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Solar panel cost in Somerset (TA10)

See realistic solar installation costs, savings and payback for TA10 (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
£9,767
What you pay to get started
Annual Benefit
£1,010
What you save every year
Profit Over 25 Years
£15,493
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 1017 kWh/kW — 4 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 1017 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)
1017 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: £842, 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 2034 kWh 814 kWh 1221 kWh £215 £122 £337 £3,256 9.7 yrs £3,480
3 kW 3051 kWh 1221 kWh 1831 kWh £322 £183 £505 £4,883 9.7 yrs £5,221
4 kW 4069 kWh 1627 kWh 2441 kWh £429 £244 £674 £6,511 9.7 yrs £6,961
5 kW 5086 kWh 2034 kWh 3051 kWh £537 £305 £842 £8,139 9.7 yrs £8,701
6 kW 6103 kWh 2441 kWh 3662 kWh £644 £366 £1,010 £9,767 9.7 yrs £10,441
7 kW 7120 kWh 2848 kWh 4272 kWh £752 £427 £1,179 £11,394 9.7 yrs £12,182
8 kW 8137 kWh 3255 kWh 4882 kWh £859 £488 £1,347 £13,022 9.7 yrs £13,922

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: £1,009, 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 2034 kWh 1221 kWh 814 kWh £322 £81 £403 £5,356 13.3 yrs £2,714
3 kW 3051 kWh 1831 kWh 1221 kWh £483 £122 £605 £6,983 11.5 yrs £5,121
4 kW 4069 kWh 2441 kWh 1627 kWh £644 £163 £807 £8,611 10.7 yrs £7,528
5 kW 5086 kWh 3051 kWh 2034 kWh £805 £203 £1,009 £10,239 10.2 yrs £9,935
6 kW 6103 kWh 3662 kWh 2441 kWh £966 £244 £1,210 £11,867 9.8 yrs £12,342
7 kW 7120 kWh 4272 kWh 2848 kWh £1,127 £285 £1,412 £13,494 9.6 yrs £14,749
8 kW 8137 kWh 4882 kWh 3255 kWh £1,288 £325 £1,614 £15,122 9.4 yrs £17,157

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: £1,092, 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 2034 kWh 1424 kWh 610 kWh £376 £61 £437 £6,756 15.5 yrs £1,981
3 kW 3051 kWh 2136 kWh 915 kWh £564 £92 £655 £8,383 12.8 yrs £4,721
4 kW 4069 kWh 2848 kWh 1221 kWh £752 £122 £874 £10,011 11.5 yrs £7,462
5 kW 5086 kWh 3560 kWh 1526 kWh £939 £153 £1,092 £11,639 10.7 yrs £10,202
6 kW 6103 kWh 4272 kWh 1831 kWh £1,127 £183 £1,310 £13,267 10.1 yrs £12,943
7 kW 7120 kWh 4984 kWh 2136 kWh £1,315 £214 £1,529 £14,894 9.7 yrs £15,683
8 kW 8137 kWh 5696 kWh 2441 kWh £1,503 £244 £1,747 £16,522 9.5 yrs £18,424

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: £1,117, Upfront: £13,389, Break-even: 12.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2034 kWh 1485 kWh 549 kWh £392 £55 £447 £8,506 19.0 yrs £431
3 kW 3051 kWh 2228 kWh 824 kWh £588 £82 £670 £10,133 15.1 yrs £3,272
4 kW 4069 kWh 2970 kWh 1099 kWh £784 £110 £894 £11,761 13.2 yrs £6,112
5 kW 5086 kWh 3713 kWh 1373 kWh £980 £137 £1,117 £13,389 12.0 yrs £8,953
6 kW 6103 kWh 4455 kWh 1648 kWh £1,176 £165 £1,340 £15,017 11.2 yrs £11,793
7 kW 7120 kWh 5198 kWh 1922 kWh £1,372 £192 £1,564 £16,644 10.6 yrs £14,634
8 kW 8137 kWh 5940 kWh 2197 kWh £1,568 £220 £1,787 £18,272 10.2 yrs £17,474

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: £1,134, Upfront: £15,139, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2034 kWh 1526 kWh 509 kWh £403 £51 £453 £10,256 22.6 yrs £-1,186
3 kW 3051 kWh 2289 kWh 763 kWh £604 £76 £680 £11,883 17.5 yrs £1,722
4 kW 4069 kWh 3051 kWh 1017 kWh £805 £102 £907 £13,511 14.9 yrs £4,629
5 kW 5086 kWh 3814 kWh 1271 kWh £1,007 £127 £1,134 £15,139 13.4 yrs £7,536
6 kW 6103 kWh 4577 kWh 1526 kWh £1,208 £153 £1,360 £16,767 12.3 yrs £10,443
7 kW 7120 kWh 5340 kWh 1780 kWh £1,409 £178 £1,587 £18,394 11.6 yrs £13,350
8 kW 8137 kWh 6103 kWh 2034 kWh £1,611 £203 £1,814 £20,022 11.0 yrs £16,258

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: £1,150, Upfront: £17,589, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2034 kWh 1566 kWh 468 kWh £413 £47 £460 £12,706 27.6 yrs £-3,502
3 kW 3051 kWh 2350 kWh 702 kWh £620 £70 £690 £14,333 20.8 yrs £-528
4 kW 4069 kWh 3133 kWh 936 kWh £827 £94 £920 £15,961 17.3 yrs £2,446
5 kW 5086 kWh 3916 kWh 1170 kWh £1,033 £117 £1,150 £17,589 15.3 yrs £5,419
6 kW 6103 kWh 4699 kWh 1404 kWh £1,240 £140 £1,380 £19,217 13.9 yrs £8,393
7 kW 7120 kWh 5482 kWh 1638 kWh £1,447 £164 £1,611 £20,844 12.9 yrs £11,367
8 kW 8137 kWh 6266 kWh 1872 kWh £1,654 £187 £1,841 £22,472 12.2 yrs £14,341

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 TA10

Figures below are tailored to TA10 — click through for full league tables.

Big-Roof Britain Rank #323 of 2182
5.9 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #551 of 2996
9.7 years (UK avg 10.8 years)
~£1,010 /yr • £9,767 upfront
Standing-Charge Drag Rank #705 of 2996
20.9% (UK avg 26.6%) drag on savings
£211 fixed • ~£1,010 /yr value
Aspect Penalty View ranking →
East −20.2% West −20.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in TA10

Monthly generation per kilowatt of solar panels

kWh 40 Jan 55 Feb 89 Mar 116 Apr 125 May 122 Jun 123 Jul 109 Aug 94 Sep 67 Oct 45 Nov 34 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.3% 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 43 kWh per month; the average month produces around 85 kWh. So a typical 4 kW home system would generate roughly 171 kWh in winter, or 339 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.39p/kWh
Daily Fixed Charge
57.89p/day
Local Sunshine
1017kWh/kW
A 1 kW system generates ~1017 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: 72% • Flats: 9% • Bungalows: 19% Based on 2,669 properties

Coverage

Somerset (100%)

Areas Covered

Curry Rivel & Langport, Somerton, South Petherton & Islemoor, Martock

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

TA11 (Somerset)
≈7.1 km away
Local sunshine: ~1,014 kWh/kWp · -0% vs TA10
TA12 (Somerset)
≈8.0 km away
Local sunshine: ~1,017 kWh/kWp · +0% vs TA10
TA13 (Somerset)
≈9.7 km away
Local sunshine: ~1,020 kWh/kWp · +0% vs TA10
TA14 (Somerset)
≈10.6 km away
Local sunshine: ~1,018 kWh/kWp · +0% vs TA10
BA16 (Somerset)
≈11.5 km away
Local sunshine: ~1,009 kWh/kWp · -1% vs TA10
TA15 (Somerset)
≈12.1 km away
Local sunshine: ~1,018 kWh/kWp · +0% vs TA10

Similar sunshine across the UK

ME99 (Maidstone)
~1,017 kWh/kWp · -0% vs TA10
IP22 (South Norfolk)
~1,017 kWh/kWp · -0% vs TA10
CF36 (Bridgend)
~1,017 kWh/kWp · +0% vs TA10