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Solar panel cost in Stroud (GL12)

See realistic solar installation costs, savings and payback for GL12 (Stroud) 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
10.3 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£951
What you save every year
Profit Over 25 Years
£13,997
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 Midlands, the current unit rate is 25.33p/kWh with a 59.71p/day standing charge. Your postcode’s south-facing sunshine yield is 982 kWh/kW — 40 above the regional median (942).

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 982 kWh per year on a south-facing roof. We value self-used electricity at 25.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.3p/kWh
Standing charge
59.7p/day
Sunshine yield (south)
982 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: £792, Upfront: £8,139, Break-even: 10.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 786 kWh 1178 kWh £199 £118 £317 £3,256 10.3 yrs £3,081
3 kW 2946 kWh 1178 kWh 1768 kWh £299 £177 £475 £4,883 10.3 yrs £4,622
4 kW 3928 kWh 1571 kWh 2357 kWh £398 £236 £634 £6,511 10.3 yrs £6,163
5 kW 4910 kWh 1964 kWh 2946 kWh £498 £295 £792 £8,139 10.3 yrs £7,704
6 kW 5892 kWh 2357 kWh 3535 kWh £597 £354 £951 £9,767 10.3 yrs £9,244
7 kW 6874 kWh 2750 kWh 4125 kWh £697 £412 £1,109 £11,394 10.3 yrs £10,785
8 kW 7856 kWh 3143 kWh 4714 kWh £796 £471 £1,267 £13,022 10.3 yrs £12,326

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: £943, Upfront: £10,239, Break-even: 10.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 1178 kWh 786 kWh £299 £79 £377 £5,356 14.2 yrs £2,186
3 kW 2946 kWh 1768 kWh 1178 kWh £448 £118 £566 £6,983 12.3 yrs £4,329
4 kW 3928 kWh 2357 kWh 1571 kWh £597 £157 £754 £8,611 11.4 yrs £6,472
5 kW 4910 kWh 2946 kWh 1964 kWh £746 £196 £943 £10,239 10.9 yrs £8,615
6 kW 5892 kWh 3535 kWh 2357 kWh £896 £236 £1,131 £11,867 10.5 yrs £10,758
7 kW 6874 kWh 4125 kWh 2750 kWh £1,045 £275 £1,320 £13,494 10.2 yrs £12,900
8 kW 7856 kWh 4714 kWh 3143 kWh £1,194 £314 £1,508 £15,122 10.0 yrs £15,043

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: £1,018, Upfront: £11,639, Break-even: 11.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 1375 kWh 589 kWh £348 £59 £407 £6,756 16.6 yrs £1,388
3 kW 2946 kWh 2062 kWh 884 kWh £522 £88 £611 £8,383 13.7 yrs £3,832
4 kW 3928 kWh 2750 kWh 1178 kWh £697 £118 £814 £10,011 12.3 yrs £6,276
5 kW 4910 kWh 3437 kWh 1473 kWh £871 £147 £1,018 £11,639 11.4 yrs £8,720
6 kW 5892 kWh 4125 kWh 1768 kWh £1,045 £177 £1,222 £13,267 10.9 yrs £11,164
7 kW 6874 kWh 4812 kWh 2062 kWh £1,219 £206 £1,425 £14,894 10.5 yrs £13,608
8 kW 7856 kWh 5499 kWh 2357 kWh £1,393 £236 £1,629 £16,522 10.1 yrs £16,052

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: £1,041, Upfront: £13,389, Break-even: 12.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 1434 kWh 530 kWh £363 £53 £416 £8,506 20.4 yrs £-181
3 kW 2946 kWh 2151 kWh 795 kWh £545 £80 £624 £10,133 16.2 yrs £2,353
4 kW 3928 kWh 2868 kWh 1061 kWh £726 £106 £832 £11,761 14.1 yrs £4,887
5 kW 4910 kWh 3584 kWh 1326 kWh £908 £133 £1,041 £13,389 12.9 yrs £7,422
6 kW 5892 kWh 4301 kWh 1591 kWh £1,090 £159 £1,249 £15,017 12.0 yrs £9,956
7 kW 6874 kWh 5018 kWh 1856 kWh £1,271 £186 £1,457 £16,644 11.4 yrs £12,490
8 kW 7856 kWh 5735 kWh 2121 kWh £1,453 £212 £1,665 £18,272 11.0 yrs £15,025

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: £1,056, Upfront: £15,139, Break-even: 14.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 1473 kWh 491 kWh £373 £49 £422 £10,256 24.3 yrs £-1,811
3 kW 2946 kWh 2210 kWh 737 kWh £560 £74 £633 £11,883 18.8 yrs £784
4 kW 3928 kWh 2946 kWh 982 kWh £746 £98 £844 £13,511 16.0 yrs £3,378
5 kW 4910 kWh 3683 kWh 1228 kWh £933 £123 £1,056 £15,139 14.3 yrs £5,973
6 kW 5892 kWh 4419 kWh 1473 kWh £1,119 £147 £1,267 £16,767 13.2 yrs £8,567
7 kW 6874 kWh 5156 kWh 1719 kWh £1,306 £172 £1,478 £18,394 12.4 yrs £11,162
8 kW 7856 kWh 5892 kWh 1964 kWh £1,493 £196 £1,689 £20,022 11.9 yrs £13,757

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: £1,071, Upfront: £17,589, Break-even: 16.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1964 kWh 1512 kWh 452 kWh £383 £45 £428 £12,706 29.7 yrs £-4,140
3 kW 2946 kWh 2269 kWh 678 kWh £575 £68 £642 £14,333 22.3 yrs £-1,486
4 kW 3928 kWh 3025 kWh 903 kWh £766 £90 £857 £15,961 18.6 yrs £1,169
5 kW 4910 kWh 3781 kWh 1129 kWh £958 £113 £1,071 £17,589 16.4 yrs £3,824
6 kW 5892 kWh 4537 kWh 1355 kWh £1,149 £136 £1,285 £19,217 15.0 yrs £6,479
7 kW 6874 kWh 5293 kWh 1581 kWh £1,341 £158 £1,499 £20,844 13.9 yrs £9,133
8 kW 7856 kWh 6049 kWh 1807 kWh £1,532 £181 £1,713 £22,472 13.1 yrs £11,788

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 Stroud

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 GL12

Figures below are tailored to GL12 — click through for full league tables.

Big-Roof Britain Rank #348 of 2182
5.8 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #1362 of 2996
10.3 years (UK avg 10.8 years)
~£950 /yr • £9,767 upfront
Standing-Charge Drag Rank #992 of 2996
22.9% (UK avg 26.6%) drag on savings
£218 fixed • ~£950 /yr value
Aspect Penalty View ranking →
East −20.0% West −20.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in GL12

Monthly generation per kilowatt of solar panels

kWh 37 Jan 50 Feb 84 Mar 112 Apr 121 May 119 Jun 121 Jul 106 Aug 92 Sep 65 Oct 43 Nov 31 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.2% 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 39 kWh per month; the average month produces around 82 kWh. So a typical 4 kW home system would generate roughly 158 kWh in winter, or 327 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.33p/kWh
Daily Fixed Charge
59.71p/day
Local Sunshine
982kWh/kW
A 1 kW system generates ~982 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

Houses: 80% • Flats: 11% • Bungalows: 8% Based on 3,924 properties

Coverage

Stroud (57%)|South Gloucestershire (42%)|Cotswold (1%)

Areas Covered

Wotton-under-Edge, Charfield, Kingswood, Chipping Sodbury & Cotswold Edge, Frampton Cotterell, Cam West, Thornbury, Grumbolds Ash with Avening + 1 more

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 Midlands

GL11 (Stroud)
≈6.8 km away
Local sunshine: ~959 kWh/kWp · -2% vs GL12
GL9 (South Gloucestershire)
≈8.2 km away
Local sunshine: ~990 kWh/kWp · +1% vs GL12
GL13 (Stroud)
≈9.4 km away
Local sunshine: ~985 kWh/kWp · +0% vs GL12
BS37 (South Gloucestershire)
≈10.8 km away
Local sunshine: ~975 kWh/kWp · -1% vs GL12
BS35 (South Gloucestershire)
≈11.4 km away
Local sunshine: ~999 kWh/kWp · +2% vs GL12
BS17 (South Gloucestershire)
≈12.0 km away
Local sunshine: ~978 kWh/kWp · -0% vs GL12

Similar sunshine across the UK

OX9 (South Oxfordshire)
~982 kWh/kWp · +0% vs GL12
MK98 (Milton Keynes)
~982 kWh/kWp · +0% vs GL12
HP19 (Buckinghamshire)
~982 kWh/kWp · +0% vs GL12