 kWh £721 £83 £804 £15,961 19.8 yrs £127
5 kW 4528 kWh 3487 kWh 1042 kWh £901 £104 £1,005 £17,589 17.5 yrs £2,521
6 kW 5434 kWh 4184 kWh 1250 kWh £1,082 £125 £1,207 £19,217 15.9 yrs £4,915
7 kW 6340 kWh 4882 kWh 1458 kWh £1,262 £146 £1,408 £20,844 14.8 yrs £7,309
8 kW 7245 kWh 5579 kWh 1666 kWh £1,442 £167 £1,609 £22,472 14.0 yrs £9,703

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 Dumfries and Galloway

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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Insights for DG12

Figures below are tailored to DG12 — click through for full league tables.

Solar Payback Index Rank #1961 of 2996
11.0 years (UK avg 10.8 years)
~£888 /yr • £9,767 upfront
Standing-Charge Drag Rank #1651 of 2996
26.4% (UK avg 26.6%) drag on savings
£234 fixed • ~£888 /yr value
Aspect Penalty View ranking →
East −20.9% West −21.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DG12

Monthly generation per kilowatt of solar panels

kWh 28 Jan 46 Feb 77 Mar 108 Apr 122 May 116 Jun 115 Jul 102 Aug 79 Sep 54 Oct 36 Nov 23 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 43.0% 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 32 kWh per month; the average month produces around 75 kWh. So a typical 4 kW home system would generate roughly 130 kWh in winter, or 302 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.85p/kWh
Daily Fixed Charge
64.17p/day
Local Sunshine
906kWh/kW
A 1 kW system generates ~906 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

Dumfries and Galloway (100%)

Areas Covered

Annandale South, Annandale East and Eskdale

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q3 2026

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 Southern Scotland

DG16 (Dumfries and Galloway)
≈12.2 km away
Local sunshine: ~900 kWh/kWp · -1% vs DG12
DG11 (Dumfries and Galloway)
≈16.1 km away
Local sunshine: ~875 kWh/kWp · -3% vs DG12
DG14 (Dumfries and Galloway)
≈21.5 km away
Local sunshine: ~863 kWh/kWp · -5% vs DG12
DG1 (Dumfries and Galloway)
≈23.4 km away
Local sunshine: ~881 kWh/kWp · -3% vs DG12
DG13 (Dumfries and Galloway)
≈24.6 km away
Local sunshine: ~841 kWh/kWp · -7% vs DG12
DG2 (Dumfries and Galloway)
≈25.6 km away
Local sunshine: ~881 kWh/kWp · -3% vs DG12

Similar sunshine across the UK

LL32 (Conwy)
~906 kWh/kWp · +0% vs DG12
BD17 (Bradford)
~906 kWh/kWp · +0% vs DG12
BD97 (Bradford)
~905 kWh/kWp · -0% vs DG12