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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in DG10 (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
15.7 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£778
What you save every year
Profit Over 25 Years
£7,249
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 794 kWh/kW — 56 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 794 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)
794 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: £649, Upfront: £10,173, Break-even: 15.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 635 kWh 953 kWh £164 £95 £259 £4,069 15.7 yrs £1,119
3 kW 2382 kWh 953 kWh 1429 kWh £246 £143 £389 £6,104 15.7 yrs £1,679
4 kW 3176 kWh 1270 kWh 1906 kWh £328 £191 £519 £8,138 15.7 yrs £2,238
5 kW 3970 kWh 1588 kWh 2382 kWh £410 £238 £649 £10,173 15.7 yrs £2,798
6 kW 4764 kWh 1906 kWh 2858 kWh £492 £286 £778 £12,207 15.7 yrs £3,358
7 kW 5558 kWh 2223 kWh 3335 kWh £574 £333 £908 £14,242 15.7 yrs £3,917
8 kW 6352 kWh 2541 kWh 3811 kWh £657 £381 £1,038 £16,276 15.7 yrs £4,477

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: £774, Upfront: £12,273, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 953 kWh 635 kWh £246 £64 £310 £6,169 19.9 yrs £25
3 kW 2382 kWh 1429 kWh 953 kWh £369 £95 £465 £8,204 17.7 yrs £1,088
4 kW 3176 kWh 1906 kWh 1270 kWh £492 £127 £619 £10,238 16.5 yrs £2,151
5 kW 3970 kWh 2382 kWh 1588 kWh £616 £159 £774 £12,273 15.8 yrs £3,213
6 kW 4764 kWh 2858 kWh 1906 kWh £739 £191 £929 £14,307 15.4 yrs £4,276
7 kW 5558 kWh 3335 kWh 2223 kWh £862 £222 £1,084 £16,342 15.1 yrs £5,339
8 kW 6352 kWh 3811 kWh 2541 kWh £985 £254 £1,239 £18,376 14.8 yrs £6,401

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: £837, Upfront: £13,673, Break-even: 16.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 1112 kWh 476 kWh £287 £48 £335 £7,569 22.6 yrs £-872
3 kW 2382 kWh 1667 kWh 715 kWh £431 £71 £502 £9,604 19.1 yrs £443
4 kW 3176 kWh 2223 kWh 953 kWh £574 £95 £670 £11,638 17.4 yrs £1,757
5 kW 3970 kWh 2779 kWh 1191 kWh £718 £119 £837 £13,673 16.3 yrs £3,071
6 kW 4764 kWh 3335 kWh 1429 kWh £862 £143 £1,005 £15,707 15.6 yrs £4,385
7 kW 5558 kWh 3891 kWh 1667 kWh £1,005 £167 £1,172 £17,742 15.1 yrs £5,700
8 kW 6352 kWh 4446 kWh 1906 kWh £1,149 £191 £1,339 £19,776 14.8 yrs £7,014

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: £856, Upfront: £15,423, Break-even: 18.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 1159 kWh 429 kWh £300 £43 £342 £9,319 27.2 yrs £-2,471
3 kW 2382 kWh 1739 kWh 643 kWh £449 £64 £514 £11,354 22.1 yrs £-1,081
4 kW 3176 kWh 2318 kWh 858 kWh £599 £86 £685 £13,388 19.5 yrs £309
5 kW 3970 kWh 2898 kWh 1072 kWh £749 £107 £856 £15,423 18.0 yrs £1,698
6 kW 4764 kWh 3478 kWh 1286 kWh £899 £129 £1,027 £17,457 17.0 yrs £3,088
7 kW 5558 kWh 4057 kWh 1501 kWh £1,048 £150 £1,198 £19,492 16.3 yrs £4,478
8 kW 6352 kWh 4637 kWh 1715 kWh £1,198 £172 £1,370 £21,526 15.7 yrs £5,867

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: £869, Upfront: £17,173, Break-even: 19.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 1191 kWh 397 kWh £308 £40 £347 £11,069 31.9 yrs £-4,120
3 kW 2382 kWh 1786 kWh 595 kWh £462 £60 £521 £13,104 25.1 yrs £-2,680
4 kW 3176 kWh 2382 kWh 794 kWh £616 £79 £695 £15,138 21.8 yrs £-1,240
5 kW 3970 kWh 2977 kWh 992 kWh £769 £99 £869 £17,173 19.8 yrs £200
6 kW 4764 kWh 3573 kWh 1191 kWh £923 £119 £1,042 £19,207 18.4 yrs £1,640
7 kW 5558 kWh 4168 kWh 1389 kWh £1,077 £139 £1,216 £21,242 17.5 yrs £3,080
8 kW 6352 kWh 4764 kWh 1588 kWh £1,231 £159 £1,390 £23,276 16.7 yrs £4,520

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: £881, Upfront: £19,623, Break-even: 22.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1588 kWh 1223 kWh 365 kWh £316 £37 £352 £13,519 38.4 yrs £-6,469
3 kW 2382 kWh 1834 kWh 548 kWh £474 £55 £529 £15,554 29.4 yrs £-4,979
4 kW 3176 kWh 2445 kWh 730 kWh £632 £73 £705 £17,588 24.9 yrs £-3,489
5 kW 3970 kWh 3057 kWh 913 kWh £790 £91 £881 £19,623 22.3 yrs £-1,999
6 kW 4764 kWh 3668 kWh 1096 kWh £948 £110 £1,057 £21,657 20.5 yrs £-508
7 kW 5558 kWh 4280 kWh 1278 kWh £1,106 £128 £1,234 £23,692 19.2 yrs £982
8 kW 6352 kWh 4891 kWh 1461 kWh £1,264 £146 £1,410 £25,726 18.2 yrs £2,472

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 DG10

Figures below are tailored to DG10 — click through for full league tables.

Solar Payback Index Rank #2933 of 2997
13.7 years (UK avg 11.3 years)
~£891 /yr • £12,207 upfront
Standing-Charge Drag Rank #2088 of 2997
23.2% (UK avg 21.7%) drag on savings
£206 fixed • ~£891 /yr value

Your Area at a Glance

Your Electricity Rate
25.84p/kWh
Daily Fixed Charge
56.55p/day
Local Sunshine
794kWh/kW
A 1 kW system generates ~794 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 North, Clydesdale East

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

DG3 (Dumfries and Galloway)
≈23.1 km away
Local sunshine: ~829 kWh/kWp · +4% vs DG10
DG11 (Dumfries and Galloway)
≈24.2 km away
Local sunshine: ~875 kWh/kWp · +10% vs DG10
DG1 (Dumfries and Galloway)
≈30.7 km away
Local sunshine: ~881 kWh/kWp · +11% vs DG10
DG4 (Dumfries and Galloway)
≈31.4 km away
Local sunshine: ~829 kWh/kWp · +4% vs DG10
DG2 (Dumfries and Galloway)
≈31.6 km away
Local sunshine: ~881 kWh/kWp · +11% vs DG10
ML12 (South Lanarkshire)
≈32.4 km away
Local sunshine: ~811 kWh/kWp · +2% vs DG10

Similar sunshine across the UK

IV5 (Highland)
~793 kWh/kWp · -0% vs DG10
PH42 (Highland)
~793 kWh/kWp · -0% vs DG10
LL47 (Gwynedd)
~795 kWh/kWp · +0% vs DG10