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Solar panel cost in Dumfries and Galloway (DG7)

See realistic solar installation costs, savings and payback for DG7 (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
10.7 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£913
What you save every year
Profit Over 25 Years
£13,061
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 931 kWh/kW — 82 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 931 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)
931 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: £761, Upfront: £8,139, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 745 kWh 1118 kWh £193 £112 £304 £3,256 10.7 yrs £2,832
3 kW 2794 kWh 1118 kWh 1676 kWh £289 £168 £457 £4,883 10.7 yrs £4,248
4 kW 3725 kWh 1490 kWh 2235 kWh £385 £224 £609 £6,511 10.7 yrs £5,664
5 kW 4657 kWh 1863 kWh 2794 kWh £482 £279 £761 £8,139 10.7 yrs £7,080
6 kW 5588 kWh 2235 kWh 3353 kWh £578 £335 £913 £9,767 10.7 yrs £8,496
7 kW 6520 kWh 2608 kWh 3912 kWh £674 £391 £1,065 £11,394 10.7 yrs £9,912
8 kW 7451 kWh 2980 kWh 4471 kWh £770 £447 £1,217 £13,022 10.7 yrs £11,328

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: £909, Upfront: £10,239, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 1118 kWh 745 kWh £289 £75 £363 £5,356 14.7 yrs £1,913
3 kW 2794 kWh 1676 kWh 1118 kWh £433 £112 £545 £6,983 12.8 yrs £3,919
4 kW 3725 kWh 2235 kWh 1490 kWh £578 £149 £727 £8,611 11.8 yrs £5,926
5 kW 4657 kWh 2794 kWh 1863 kWh £722 £186 £909 £10,239 11.3 yrs £7,932
6 kW 5588 kWh 3353 kWh 2235 kWh £867 £224 £1,090 £11,867 10.9 yrs £9,939
7 kW 6520 kWh 3912 kWh 2608 kWh £1,011 £261 £1,272 £13,494 10.6 yrs £11,945
8 kW 7451 kWh 4471 kWh 2980 kWh £1,156 £298 £1,454 £15,122 10.4 yrs £13,952

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: £982, Upfront: £11,639, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 1304 kWh 559 kWh £337 £56 £393 £6,756 17.2 yrs £1,103
3 kW 2794 kWh 1956 kWh 838 kWh £506 £84 £589 £8,383 14.2 yrs £3,405
4 kW 3725 kWh 2608 kWh 1118 kWh £674 £112 £786 £10,011 12.7 yrs £5,707
5 kW 4657 kWh 3260 kWh 1397 kWh £843 £140 £982 £11,639 11.8 yrs £8,008
6 kW 5588 kWh 3912 kWh 1676 kWh £1,011 £168 £1,179 £13,267 11.3 yrs £10,310
7 kW 6520 kWh 4564 kWh 1956 kWh £1,180 £196 £1,375 £14,894 10.8 yrs £12,612
8 kW 7451 kWh 5216 kWh 2235 kWh £1,348 £224 £1,572 £16,522 10.5 yrs £14,914

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: £1,005, Upfront: £13,389, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 1360 kWh 503 kWh £352 £50 £402 £8,506 21.2 yrs £-469
3 kW 2794 kWh 2040 kWh 754 kWh £527 £75 £603 £10,133 16.8 yrs £1,921
4 kW 3725 kWh 2720 kWh 1006 kWh £703 £101 £804 £11,761 14.6 yrs £4,311
5 kW 4657 kWh 3400 kWh 1257 kWh £879 £126 £1,005 £13,389 13.3 yrs £6,701
6 kW 5588 kWh 4079 kWh 1509 kWh £1,055 £151 £1,205 £15,017 12.5 yrs £9,092
7 kW 6520 kWh 4759 kWh 1760 kWh £1,230 £176 £1,406 £16,644 11.8 yrs £11,482
8 kW 7451 kWh 5439 kWh 2012 kWh £1,406 £201 £1,607 £18,272 11.4 yrs £13,872

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: £1,019, Upfront: £15,139, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 1397 kWh 466 kWh £361 £47 £408 £10,256 25.2 yrs £-2,101
3 kW 2794 kWh 2096 kWh 699 kWh £542 £70 £612 £11,883 19.4 yrs £348
4 kW 3725 kWh 2794 kWh 931 kWh £722 £93 £815 £13,511 16.6 yrs £2,797
5 kW 4657 kWh 3493 kWh 1164 kWh £903 £116 £1,019 £15,139 14.9 yrs £5,247
6 kW 5588 kWh 4191 kWh 1397 kWh £1,083 £140 £1,223 £16,767 13.7 yrs £7,696
7 kW 6520 kWh 4890 kWh 1630 kWh £1,264 £163 £1,427 £18,394 12.9 yrs £10,145
8 kW 7451 kWh 5588 kWh 1863 kWh £1,445 £186 £1,631 £20,022 12.3 yrs £12,594

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: £1,034, Upfront: £17,589, Break-even: 17.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1863 kWh 1434 kWh 428 kWh £371 £43 £414 £12,706 30.7 yrs £-4,433
3 kW 2794 kWh 2151 kWh 643 kWh £556 £64 £620 £14,333 23.1 yrs £-1,925
4 kW 3725 kWh 2869 kWh 857 kWh £742 £86 £827 £15,961 19.3 yrs £583
5 kW 4657 kWh 3586 kWh 1071 kWh £927 £107 £1,034 £17,589 17.0 yrs £3,092
6 kW 5588 kWh 4303 kWh 1285 kWh £1,112 £129 £1,241 £19,217 15.5 yrs £5,600
7 kW 6520 kWh 5020 kWh 1500 kWh £1,298 £150 £1,448 £20,844 14.4 yrs £8,109
8 kW 7451 kWh 5737 kWh 1714 kWh £1,483 £171 £1,654 £22,472 13.6 yrs £10,617

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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Understand DNO, G98 and G99 export limits

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Insights for DG7

Figures below are tailored to DG7 — click through for full league tables.

Solar Payback Index Rank #1672 of 2996
10.7 years (UK avg 10.8 years)
~£913 /yr • £9,767 upfront
Standing-Charge Drag Rank #1530 of 2996
25.6% (UK avg 26.6%) drag on savings
£234 fixed • ~£913 /yr value
Aspect Penalty View ranking →
East −20.4% West −21.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DG7

Monthly generation per kilowatt of solar panels

kWh 28 Jan 47 Feb 78 Mar 111 Apr 126 May 121 Jun 119 Jul 105 Aug 81 Sep 54 Oct 36 Nov 24 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 42.7% 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 78 kWh. So a typical 4 kW home system would generate roughly 133 kWh in winter, or 310 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.85p/kWh
Daily Fixed Charge
64.17p/day
Local Sunshine
931kWh/kW
A 1 kW system generates ~931 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

Castle Douglas and Crocketford, Dee and Glenkens, Mid Galloway and Wigtown West

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

DG5 (Dumfries and Galloway)
≈8.2 km away
Local sunshine: ~918 kWh/kWp · -1% vs DG7
DG6 (Dumfries and Galloway)
≈13.6 km away
Local sunshine: ~950 kWh/kWp · +2% vs DG7
DG2 (Dumfries and Galloway)
≈24.4 km away
Local sunshine: ~881 kWh/kWp · -5% vs DG7
DG1 (Dumfries and Galloway)
≈26.5 km away
Local sunshine: ~881 kWh/kWp · -5% vs DG7
DG3 (Dumfries and Galloway)
≈34.8 km away
Local sunshine: ~829 kWh/kWp · -11% vs DG7
DG8 (Dumfries and Galloway)
≈34.9 km away
Local sunshine: ~952 kWh/kWp · +2% vs DG7

Similar sunshine across the UK

S74 (Barnsley)
~932 kWh/kWp · +0% vs DG7
WF5 (Wakefield)
~931 kWh/kWp · -0% vs DG7
LL74 (Isle of Anglesey)
~932 kWh/kWp · +0% vs DG7