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Solar panel cost in Somerset (BA16)

See realistic solar installation costs, savings and payback for BA16 (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
£12,736
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 — 5 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 2017 kWh 807 kWh 1210 kWh £213 £121 £334 £3,256 9.7 yrs £3,424
3 kW 3026 kWh 1210 kWh 1816 kWh £319 £182 £501 £4,883 9.7 yrs £5,137
4 kW 4035 kWh 1614 kWh 2421 kWh £426 £242 £668 £6,511 9.7 yrs £6,849
5 kW 5043 kWh 2017 kWh 3026 kWh £532 £303 £835 £8,139 9.7 yrs £8,561
6 kW 6052 kWh 2421 kWh 3631 kWh £639 £363 £1,002 £9,767 9.7 yrs £10,273
7 kW 7061 kWh 2824 kWh 4236 kWh £745 £424 £1,169 £11,394 9.7 yrs £11,986
8 kW 8070 kWh 3228 kWh 4842 kWh £852 £484 £1,336 £13,022 9.7 yrs £13,698

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: £1,000, 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 2017 kWh 1210 kWh 807 kWh £319 £81 £400 £5,356 13.4 yrs £2,647
3 kW 3026 kWh 1816 kWh 1210 kWh £479 £121 £600 £6,983 11.6 yrs £5,021
4 kW 4035 kWh 2421 kWh 1614 kWh £639 £161 £800 £8,611 10.8 yrs £7,394
5 kW 5043 kWh 3026 kWh 2017 kWh £799 £202 £1,000 £10,239 10.2 yrs £9,768
6 kW 6052 kWh 3631 kWh 2421 kWh £958 £242 £1,200 £11,867 9.9 yrs £12,141
7 kW 7061 kWh 4236 kWh 2824 kWh £1,118 £282 £1,400 £13,494 9.6 yrs £14,515
8 kW 8070 kWh 4842 kWh 3228 kWh £1,278 £323 £1,601 £15,122 9.4 yrs £16,888

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 2017 kWh 1412 kWh 605 kWh £373 £61 £433 £6,756 15.6 yrs £1,908
3 kW 3026 kWh 2118 kWh 908 kWh £559 £91 £650 £8,383 12.9 yrs £4,612
4 kW 4035 kWh 2824 kWh 1210 kWh £745 £121 £866 £10,011 11.6 yrs £7,317
5 kW 5043 kWh 3530 kWh 1513 kWh £932 £151 £1,083 £11,639 10.7 yrs £10,021
6 kW 6052 kWh 4236 kWh 1816 kWh £1,118 £182 £1,300 £13,267 10.2 yrs £12,725
7 kW 7061 kWh 4943 kWh 2118 kWh £1,304 £212 £1,516 £14,894 9.8 yrs £15,429
8 kW 8070 kWh 5649 kWh 2421 kWh £1,491 £242 £1,733 £16,522 9.5 yrs £18,133

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 2017 kWh 1473 kWh 545 kWh £389 £54 £443 £8,506 19.2 yrs £357
3 kW 3026 kWh 2209 kWh 817 kWh £583 £82 £665 £10,133 15.2 yrs £3,160
4 kW 4035 kWh 2945 kWh 1089 kWh £777 £109 £886 £11,761 13.3 yrs £5,963
5 kW 5043 kWh 3682 kWh 1362 kWh £972 £136 £1,108 £13,389 12.1 yrs £8,767
6 kW 6052 kWh 4418 kWh 1634 kWh £1,166 £163 £1,329 £15,017 11.3 yrs £11,570
7 kW 7061 kWh 5154 kWh 1906 kWh £1,360 £191 £1,551 £16,644 10.7 yrs £14,373
8 kW 8070 kWh 5891 kWh 2179 kWh £1,555 £218 £1,772 £18,272 10.3 yrs £17,177

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: £1,124, 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 2017 kWh 1513 kWh 504 kWh £399 £50 £450 £10,256 22.8 yrs £-1,261
3 kW 3026 kWh 2270 kWh 757 kWh £599 £76 £675 £11,883 17.6 yrs £1,608
4 kW 4035 kWh 3026 kWh 1009 kWh £799 £101 £899 £13,511 15.0 yrs £4,478
5 kW 5043 kWh 3783 kWh 1261 kWh £998 £126 £1,124 £15,139 13.5 yrs £7,347
6 kW 6052 kWh 4539 kWh 1513 kWh £1,198 £151 £1,349 £16,767 12.4 yrs £10,217
7 kW 7061 kWh 5296 kWh 1765 kWh £1,398 £177 £1,574 £18,394 11.7 yrs £13,086
8 kW 8070 kWh 6052 kWh 2017 kWh £1,597 £202 £1,799 £20,022 11.1 yrs £15,956

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 2017 kWh 1553 kWh 464 kWh £410 £46 £456 £12,706 27.8 yrs £-3,579
3 kW 3026 kWh 2330 kWh 696 kWh £615 £70 £685 £14,333 20.9 yrs £-643
4 kW 4035 kWh 3107 kWh 928 kWh £820 £93 £913 £15,961 17.5 yrs £2,292
5 kW 5043 kWh 3883 kWh 1160 kWh £1,025 £116 £1,141 £17,589 15.4 yrs £5,228
6 kW 6052 kWh 4660 kWh 1392 kWh £1,230 £139 £1,369 £19,217 14.0 yrs £8,164
7 kW 7061 kWh 5437 kWh 1624 kWh £1,435 £162 £1,597 £20,844 13.1 yrs £11,099
8 kW 8070 kWh 6214 kWh 1856 kWh £1,640 £186 £1,825 £22,472 12.3 yrs £14,035

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 BA16

Figures below are tailored to BA16 — click through for full league tables.

Big-Roof Britain Rank #1078 of 2182
5.0 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #412 of 2996
9.7 years (UK avg 10.8 years)
~£835 /yr • £8,139 upfront
Standing-Charge Drag Rank #1453 of 2996
25.3% (UK avg 26.6%) drag on savings
£211 fixed • ~£835 /yr value
Aspect Penalty View ranking →
East −20.2% West −20.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BA16

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: 66% • Flats: 19% • Bungalows: 14% Based on 3,046 properties

Coverage

Somerset (100%)

Areas Covered

Street, Mendip West, Glastonbury

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

BA6 (Somerset)
≈3.3 km away
Local sunshine: ~1,009 kWh/kWp · +0% vs BA16
TA11 (Somerset)
≈7.6 km away
Local sunshine: ~1,014 kWh/kWp · +0% vs BA16
BA5 (Somerset)
≈11.3 km away
Local sunshine: ~988 kWh/kWp · -2% vs BA16
TA10 (Somerset)
≈11.5 km away
Local sunshine: ~1,017 kWh/kWp · +1% vs BA16
BS28 (Somerset)
≈12.3 km away
Local sunshine: ~1,012 kWh/kWp · +0% vs BA16
TA7 (Somerset)
≈12.7 km away
Local sunshine: ~1,015 kWh/kWp · +1% vs BA16

Similar sunshine across the UK

PE8 (North Northamptonshire)
~1,009 kWh/kWp · +0% vs BA16
CF91 (Cardiff)
~1,009 kWh/kWp · +0% vs BA16
TN16 (Bromley)
~1,009 kWh/kWp · +0% vs BA16