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Solar panel cost in Isle of Wight (PO35)

See realistic solar installation costs, savings and payback for PO35 (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
8.8 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,104
What you save every year
Profit Over 25 Years
£17,845
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, the current unit rate is 26.42p/kWh with a 49.70p/day standing charge. Your postcode’s south-facing sunshine yield is 1111 kWh/kW — 110 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 1111 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
49.7p/day
Sunshine yield (south)
1111 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: £920, Upfront: £8,139, Break-even: 8.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2222 kWh 889 kWh 1333 kWh £235 £133 £368 £3,256 8.8 yrs £4,107
3 kW 3333 kWh 1333 kWh 2000 kWh £352 £200 £552 £4,883 8.8 yrs £6,161
4 kW 4444 kWh 1778 kWh 2666 kWh £470 £267 £736 £6,511 8.8 yrs £8,215
5 kW 5555 kWh 2222 kWh 3333 kWh £587 £333 £920 £8,139 8.8 yrs £10,269
6 kW 6666 kWh 2666 kWh 4000 kWh £704 £400 £1,104 £9,767 8.8 yrs £12,322
7 kW 7777 kWh 3111 kWh 4666 kWh £822 £467 £1,289 £11,394 8.8 yrs £14,376
8 kW 8888 kWh 3555 kWh 5333 kWh £939 £533 £1,473 £13,022 8.8 yrs £16,430

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: £1,103, Upfront: £10,239, Break-even: 9.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2222 kWh 1333 kWh 889 kWh £352 £89 £441 £5,356 12.1 yrs £3,467
3 kW 3333 kWh 2000 kWh 1333 kWh £528 £133 £662 £6,983 10.6 yrs £6,250
4 kW 4444 kWh 2666 kWh 1778 kWh £704 £178 £882 £8,611 9.8 yrs £9,034
5 kW 5555 kWh 3333 kWh 2222 kWh £881 £222 £1,103 £10,239 9.3 yrs £11,817
6 kW 6666 kWh 4000 kWh 2666 kWh £1,057 £267 £1,323 £11,867 9.0 yrs £14,601
7 kW 7777 kWh 4666 kWh 3111 kWh £1,233 £311 £1,544 £13,494 8.7 yrs £17,384
8 kW 8888 kWh 5333 kWh 3555 kWh £1,409 £356 £1,764 £15,122 8.6 yrs £20,167

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: £1,194, Upfront: £11,639, 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 2222 kWh 1555 kWh 667 kWh £411 £67 £478 £6,756 14.1 yrs £2,797
3 kW 3333 kWh 2333 kWh 1000 kWh £616 £100 £716 £8,383 11.7 yrs £5,945
4 kW 4444 kWh 3111 kWh 1333 kWh £822 £133 £955 £10,011 10.5 yrs £9,093
5 kW 5555 kWh 3889 kWh 1667 kWh £1,027 £167 £1,194 £11,639 9.7 yrs £12,241
6 kW 6666 kWh 4666 kWh 2000 kWh £1,233 £200 £1,433 £13,267 9.3 yrs £15,390
7 kW 7777 kWh 5444 kWh 2333 kWh £1,438 £233 £1,672 £14,894 8.9 yrs £18,538
8 kW 8888 kWh 6222 kWh 2666 kWh £1,644 £267 £1,910 £16,522 8.6 yrs £21,686

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: £1,221, Upfront: £13,389, Break-even: 11.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2222 kWh 1622 kWh 600 kWh £429 £60 £489 £8,506 17.4 yrs £1,266
3 kW 3333 kWh 2433 kWh 900 kWh £643 £90 £733 £10,133 13.8 yrs £4,523
4 kW 4444 kWh 3244 kWh 1200 kWh £857 £120 £977 £11,761 12.0 yrs £7,781
5 kW 5555 kWh 4055 kWh 1500 kWh £1,071 £150 £1,221 £13,389 11.0 yrs £11,039
6 kW 6666 kWh 4866 kWh 1800 kWh £1,286 £180 £1,466 £15,017 10.2 yrs £14,297
7 kW 7777 kWh 5677 kWh 2100 kWh £1,500 £210 £1,710 £16,644 9.7 yrs £17,554
8 kW 8888 kWh 6488 kWh 2400 kWh £1,714 £240 £1,954 £18,272 9.4 yrs £20,812

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: £1,240, Upfront: £15,139, 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 2222 kWh 1667 kWh 556 kWh £440 £56 £496 £10,256 20.7 yrs £-339
3 kW 3333 kWh 2500 kWh 833 kWh £660 £83 £744 £11,883 16.0 yrs £2,992
4 kW 4444 kWh 3333 kWh 1111 kWh £881 £111 £992 £13,511 13.6 yrs £6,323
5 kW 5555 kWh 4166 kWh 1389 kWh £1,101 £139 £1,240 £15,139 12.2 yrs £9,654
6 kW 6666 kWh 5000 kWh 1667 kWh £1,321 £167 £1,488 £16,767 11.3 yrs £12,984
7 kW 7777 kWh 5833 kWh 1944 kWh £1,541 £194 £1,735 £18,394 10.6 yrs £16,315
8 kW 8888 kWh 6666 kWh 2222 kWh £1,761 £222 £1,983 £20,022 10.1 yrs £19,646

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: £1,258, Upfront: £17,589, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2222 kWh 1711 kWh 511 kWh £452 £51 £503 £12,706 25.3 yrs £-2,643
3 kW 3333 kWh 2566 kWh 767 kWh £678 £77 £755 £14,333 19.0 yrs £761
4 kW 4444 kWh 3422 kWh 1022 kWh £904 £102 £1,006 £15,961 15.9 yrs £4,165
5 kW 5555 kWh 4277 kWh 1278 kWh £1,130 £128 £1,258 £17,589 14.0 yrs £7,568
6 kW 6666 kWh 5133 kWh 1533 kWh £1,356 £153 £1,509 £19,217 12.7 yrs £10,972
7 kW 7777 kWh 5988 kWh 1789 kWh £1,582 £179 £1,761 £20,844 11.8 yrs £14,376
8 kW 8888 kWh 6844 kWh 2044 kWh £1,808 £204 £2,013 £22,472 11.2 yrs £17,780

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 Isle of Wight

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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Understand DNO, G98 and G99 export limits

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Insights for PO35

Figures below are tailored to PO35 — click through for full league tables.

Big-Roof Britain Rank #113 of 2182
6.5 kWp (UK avg 5.1 kWp)
~14 panels (≈430 W)
Solar Payback Index Rank #52 of 2996
8.8 years (UK avg 10.8 years)
~£1,104 /yr • £9,767 upfront
Standing-Charge Drag Rank #15 of 2996
16.4% (UK avg 26.6%) drag on savings
£181 fixed • ~£1,104 /yr value
Aspect Penalty View ranking →
East −21.0% West −23.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO35

Monthly generation per kilowatt of solar panels

kWh 41 Jan 57 Feb 96 Mar 127 Apr 134 May 137 Jun 140 Jul 122 Aug 102 Sep 70 Oct 48 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.2% 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 45 kWh per month; the average month produces around 93 kWh. So a typical 4 kW home system would generate roughly 179 kWh in winter, or 370 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1111kWh/kW
A 1 kW system generates ~1111 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: 52% • Flats: 17% • Bungalows: 31% Based on 1,161 properties

Coverage

Isle of Wight (100%)

Areas Covered

Bembridge, Ryde South East

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

PO34 (Isle of Wight)
≈3.7 km away
Local sunshine: ~1,087 kWh/kWp · -2% vs PO35
PO36 (Isle of Wight)
≈6.1 km away
Local sunshine: ~1,110 kWh/kWp · -0% vs PO35
PO33 (Isle of Wight)
≈6.7 km away
Local sunshine: ~1,088 kWh/kWp · -2% vs PO35
PO37 (Isle of Wight)
≈8.9 km away
Local sunshine: ~1,108 kWh/kWp · -0% vs PO35
PO5 (Portsmouth)
≈11.4 km away
Local sunshine: ~1,084 kWh/kWp · -2% vs PO35
PO4 (Portsmouth)
≈11.7 km away
Local sunshine: ~1,084 kWh/kWp · -2% vs PO35

Similar sunshine across the UK

CT19 (Folkestone and Hythe)
~1,111 kWh/kWp · +0% vs PO35
CT20 (Folkestone and Hythe)
~1,111 kWh/kWp · -0% vs PO35
CT50 (Folkestone and Hythe)
~1,111 kWh/kWp · +0% vs PO35