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Solar panel cost in South Gloucestershire (BS80)

See realistic solar installation costs, savings and payback for BS80 (South Gloucestershire) 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
9.5 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,025
What you save every year
Profit Over 25 Years
£15,854
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 Western, the current unit rate is 26.39p/kWh with a 57.89p/day standing charge. Your postcode’s south-facing sunshine yield is 1032 kWh/kW — 18 above the regional median (1013).

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 1032 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
57.9p/day
Sunshine yield (south)
1032 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: £854, Upfront: £8,139, Break-even: 9.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2063 kWh 825 kWh 1238 kWh £218 £124 £342 £3,256 9.5 yrs £3,577
3 kW 3095 kWh 1238 kWh 1857 kWh £327 £186 £512 £4,883 9.5 yrs £5,365
4 kW 4127 kWh 1651 kWh 2476 kWh £436 £248 £683 £6,511 9.5 yrs £7,153
5 kW 5158 kWh 2063 kWh 3095 kWh £545 £310 £854 £8,139 9.5 yrs £8,942
6 kW 6190 kWh 2476 kWh 3714 kWh £653 £371 £1,025 £9,767 9.5 yrs £10,730
7 kW 7222 kWh 2889 kWh 4333 kWh £762 £433 £1,196 £11,394 9.5 yrs £12,519
8 kW 8254 kWh 3301 kWh 4952 kWh £871 £495 £1,366 £13,022 9.5 yrs £14,307

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: £1,023, Upfront: £10,239, Break-even: 10.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2063 kWh 1238 kWh 825 kWh £327 £83 £409 £5,356 13.1 yrs £2,829
3 kW 3095 kWh 1857 kWh 1238 kWh £490 £124 £614 £6,983 11.4 yrs £5,294
4 kW 4127 kWh 2476 kWh 1651 kWh £653 £165 £819 £8,611 10.5 yrs £7,759
5 kW 5158 kWh 3095 kWh 2063 kWh £817 £206 £1,023 £10,239 10.0 yrs £10,224
6 kW 6190 kWh 3714 kWh 2476 kWh £980 £248 £1,228 £11,867 9.7 yrs £12,688
7 kW 7222 kWh 4333 kWh 2889 kWh £1,144 £289 £1,432 £13,494 9.4 yrs £15,153
8 kW 8254 kWh 4952 kWh 3301 kWh £1,307 £330 £1,637 £15,122 9.2 yrs £17,618

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: £1,108, Upfront: £11,639, Break-even: 10.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2063 kWh 1444 kWh 619 kWh £381 £62 £443 £6,756 15.2 yrs £2,106
3 kW 3095 kWh 2167 kWh 929 kWh £572 £93 £665 £8,383 12.6 yrs £4,909
4 kW 4127 kWh 2889 kWh 1238 kWh £762 £124 £886 £10,011 11.3 yrs £7,712
5 kW 5158 kWh 3611 kWh 1548 kWh £953 £155 £1,108 £11,639 10.5 yrs £10,515
6 kW 6190 kWh 4333 kWh 1857 kWh £1,144 £186 £1,329 £13,267 10.0 yrs £13,318
7 kW 7222 kWh 5055 kWh 2167 kWh £1,334 £217 £1,551 £14,894 9.6 yrs £16,121
8 kW 8254 kWh 5777 kWh 2476 kWh £1,525 £248 £1,772 £16,522 9.3 yrs £18,923

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: £1,133, Upfront: £13,389, 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 2063 kWh 1506 kWh 557 kWh £398 £56 £453 £8,506 18.8 yrs £559
3 kW 3095 kWh 2259 kWh 836 kWh £596 £84 £680 £10,133 14.9 yrs £3,463
4 kW 4127 kWh 3013 kWh 1114 kWh £795 £111 £906 £11,761 13.0 yrs £6,368
5 kW 5158 kWh 3766 kWh 1393 kWh £994 £139 £1,133 £13,389 11.8 yrs £9,272
6 kW 6190 kWh 4519 kWh 1671 kWh £1,193 £167 £1,360 £15,017 11.0 yrs £12,176
7 kW 7222 kWh 5272 kWh 1950 kWh £1,391 £195 £1,586 £16,644 10.5 yrs £15,081
8 kW 8254 kWh 6025 kWh 2228 kWh £1,590 £223 £1,813 £18,272 10.1 yrs £17,985

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: £1,150, Upfront: £15,139, Break-even: 13.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2063 kWh 1548 kWh 516 kWh £408 £52 £460 £10,256 22.3 yrs £-1,056
3 kW 3095 kWh 2321 kWh 774 kWh £613 £77 £690 £11,883 17.2 yrs £1,916
4 kW 4127 kWh 3095 kWh 1032 kWh £817 £103 £920 £13,511 14.7 yrs £4,888
5 kW 5158 kWh 3869 kWh 1290 kWh £1,021 £129 £1,150 £15,139 13.2 yrs £7,860
6 kW 6190 kWh 4643 kWh 1548 kWh £1,225 £155 £1,380 £16,767 12.2 yrs £10,832
7 kW 7222 kWh 5416 kWh 1805 kWh £1,429 £181 £1,610 £18,394 11.4 yrs £13,804
8 kW 8254 kWh 6190 kWh 2063 kWh £1,634 £206 £1,840 £20,022 10.9 yrs £16,776

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: £1,167, Upfront: £17,589, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2063 kWh 1589 kWh 475 kWh £419 £47 £467 £12,706 27.2 yrs £-3,371
3 kW 3095 kWh 2383 kWh 712 kWh £629 £71 £700 £14,333 20.5 yrs £-331
4 kW 4127 kWh 3178 kWh 949 kWh £839 £95 £933 £15,961 17.1 yrs £2,709
5 kW 5158 kWh 3972 kWh 1186 kWh £1,048 £119 £1,167 £17,589 15.1 yrs £5,748
6 kW 6190 kWh 4766 kWh 1424 kWh £1,258 £142 £1,400 £19,217 13.7 yrs £8,788
7 kW 7222 kWh 5561 kWh 1661 kWh £1,467 £166 £1,634 £20,844 12.8 yrs £11,828
8 kW 8254 kWh 6355 kWh 1898 kWh £1,677 £190 £1,867 £22,472 12.0 yrs £14,867

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 South Gloucestershire

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 BS80

Figures below are tailored to BS80 — click through for full league tables.

Solar Payback Index Rank #265 of 2996
9.5 years (UK avg 10.8 years)
~£1,025 /yr • £9,767 upfront
Standing-Charge Drag Rank #664 of 2996
20.6% (UK avg 26.6%) drag on savings
£211 fixed • ~£1,025 /yr value
Aspect Penalty View ranking →
East −20.4% West −22.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BS80

Monthly generation per kilowatt of solar panels

kWh 38 Jan 56 Feb 90 Mar 119 Apr 129 May 124 Jun 127 Jul 111 Aug 95 Sep 67 Oct 44 Nov 32 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.9% 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 42 kWh per month; the average month produces around 86 kWh. So a typical 4 kW home system would generate roughly 168 kWh in winter, or 344 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.39p/kWh
Daily Fixed Charge
57.89p/day
Local Sunshine
1032kWh/kW
A 1 kW system generates ~1032 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

South Gloucestershire (89%)|North Somerset (11%)

Areas Covered

Filton, Weston-super-Mare South

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 Western

BS34 (South Gloucestershire)
≈0.7 km away
Local sunshine: ~989 kWh/kWp · -4% vs BS80
BS32 (South Gloucestershire)
≈1.9 km away
Local sunshine: ~988 kWh/kWp · -4% vs BS80
BS12 (South Gloucestershire)
≈2.3 km away
Local sunshine: ~983 kWh/kWp · -5% vs BS80
BS10 (Bristol, City of)
≈3.2 km away
Local sunshine: ~992 kWh/kWp · -4% vs BS80
BS7 (Bristol, City of)
≈4.1 km away
Local sunshine: ~992 kWh/kWp · -4% vs BS80
BS9 (Bristol, City of)
≈4.9 km away
Local sunshine: ~996 kWh/kWp · -3% vs BS80

Similar sunshine across the UK

SO3 (Eastleigh)
~1,032 kWh/kWp · +0% vs BS80
SO32 (Winchester)
~1,032 kWh/kWp · +0% vs BS80
ME19 (Tonbridge and Malling)
~1,032 kWh/kWp · +0% vs BS80