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Solar panel cost in Isle of Wight (PO34)

See realistic solar installation costs, savings and payback for PO34 (Isle of Wight) 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
12.2 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,001
What you save every year
Profit Over 25 Years
£12,823
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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, the current unit rate is 23.36p/kWh with a 49.69p/day standing charge. Your postcode’s south-facing sunshine yield is 1087 kWh/kW — 86 above the regional median (1001).

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 1087 kWh per year on a south-facing roof. We value self-used electricity at 23.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.4p/kWh
Standing charge
49.7p/day
Sunshine yield (south)
1087 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: £834, Upfront: £10,173, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 870 kWh 1305 kWh £203 £130 £334 £4,069 12.2 yrs £2,606
3 kW 3262 kWh 1305 kWh 1957 kWh £305 £196 £501 £6,104 12.2 yrs £3,908
4 kW 4350 kWh 1740 kWh 2610 kWh £406 £261 £667 £8,138 12.2 yrs £5,211
5 kW 5437 kWh 2175 kWh 3262 kWh £508 £326 £834 £10,173 12.2 yrs £6,514
6 kW 6525 kWh 2610 kWh 3915 kWh £610 £391 £1,001 £12,207 12.2 yrs £7,817
7 kW 7612 kWh 3045 kWh 4567 kWh £711 £457 £1,168 £14,242 12.2 yrs £9,119
8 kW 8700 kWh 3480 kWh 5220 kWh £813 £522 £1,335 £16,276 12.2 yrs £10,422

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £980, Upfront: £12,273, Break-even: 12.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 1305 kWh 870 kWh £305 £87 £392 £6,169 15.7 yrs £1,668
3 kW 3262 kWh 1957 kWh 1305 kWh £457 £130 £588 £8,204 14.0 yrs £3,552
4 kW 4350 kWh 2610 kWh 1740 kWh £610 £174 £784 £10,238 13.1 yrs £5,436
5 kW 5437 kWh 3262 kWh 2175 kWh £762 £217 £980 £12,273 12.5 yrs £7,320
6 kW 6525 kWh 3915 kWh 2610 kWh £915 £261 £1,176 £14,307 12.2 yrs £9,204
7 kW 7612 kWh 4567 kWh 3045 kWh £1,067 £304 £1,371 £16,342 11.9 yrs £11,088
8 kW 8700 kWh 5220 kWh 3480 kWh £1,219 £348 £1,567 £18,376 11.7 yrs £12,971

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,052, Upfront: £13,673, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 1522 kWh 652 kWh £356 £65 £421 £7,569 18.0 yrs £849
3 kW 3262 kWh 2284 kWh 979 kWh £533 £98 £631 £9,604 15.2 yrs £3,024
4 kW 4350 kWh 3045 kWh 1305 kWh £711 £130 £842 £11,638 13.8 yrs £5,198
5 kW 5437 kWh 3806 kWh 1631 kWh £889 £163 £1,052 £13,673 13.0 yrs £7,373
6 kW 6525 kWh 4567 kWh 1957 kWh £1,067 £196 £1,263 £15,707 12.4 yrs £9,547
7 kW 7612 kWh 5329 kWh 2284 kWh £1,245 £228 £1,473 £17,742 12.0 yrs £11,722
8 kW 8700 kWh 6090 kWh 2610 kWh £1,423 £261 £1,684 £19,776 11.7 yrs £13,896

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,074, Upfront: £15,423, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 1588 kWh 587 kWh £371 £59 £430 £9,319 21.7 yrs £-727
3 kW 3262 kWh 2382 kWh 881 kWh £556 £88 £644 £11,354 17.6 yrs £1,535
4 kW 4350 kWh 3175 kWh 1174 kWh £742 £117 £859 £13,388 15.6 yrs £3,797
5 kW 5437 kWh 3969 kWh 1468 kWh £927 £147 £1,074 £15,423 14.4 yrs £6,058
6 kW 6525 kWh 4763 kWh 1762 kWh £1,113 £176 £1,289 £17,457 13.5 yrs £8,320
7 kW 7612 kWh 5557 kWh 2055 kWh £1,298 £206 £1,504 £19,492 13.0 yrs £10,582
8 kW 8700 kWh 6351 kWh 2349 kWh £1,484 £235 £1,718 £21,526 12.5 yrs £12,843

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,089, Upfront: £17,173, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 1631 kWh 544 kWh £381 £54 £435 £11,069 25.4 yrs £-2,360
3 kW 3262 kWh 2447 kWh 816 kWh £572 £82 £653 £13,104 20.1 yrs £-41
4 kW 4350 kWh 3262 kWh 1087 kWh £762 £109 £871 £15,138 17.4 yrs £2,279
5 kW 5437 kWh 4078 kWh 1359 kWh £953 £136 £1,089 £17,173 15.8 yrs £4,599
6 kW 6525 kWh 4894 kWh 1631 kWh £1,143 £163 £1,306 £19,207 14.7 yrs £6,919
7 kW 7612 kWh 5709 kWh 1903 kWh £1,334 £190 £1,524 £21,242 13.9 yrs £9,239
8 kW 8700 kWh 6525 kWh 2175 kWh £1,524 £217 £1,742 £23,276 13.4 yrs £11,558

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,103, Upfront: £19,623, Break-even: 17.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2175 kWh 1675 kWh 500 kWh £391 £50 £441 £13,519 30.6 yrs £-4,694
3 kW 3262 kWh 2512 kWh 750 kWh £587 £75 £662 £15,554 23.5 yrs £-2,316
4 kW 4350 kWh 3349 kWh 1000 kWh £782 £100 £882 £17,588 19.9 yrs £62
5 kW 5437 kWh 4187 kWh 1251 kWh £978 £125 £1,103 £19,623 17.8 yrs £2,440
6 kW 6525 kWh 5024 kWh 1501 kWh £1,174 £150 £1,324 £21,657 16.4 yrs £4,817
7 kW 7612 kWh 5862 kWh 1751 kWh £1,369 £175 £1,544 £23,692 15.3 yrs £7,195
8 kW 8700 kWh 6699 kWh 2001 kWh £1,565 £200 £1,765 £25,726 14.6 yrs £9,573

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for PO34

Figures below are tailored to PO34 — click through for full league tables.

Big-Roof Britain Rank #102 of 2182
6.6 kWp (UK avg 5.1 kWp)
~14 panels (≈430 W)
Solar Payback Index Rank #126 of 2997
10.9 years (UK avg 12.6 years)
~£1,118 /yr • £12,207 upfront
Standing-Charge Drag Rank #22 of 2997
14.9% (UK avg 24.6%) drag on savings
£167 fixed • ~£1,118 /yr value
Aspect Penalty View ranking →
East −20.6% West −22.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO34

Monthly generation per kilowatt of solar panels

kWh 40 Jan 56 Feb 94 Mar 124 Apr 131 May 134 Jun 136 Jul 118 Aug 100 Sep 69 Oct 48 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.0% of an average month (Dec–Feb)

Best / worst month: Jul / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 44 kWh per month; the average month produces around 91 kWh. So a typical 4 kW home system would generate roughly 178 kWh in winter, or 362 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.36p/kWh
Daily Fixed Charge
49.69p/day
Local Sunshine
1087kWh/kW
A 1 kW system generates ~1087 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: 53% • Flats: 15% • Bungalows: 29% Based on 786 properties

Coverage

Isle of Wight (100%)

Areas Covered

Nettlestone & Seaview, Ryde South East

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q1 2026

Installation costs: MCS certified installer data, March 2025

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

PO33 (Isle of Wight)
≈3.6 km away
Local sunshine: ~1,088 kWh/kWp · +0% vs PO34
PO35 (Isle of Wight)
≈3.7 km away
Local sunshine: ~1,111 kWh/kWp · +2% vs PO34
PO36 (Isle of Wight)
≈7.5 km away
Local sunshine: ~1,110 kWh/kWp · +2% vs PO34
PO5 (Portsmouth)
≈8.4 km away
Local sunshine: ~1,084 kWh/kWp · -0% vs PO34
PO4 (Portsmouth)
≈9.0 km away
Local sunshine: ~1,084 kWh/kWp · -0% vs PO34
PO1 (Portsmouth)
≈9.4 km away
Local sunshine: ~1,084 kWh/kWp · -0% vs PO34

Similar sunshine across the UK

CO14 (Tendring)
~1,087 kWh/kWp · +0% vs PO34
TN26 (Ashford)
~1,088 kWh/kWp · +0% vs PO34
CT2 (Canterbury)
~1,087 kWh/kWp · -0% vs PO34