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Solar panel cost in Dumfries and Galloway (DG3)

See realistic solar installation costs, savings and payback for DG3 (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
12.0 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£813
What you save every year
Profit Over 25 Years
£10,559
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 829 kWh/kW — 20 below 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 829 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)
829 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: £678, Upfront: £8,139, Break-even: 12.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1659 kWh 663 kWh 995 kWh £171 £100 £271 £3,256 12.0 yrs £2,165
3 kW 2488 kWh 995 kWh 1493 kWh £257 £149 £407 £4,883 12.0 yrs £3,247
4 kW 3317 kWh 1327 kWh 1990 kWh £343 £199 £542 £6,511 12.0 yrs £4,329
5 kW 4146 kWh 1659 kWh 2488 kWh £429 £249 £678 £8,139 12.0 yrs £5,412
6 kW 4976 kWh 1990 kWh 2985 kWh £514 £299 £813 £9,767 12.0 yrs £6,494
7 kW 5805 kWh 2322 kWh 3483 kWh £600 £348 £949 £11,394 12.0 yrs £7,577
8 kW 6634 kWh 2654 kWh 3981 kWh £686 £398 £1,084 £13,022 12.0 yrs £8,659

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: £809, Upfront: £10,239, Break-even: 12.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1659 kWh 995 kWh 663 kWh £257 £66 £324 £5,356 16.6 yrs £1,116
3 kW 2488 kWh 1493 kWh 995 kWh £386 £100 £485 £6,983 14.4 yrs £2,724
4 kW 3317 kWh 1990 kWh 1327 kWh £514 £133 £647 £8,611 13.3 yrs £4,333
5 kW 4146 kWh 2488 kWh 1659 kWh £643 £166 £809 £10,239 12.7 yrs £5,941
6 kW 4976 kWh 2985 kWh 1990 kWh £772 £199 £971 £11,867 12.2 yrs £7,549
7 kW 5805 kWh 3483 kWh 2322 kWh £900 £232 £1,133 £13,494 11.9 yrs £9,157
8 kW 6634 kWh 3981 kWh 2654 kWh £1,029 £265 £1,294 £15,122 11.7 yrs £10,765

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: £875, Upfront: £11,639, 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 1659 kWh 1161 kWh 498 kWh £300 £50 £350 £6,756 19.3 yrs £242
3 kW 2488 kWh 1742 kWh 746 kWh £450 £75 £525 £8,383 16.0 yrs £2,113
4 kW 3317 kWh 2322 kWh 995 kWh £600 £100 £700 £10,011 14.3 yrs £3,984
5 kW 4146 kWh 2903 kWh 1244 kWh £750 £124 £875 £11,639 13.3 yrs £5,855
6 kW 4976 kWh 3483 kWh 1493 kWh £900 £149 £1,050 £13,267 12.6 yrs £7,726
7 kW 5805 kWh 4064 kWh 1742 kWh £1,050 £174 £1,225 £14,894 12.2 yrs £9,597
8 kW 6634 kWh 4644 kWh 1990 kWh £1,200 £199 £1,400 £16,522 11.8 yrs £11,468

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: £894, Upfront: £13,389, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1659 kWh 1211 kWh 448 kWh £313 £45 £358 £8,506 23.8 yrs £-1,350
3 kW 2488 kWh 1816 kWh 672 kWh £469 £67 £537 £10,133 18.9 yrs £600
4 kW 3317 kWh 2422 kWh 896 kWh £626 £90 £716 £11,761 16.4 yrs £2,550
5 kW 4146 kWh 3027 kWh 1120 kWh £782 £112 £894 £13,389 15.0 yrs £4,499
6 kW 4976 kWh 3632 kWh 1343 kWh £939 £134 £1,073 £15,017 14.0 yrs £6,449
7 kW 5805 kWh 4238 kWh 1567 kWh £1,095 £157 £1,252 £16,644 13.3 yrs £8,399
8 kW 6634 kWh 4843 kWh 1791 kWh £1,252 £179 £1,431 £18,272 12.8 yrs £10,349

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: £908, Upfront: £15,139, Break-even: 16.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1659 kWh 1244 kWh 415 kWh £322 £41 £363 £10,256 28.3 yrs £-2,995
3 kW 2488 kWh 1866 kWh 622 kWh £482 £62 £545 £11,883 21.8 yrs £-993
4 kW 3317 kWh 2488 kWh 829 kWh £643 £83 £726 £13,511 18.6 yrs £1,010
5 kW 4146 kWh 3110 kWh 1037 kWh £804 £104 £908 £15,139 16.7 yrs £3,012
6 kW 4976 kWh 3732 kWh 1244 kWh £965 £124 £1,089 £16,767 15.4 yrs £5,015
7 kW 5805 kWh 4354 kWh 1451 kWh £1,125 £145 £1,271 £18,394 14.5 yrs £7,017
8 kW 6634 kWh 4976 kWh 1659 kWh £1,286 £166 £1,452 £20,022 13.8 yrs £9,020

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: £921, Upfront: £17,589, Break-even: 19.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1659 kWh 1277 kWh 381 kWh £330 £38 £368 £12,706 34.5 yrs £-5,340
3 kW 2488 kWh 1916 kWh 572 kWh £495 £57 £552 £14,333 25.9 yrs £-3,285
4 kW 3317 kWh 2554 kWh 763 kWh £660 £76 £737 £15,961 21.7 yrs £-1,230
5 kW 4146 kWh 3193 kWh 954 kWh £825 £95 £921 £17,589 19.1 yrs £825
6 kW 4976 kWh 3831 kWh 1144 kWh £990 £114 £1,105 £19,217 17.4 yrs £2,880
7 kW 5805 kWh 4470 kWh 1335 kWh £1,155 £134 £1,289 £20,844 16.2 yrs £4,935
8 kW 6634 kWh 5108 kWh 1526 kWh £1,321 £153 £1,473 £22,472 15.3 yrs £6,990

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 DG3

Figures below are tailored to DG3 — click through for full league tables.

Solar Payback Index Rank #2506 of 2996
12.0 years (UK avg 10.8 years)
~£813 /yr • £9,767 upfront
Standing-Charge Drag Rank #2031 of 2996
28.8% (UK avg 26.6%) drag on savings
£234 fixed • ~£813 /yr value
Aspect Penalty View ranking →
East −19.8% West −19.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DG3

Monthly generation per kilowatt of solar panels

kWh 25 Jan 41 Feb 71 Mar 102 Apr 113 May 106 Jun 106 Jul 94 Aug 73 Sep 49 Oct 32 Nov 19 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 40.9% 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 28 kWh per month; the average month produces around 69 kWh. So a typical 4 kW home system would generate roughly 113 kWh in winter, or 276 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.85p/kWh
Daily Fixed Charge
64.17p/day
Local Sunshine
829kWh/kW
A 1 kW system generates ~829 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

Mid and Upper Nithsdale, Dee and Glenkens

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

DG4 (Dumfries and Galloway)
≈18.5 km away
Local sunshine: ~829 kWh/kWp · -0% vs DG3
DG2 (Dumfries and Galloway)
≈20.7 km away
Local sunshine: ~881 kWh/kWp · +6% vs DG3
DG1 (Dumfries and Galloway)
≈21.8 km away
Local sunshine: ~881 kWh/kWp · +6% vs DG3
DG10 (Dumfries and Galloway)
≈23.1 km away
Local sunshine: ~794 kWh/kWp · -4% vs DG3
DG11 (Dumfries and Galloway)
≈29.3 km away
Local sunshine: ~875 kWh/kWp · +6% vs DG3
DG5 (Dumfries and Galloway)
≈34.5 km away
Local sunshine: ~918 kWh/kWp · +11% vs DG3

Similar sunshine across the UK

IV18 (Highland)
~829 kWh/kWp · +0% vs DG3
SK13 (High Peak)
~830 kWh/kWp · +0% vs DG3
PA62 (Argyll and Bute)
~829 kWh/kWp · -0% vs DG3