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Solar panel cost in Somerset (BA6)

See realistic solar installation costs, savings and payback for BA6 (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
9.7 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£835
What you save every year
Profit Over 25 Years
£12,741
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 1009 kWh/kW — 4 below the regional median (1013).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1009 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)
1009 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: £835, Upfront: £8,139, Break-even: 9.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2018 kWh 807 kWh 1211 kWh £213 £121 £334 £3,256 9.7 yrs £3,426
3 kW 3027 kWh 1211 kWh 1816 kWh £320 £182 £501 £4,883 9.7 yrs £5,139
4 kW 4036 kWh 1614 kWh 2421 kWh £426 £242 £668 £6,511 9.7 yrs £6,852
5 kW 5045 kWh 2018 kWh 3027 kWh £533 £303 £835 £8,139 9.7 yrs £8,565
6 kW 6053 kWh 2421 kWh 3632 kWh £639 £363 £1,002 £9,767 9.7 yrs £10,278
7 kW 7062 kWh 2825 kWh 4237 kWh £746 £424 £1,169 £11,394 9.7 yrs £11,991
8 kW 8071 kWh 3229 kWh 4843 kWh £852 £484 £1,336 £13,022 9.7 yrs £13,704

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: £1,001, Upfront: £10,239, Break-even: 10.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2018 kWh 1211 kWh 807 kWh £320 £81 £400 £5,356 13.4 yrs £2,649
3 kW 3027 kWh 1816 kWh 1211 kWh £479 £121 £600 £6,983 11.6 yrs £5,023
4 kW 4036 kWh 2421 kWh 1614 kWh £639 £161 £800 £8,611 10.8 yrs £7,398
5 kW 5045 kWh 3027 kWh 2018 kWh £799 £202 £1,001 £10,239 10.2 yrs £9,772
6 kW 6053 kWh 3632 kWh 2421 kWh £959 £242 £1,201 £11,867 9.9 yrs £12,146
7 kW 7062 kWh 4237 kWh 2825 kWh £1,118 £282 £1,401 £13,494 9.6 yrs £14,521
8 kW 8071 kWh 4843 kWh 3229 kWh £1,278 £323 £1,601 £15,122 9.4 yrs £16,895

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: £1,083, Upfront: £11,639, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2018 kWh 1412 kWh 605 kWh £373 £61 £433 £6,756 15.6 yrs £1,910
3 kW 3027 kWh 2119 kWh 908 kWh £559 £91 £650 £8,383 12.9 yrs £4,615
4 kW 4036 kWh 2825 kWh 1211 kWh £746 £121 £867 £10,011 11.6 yrs £7,320
5 kW 5045 kWh 3531 kWh 1513 kWh £932 £151 £1,083 £11,639 10.7 yrs £10,026
6 kW 6053 kWh 4237 kWh 1816 kWh £1,118 £182 £1,300 £13,267 10.2 yrs £12,731
7 kW 7062 kWh 4944 kWh 2119 kWh £1,305 £212 £1,517 £14,894 9.8 yrs £15,436
8 kW 8071 kWh 5650 kWh 2421 kWh £1,491 £242 £1,733 £16,522 9.5 yrs £18,141

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: £1,108, 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 2018 kWh 1473 kWh 545 kWh £389 £54 £443 £8,506 19.2 yrs £359
3 kW 3027 kWh 2210 kWh 817 kWh £583 £82 £665 £10,133 15.2 yrs £3,163
4 kW 4036 kWh 2946 kWh 1090 kWh £777 £109 £886 £11,761 13.3 yrs £5,967
5 kW 5045 kWh 3683 kWh 1362 kWh £972 £136 £1,108 £13,389 12.1 yrs £8,772
6 kW 6053 kWh 4419 kWh 1634 kWh £1,166 £163 £1,330 £15,017 11.3 yrs £11,576
7 kW 7062 kWh 5156 kWh 1907 kWh £1,361 £191 £1,551 £16,644 10.7 yrs £14,380
8 kW 8071 kWh 5892 kWh 2179 kWh £1,555 £218 £1,773 £18,272 10.3 yrs £17,185

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: £1,125, 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 2018 kWh 1513 kWh 504 kWh £399 £50 £450 £10,256 22.8 yrs £-1,259
3 kW 3027 kWh 2270 kWh 757 kWh £599 £76 £675 £11,883 17.6 yrs £1,611
4 kW 4036 kWh 3027 kWh 1009 kWh £799 £101 £900 £13,511 15.0 yrs £4,482
5 kW 5045 kWh 3783 kWh 1261 kWh £998 £126 £1,125 £15,139 13.5 yrs £7,352
6 kW 6053 kWh 4540 kWh 1513 kWh £1,198 £151 £1,349 £16,767 12.4 yrs £10,223
7 kW 7062 kWh 5297 kWh 1766 kWh £1,398 £177 £1,574 £18,394 11.7 yrs £13,093
8 kW 8071 kWh 6053 kWh 2018 kWh £1,598 £202 £1,799 £20,022 11.1 yrs £15,964

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: £1,141, Upfront: £17,589, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2018 kWh 1554 kWh 464 kWh £410 £46 £456 £12,706 27.8 yrs £-3,577
3 kW 3027 kWh 2331 kWh 696 kWh £615 £70 £685 £14,333 20.9 yrs £-640
4 kW 4036 kWh 3107 kWh 928 kWh £820 £93 £913 £15,961 17.5 yrs £2,296
5 kW 5045 kWh 3884 kWh 1160 kWh £1,025 £116 £1,141 £17,589 15.4 yrs £5,233
6 kW 6053 kWh 4661 kWh 1392 kWh £1,230 £139 £1,369 £19,217 14.0 yrs £8,170
7 kW 7062 kWh 5438 kWh 1624 kWh £1,435 £162 £1,598 £20,844 13.0 yrs £11,106
8 kW 8071 kWh 6215 kWh 1856 kWh £1,640 £186 £1,826 £22,472 12.3 yrs £14,043

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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Insights for BA6

Figures below are tailored to BA6 — click through for full league tables.

Big-Roof Britain Rank #951 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #414 of 2996
9.7 years (UK avg 10.8 years)
~£835 /yr • £8,139 upfront
Standing-Charge Drag Rank #1454 of 2996
25.3% (UK avg 26.6%) drag on savings
£211 fixed • ~£835 /yr value
Aspect Penalty View ranking →
East −20.1% West −20.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BA6

Monthly generation per kilowatt of solar panels

kWh 40 Jan 55 Feb 89 Mar 115 Apr 124 May 120 Jun 122 Jul 108 Aug 92 Sep 66 Oct 45 Nov 33 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.5% 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 84 kWh. So a typical 4 kW home system would generate roughly 170 kWh in winter, or 336 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.39p/kWh
Daily Fixed Charge
57.89p/day
Local Sunshine
1009kWh/kW
A 1 kW system generates ~1009 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 69% • Flats: 18% • Bungalows: 12% Based on 3,991 properties

Coverage

Somerset (100%)

Areas Covered

Glastonbury, Mendip South, Mendip West, King Alfred, Street

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

BA16 (Somerset)
≈3.3 km away
Local sunshine: ~1,009 kWh/kWp · -0% vs BA6
BA5 (Somerset)
≈8.0 km away
Local sunshine: ~988 kWh/kWp · -2% vs BA6
TA11 (Somerset)
≈10.2 km away
Local sunshine: ~1,014 kWh/kWp · +0% vs BA6
BS28 (Somerset)
≈11.0 km away
Local sunshine: ~1,012 kWh/kWp · +0% vs BA6
BA4 (Somerset)
≈12.5 km away
Local sunshine: ~996 kWh/kWp · -1% vs BA6
TA7 (Somerset)
≈14.7 km away
Local sunshine: ~1,015 kWh/kWp · +1% vs BA6

Similar sunshine across the UK

CF99 (Cardiff)
~1,009 kWh/kWp · +0% vs BA6
BA22 (Somerset)
~1,009 kWh/kWp · -0% vs BA6
CF91 (Cardiff)
~1,009 kWh/kWp · -0% vs BA6