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Solar panel cost in Somerset (BS26)

See realistic solar installation costs, savings and payback for BS26 (Somerset) 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
9.8 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£999
What you save every year
Profit Over 25 Years
£15,205
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 1006 kWh/kW — 8 below 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 1006 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)
1006 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: £832, Upfront: £8,139, Break-even: 9.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 804 kWh 1207 kWh £212 £121 £333 £3,256 9.8 yrs £3,403
3 kW 3017 kWh 1207 kWh 1810 kWh £318 £181 £499 £4,883 9.8 yrs £5,105
4 kW 4022 kWh 1609 kWh 2413 kWh £425 £241 £666 £6,511 9.8 yrs £6,807
5 kW 5028 kWh 2011 kWh 3017 kWh £531 £302 £832 £8,139 9.8 yrs £8,509
6 kW 6033 kWh 2413 kWh 3620 kWh £637 £362 £999 £9,767 9.8 yrs £10,210
7 kW 7039 kWh 2815 kWh 4223 kWh £743 £422 £1,165 £11,394 9.8 yrs £11,912
8 kW 8044 kWh 3218 kWh 4826 kWh £849 £483 £1,332 £13,022 9.8 yrs £13,614

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: £997, Upfront: £10,239, 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 2011 kWh 1207 kWh 804 kWh £318 £80 £399 £5,356 13.4 yrs £2,622
3 kW 3017 kWh 1810 kWh 1207 kWh £478 £121 £598 £6,983 11.7 yrs £4,983
4 kW 4022 kWh 2413 kWh 1609 kWh £637 £161 £798 £8,611 10.8 yrs £7,344
5 kW 5028 kWh 3017 kWh 2011 kWh £796 £201 £997 £10,239 10.3 yrs £9,705
6 kW 6033 kWh 3620 kWh 2413 kWh £955 £241 £1,197 £11,867 9.9 yrs £12,066
7 kW 7039 kWh 4223 kWh 2815 kWh £1,114 £282 £1,396 £13,494 9.7 yrs £14,427
8 kW 8044 kWh 4826 kWh 3218 kWh £1,274 £322 £1,595 £15,122 9.5 yrs £16,787

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: £1,080, Upfront: £11,639, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 1408 kWh 603 kWh £371 £60 £432 £6,756 15.6 yrs £1,881
3 kW 3017 kWh 2112 kWh 905 kWh £557 £90 £648 £8,383 12.9 yrs £4,572
4 kW 4022 kWh 2815 kWh 1207 kWh £743 £121 £864 £10,011 11.6 yrs £7,262
5 kW 5028 kWh 3519 kWh 1508 kWh £929 £151 £1,080 £11,639 10.8 yrs £9,953
6 kW 6033 kWh 4223 kWh 1810 kWh £1,114 £181 £1,295 £13,267 10.2 yrs £12,643
7 kW 7039 kWh 4927 kWh 2112 kWh £1,300 £211 £1,511 £14,894 9.9 yrs £15,334
8 kW 8044 kWh 5631 kWh 2413 kWh £1,486 £241 £1,727 £16,522 9.6 yrs £18,024

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: £1,104, Upfront: £13,389, Break-even: 12.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 1468 kWh 543 kWh £387 £54 £442 £8,506 19.3 yrs £329
3 kW 3017 kWh 2202 kWh 814 kWh £581 £81 £663 £10,133 15.3 yrs £3,118
4 kW 4022 kWh 2936 kWh 1086 kWh £775 £109 £883 £11,761 13.3 yrs £5,908
5 kW 5028 kWh 3670 kWh 1357 kWh £969 £136 £1,104 £13,389 12.1 yrs £8,697
6 kW 6033 kWh 4404 kWh 1629 kWh £1,162 £163 £1,325 £15,017 11.3 yrs £11,487
7 kW 7039 kWh 5138 kWh 1900 kWh £1,356 £190 £1,546 £16,644 10.8 yrs £14,276
8 kW 8044 kWh 5872 kWh 2172 kWh £1,550 £217 £1,767 £18,272 10.3 yrs £17,065

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: £1,121, Upfront: £15,139, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 1508 kWh 503 kWh £398 £50 £448 £10,256 22.9 yrs £-1,289
3 kW 3017 kWh 2262 kWh 754 kWh £597 £75 £672 £11,883 17.7 yrs £1,566
4 kW 4022 kWh 3017 kWh 1006 kWh £796 £101 £897 £13,511 15.1 yrs £4,421
5 kW 5028 kWh 3771 kWh 1257 kWh £995 £126 £1,121 £15,139 13.5 yrs £7,277
6 kW 6033 kWh 4525 kWh 1508 kWh £1,194 £151 £1,345 £16,767 12.5 yrs £10,132
7 kW 7039 kWh 5279 kWh 1760 kWh £1,393 £176 £1,569 £18,394 11.7 yrs £12,987
8 kW 8044 kWh 6033 kWh 2011 kWh £1,592 £201 £1,793 £20,022 11.2 yrs £15,843

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: £1,137, Upfront: £17,589, Break-even: 15.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 1549 kWh 463 kWh £409 £46 £455 £12,706 27.9 yrs £-3,607
3 kW 3017 kWh 2323 kWh 694 kWh £613 £69 £682 £14,333 21.0 yrs £-686
4 kW 4022 kWh 3097 kWh 925 kWh £817 £93 £910 £15,961 17.5 yrs £2,235
5 kW 5028 kWh 3871 kWh 1156 kWh £1,022 £116 £1,137 £17,589 15.5 yrs £5,156
6 kW 6033 kWh 4646 kWh 1388 kWh £1,226 £139 £1,365 £19,217 14.1 yrs £8,078
7 kW 7039 kWh 5420 kWh 1619 kWh £1,430 £162 £1,592 £20,844 13.1 yrs £10,999
8 kW 8044 kWh 6194 kWh 1850 kWh £1,635 £185 £1,820 £22,472 12.3 yrs £13,920

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 Somerset

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for BS26

Figures below are tailored to BS26 — click through for full league tables.

Big-Roof Britain Rank #170 of 2182
6.3 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #583 of 2996
9.8 years (UK avg 10.8 years)
~£999 /yr • £9,767 upfront
Standing-Charge Drag Rank #724 of 2996
21.1% (UK avg 26.6%) drag on savings
£211 fixed • ~£999 /yr value
Aspect Penalty View ranking →
East −19.9% West −21.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BS26

Monthly generation per kilowatt of solar panels

kWh 38 Jan 54 Feb 89 Mar 117 Apr 125 May 121 Jun 122 Jul 107 Aug 92 Sep 65 Oct 44 Nov 32 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.3% 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 41 kWh per month; the average month produces around 84 kWh. So a typical 4 kW home system would generate roughly 165 kWh in winter, or 335 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.39p/kWh
Daily Fixed Charge
57.89p/day
Local Sunshine
1006kWh/kW
A 1 kW system generates ~1006 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: 70% • Flats: 13% • Bungalows: 16% Based on 1,314 properties

Coverage

Somerset (93%)|North Somerset (7%)

Areas Covered

Brent, Cheddar, Banwell & Winscombe, Hutton & Locking

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

BS25 (North Somerset)
≈3.7 km away
Local sunshine: ~978 kWh/kWp · -3% vs BS26
BS27 (Somerset)
≈4.9 km away
Local sunshine: ~979 kWh/kWp · -3% vs BS26
BS29 (North Somerset)
≈5.1 km away
Local sunshine: ~953 kWh/kWp · -5% vs BS26
BS28 (Somerset)
≈7.1 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs BS26
BS24 (North Somerset)
≈7.7 km away
Local sunshine: ~1,027 kWh/kWp · +2% vs BS26
BS22 (North Somerset)
≈9.9 km away
Local sunshine: ~1,029 kWh/kWp · +2% vs BS26

Similar sunshine across the UK

E18 (Redbridge)
~1,006 kWh/kWp · -0% vs BS26
PE23 (East Lindsey)
~1,006 kWh/kWp · +0% vs BS26
SE3 (Greenwich)
~1,005 kWh/kWp · -0% vs BS26