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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in DG14 (Dumfries and Galloway)

See if solar pays off for you in Dumfries and Galloway — price, savings and payback in under a minute (official UK data).

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
14.4 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£846
What you save every year
Profit Over 25 Years
£8,937
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 25.84p/kWh with a 56.55p/day standing charge. Your postcode’s south-facing sunshine yield is 863 kWh/kW — 13 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 863 kWh per year on a south-facing roof. We value self-used electricity at 25.8p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.8p/kWh
Standing charge
56.5p/day
Sunshine yield (south)
863 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: £705, Upfront: £10,173, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1726 kWh 690 kWh 1035 kWh £178 £104 £282 £4,069 14.4 yrs £1,570
3 kW 2589 kWh 1035 kWh 1553 kWh £268 £155 £423 £6,104 14.4 yrs £2,354
4 kW 3452 kWh 1381 kWh 2071 kWh £357 £207 £564 £8,138 14.4 yrs £3,139
5 kW 4314 kWh 1726 kWh 2589 kWh £446 £259 £705 £10,173 14.4 yrs £3,924
6 kW 5177 kWh 2071 kWh 3106 kWh £535 £311 £846 £12,207 14.4 yrs £4,709
7 kW 6040 kWh 2416 kWh 3624 kWh £624 £362 £987 £14,242 14.4 yrs £5,493
8 kW 6903 kWh 2761 kWh 4142 kWh £714 £414 £1,128 £16,276 14.4 yrs £6,278

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £842, Upfront: £12,273, Break-even: 14.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1726 kWh 1035 kWh 690 kWh £268 £69 £337 £6,169 18.3 yrs £563
3 kW 2589 kWh 1553 kWh 1035 kWh £401 £104 £505 £8,204 16.2 yrs £1,894
4 kW 3452 kWh 2071 kWh 1381 kWh £535 £138 £673 £10,238 15.2 yrs £3,226
5 kW 4314 kWh 2589 kWh 1726 kWh £669 £173 £842 £12,273 14.6 yrs £4,557
6 kW 5177 kWh 3106 kWh 2071 kWh £803 £207 £1,010 £14,307 14.2 yrs £5,889
7 kW 6040 kWh 3624 kWh 2416 kWh £936 £242 £1,178 £16,342 13.9 yrs £7,220
8 kW 6903 kWh 4142 kWh 2761 kWh £1,070 £276 £1,346 £18,376 13.6 yrs £8,552

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £910, Upfront: £13,673, 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 1726 kWh 1208 kWh 518 kWh £312 £52 £364 £7,569 20.8 yrs £-290
3 kW 2589 kWh 1812 kWh 777 kWh £468 £78 £546 £9,604 17.6 yrs £1,315
4 kW 3452 kWh 2416 kWh 1035 kWh £624 £104 £728 £11,638 16.0 yrs £2,919
5 kW 4314 kWh 3020 kWh 1294 kWh £780 £129 £910 £13,673 15.0 yrs £4,524
6 kW 5177 kWh 3624 kWh 1553 kWh £936 £155 £1,092 £15,707 14.4 yrs £6,129
7 kW 6040 kWh 4228 kWh 1812 kWh £1,093 £181 £1,274 £17,742 13.9 yrs £7,734
8 kW 6903 kWh 4832 kWh 2071 kWh £1,249 £207 £1,456 £19,776 13.6 yrs £9,339

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £930, Upfront: £15,423, Break-even: 16.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1726 kWh 1260 kWh 466 kWh £326 £47 £372 £9,319 25.0 yrs £-1,876
3 kW 2589 kWh 1890 kWh 699 kWh £488 £70 £558 £11,354 20.3 yrs £-189
4 kW 3452 kWh 2520 kWh 932 kWh £651 £93 £744 £13,388 18.0 yrs £1,497
5 kW 4314 kWh 3150 kWh 1165 kWh £814 £116 £930 £15,423 16.6 yrs £3,184
6 kW 5177 kWh 3780 kWh 1398 kWh £977 £140 £1,116 £17,457 15.6 yrs £4,871
7 kW 6040 kWh 4409 kWh 1631 kWh £1,139 £163 £1,302 £19,492 15.0 yrs £6,558
8 kW 6903 kWh 5039 kWh 1864 kWh £1,302 £186 £1,489 £21,526 14.5 yrs £8,245

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £944, Upfront: £17,173, Break-even: 18.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1726 kWh 1294 kWh 431 kWh £334 £43 £378 £11,069 29.3 yrs £-3,517
3 kW 2589 kWh 1942 kWh 647 kWh £502 £65 £566 £13,104 23.1 yrs £-1,775
4 kW 3452 kWh 2589 kWh 863 kWh £669 £86 £755 £15,138 20.0 yrs £-34
5 kW 4314 kWh 3236 kWh 1079 kWh £836 £108 £944 £17,173 18.2 yrs £1,708
6 kW 5177 kWh 3883 kWh 1294 kWh £1,003 £129 £1,133 £19,207 17.0 yrs £3,449
7 kW 6040 kWh 4530 kWh 1510 kWh £1,171 £151 £1,322 £21,242 16.1 yrs £5,191
8 kW 6903 kWh 5177 kWh 1726 kWh £1,338 £173 £1,510 £23,276 15.4 yrs £6,932

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £958, Upfront: £19,623, Break-even: 20.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1726 kWh 1329 kWh 397 kWh £343 £40 £383 £13,519 35.3 yrs £-5,858
3 kW 2589 kWh 1993 kWh 595 kWh £515 £60 £575 £15,554 27.1 yrs £-4,061
4 kW 3452 kWh 2658 kWh 794 kWh £687 £79 £766 £17,588 23.0 yrs £-2,265
5 kW 4314 kWh 3322 kWh 992 kWh £858 £99 £958 £19,623 20.5 yrs £-469
6 kW 5177 kWh 3987 kWh 1191 kWh £1,030 £119 £1,149 £21,657 18.8 yrs £1,327
7 kW 6040 kWh 4651 kWh 1389 kWh £1,202 £139 £1,341 £23,692 17.7 yrs £3,123
8 kW 6903 kWh 5315 kWh 1588 kWh £1,374 £159 £1,532 £25,726 16.8 yrs £4,920

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for DG14

Figures below are tailored to DG14 — click through for full league tables.

Solar Payback Index Rank #2666 of 2997
12.6 years (UK avg 11.3 years)
~£969 /yr • £12,207 upfront
Standing-Charge Drag Rank #1681 of 2997
21.3% (UK avg 21.7%) drag on savings
£206 fixed • ~£969 /yr value

Your Area at a Glance

Your Electricity Rate
25.84p/kWh
Daily Fixed Charge
56.55p/day
Local Sunshine
863kWh/kW
A 1 kW system generates ~863 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 (99%)|Scottish Borders (1%)

Areas Covered

Annandale East and Eskdale, Hawick and Hermitage, Annandale South

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q4 2025

Installation costs: MCS certified installer data, March 2025

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

DG13 (Dumfries and Galloway)
≈8.4 km away
Local sunshine: ~841 kWh/kWp · -3% vs DG14
DG16 (Dumfries and Galloway)
≈11.6 km away
Local sunshine: ~900 kWh/kWp · +4% vs DG14
DG12 (Dumfries and Galloway)
≈21.5 km away
Local sunshine: ~906 kWh/kWp · +5% vs DG14
DG11 (Dumfries and Galloway)
≈25.5 km away
Local sunshine: ~875 kWh/kWp · +1% vs DG14
TD9 (Scottish Borders)
≈39.7 km away
Local sunshine: ~843 kWh/kWp · -2% vs DG14
DG1 (Dumfries and Galloway)
≈40.4 km away
Local sunshine: ~881 kWh/kWp · +2% vs DG14

Similar sunshine across the UK

AB53 (Aberdeenshire)
~862 kWh/kWp · -0% vs DG14
SA20 (Carmarthenshire)
~863 kWh/kWp · +0% vs DG14
BT69 (Mid Ulster)
~863 kWh/kWp · +0% vs DG14