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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in PE15 (Fenland)

See if solar pays off for you in Fenland — price, savings and payback in under a minute (official UK data).

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
12.1 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,005
What you save every year
Profit Over 25 Years
£12,916
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 Eastern, the current unit rate is 26.53p/kWh with a 48.25p/day standing charge. Your postcode’s south-facing sunshine yield is 1008 kWh/kW — 1 below the regional median (1009).

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 1008 kWh per year on a south-facing roof. We value self-used electricity at 26.5p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.5p/kWh
Standing charge
48.2p/day
Sunshine yield (south)
1008 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: £837, Upfront: £10,173, 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 2016 kWh 807 kWh 1210 kWh £214 £121 £335 £4,069 12.1 yrs £2,631
3 kW 3025 kWh 1210 kWh 1815 kWh £321 £181 £502 £6,104 12.1 yrs £3,946
4 kW 4033 kWh 1613 kWh 2420 kWh £428 £242 £670 £8,138 12.1 yrs £5,261
5 kW 5041 kWh 2016 kWh 3025 kWh £535 £302 £837 £10,173 12.1 yrs £6,576
6 kW 6049 kWh 2420 kWh 3630 kWh £642 £363 £1,005 £12,207 12.1 yrs £7,892
7 kW 7058 kWh 2823 kWh 4235 kWh £749 £423 £1,172 £14,242 12.1 yrs £9,207
8 kW 8066 kWh 3226 kWh 4840 kWh £856 £484 £1,340 £16,276 12.1 yrs £10,522

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: £1,004, Upfront: £12,273, 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 2016 kWh 1210 kWh 807 kWh £321 £81 £402 £6,169 15.4 yrs £1,864
3 kW 3025 kWh 1815 kWh 1210 kWh £481 £121 £602 £8,204 13.6 yrs £3,846
4 kW 4033 kWh 2420 kWh 1613 kWh £642 £161 £803 £10,238 12.7 yrs £5,828
5 kW 5041 kWh 3025 kWh 2016 kWh £802 £202 £1,004 £12,273 12.2 yrs £7,810
6 kW 6049 kWh 3630 kWh 2420 kWh £963 £242 £1,205 £14,307 11.9 yrs £9,791
7 kW 7058 kWh 4235 kWh 2823 kWh £1,123 £282 £1,406 £16,342 11.6 yrs £11,773
8 kW 8066 kWh 4840 kWh 3226 kWh £1,284 £323 £1,607 £18,376 11.4 yrs £13,755

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: £1,087, Upfront: £13,673, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2016 kWh 1412 kWh 605 kWh £374 £60 £435 £7,569 17.4 yrs £1,130
3 kW 3025 kWh 2117 kWh 907 kWh £562 £91 £652 £9,604 14.7 yrs £3,446
4 kW 4033 kWh 2823 kWh 1210 kWh £749 £121 £870 £11,638 13.4 yrs £5,761
5 kW 5041 kWh 3529 kWh 1512 kWh £936 £151 £1,087 £13,673 12.6 yrs £8,076
6 kW 6049 kWh 4235 kWh 1815 kWh £1,123 £181 £1,305 £15,707 12.0 yrs £10,391
7 kW 7058 kWh 4940 kWh 2117 kWh £1,311 £212 £1,522 £17,742 11.7 yrs £12,707
8 kW 8066 kWh 5646 kWh 2420 kWh £1,498 £242 £1,740 £19,776 11.4 yrs £15,022

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: £1,112, Upfront: £15,423, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2016 kWh 1472 kWh 544 kWh £391 £54 £445 £9,319 20.9 yrs £-420
3 kW 3025 kWh 2208 kWh 817 kWh £586 £82 £667 £11,354 17.0 yrs £1,996
4 kW 4033 kWh 2944 kWh 1089 kWh £781 £109 £890 £13,388 15.0 yrs £4,411
5 kW 5041 kWh 3680 kWh 1361 kWh £976 £136 £1,112 £15,423 13.9 yrs £6,826
6 kW 6049 kWh 4416 kWh 1633 kWh £1,172 £163 £1,335 £17,457 13.1 yrs £9,241
7 kW 7058 kWh 5152 kWh 1906 kWh £1,367 £191 £1,557 £19,492 12.5 yrs £11,657
8 kW 8066 kWh 5888 kWh 2178 kWh £1,562 £218 £1,780 £21,526 12.1 yrs £14,072

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: £1,129, Upfront: £17,173, Break-even: 15.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2016 kWh 1512 kWh 504 kWh £401 £50 £452 £11,069 24.5 yrs £-2,036
3 kW 3025 kWh 2269 kWh 756 kWh £602 £76 £677 £13,104 19.3 yrs £446
4 kW 4033 kWh 3025 kWh 1008 kWh £802 £101 £903 £15,138 16.8 yrs £2,928
5 kW 5041 kWh 3781 kWh 1260 kWh £1,003 £126 £1,129 £17,173 15.2 yrs £5,410
6 kW 6049 kWh 4537 kWh 1512 kWh £1,204 £151 £1,355 £19,207 14.2 yrs £7,891
7 kW 7058 kWh 5293 kWh 1764 kWh £1,404 £176 £1,581 £21,242 13.4 yrs £10,373
8 kW 8066 kWh 6049 kWh 2016 kWh £1,605 £202 £1,807 £23,276 12.9 yrs £12,855

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: £1,146, Upfront: £19,623, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2016 kWh 1553 kWh 464 kWh £412 £46 £458 £13,519 29.5 yrs £-4,353
3 kW 3025 kWh 2329 kWh 696 kWh £618 £70 £687 £15,554 22.6 yrs £-1,804
4 kW 4033 kWh 3105 kWh 928 kWh £824 £93 £917 £17,588 19.2 yrs £744
5 kW 5041 kWh 3882 kWh 1159 kWh £1,030 £116 £1,146 £19,623 17.1 yrs £3,293
6 kW 6049 kWh 4658 kWh 1391 kWh £1,236 £139 £1,375 £21,657 15.8 yrs £5,841
7 kW 7058 kWh 5434 kWh 1623 kWh £1,442 £162 £1,604 £23,692 14.8 yrs £8,390
8 kW 8066 kWh 6211 kWh 1855 kWh £1,648 £186 £1,833 £25,726 14.0 yrs £10,939

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 PE15

Figures below are tailored to PE15 — click through for full league tables.

Big-Roof Britain Rank #477 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #695 of 2997
10.6 years (UK avg 11.3 years)
~£1,155 /yr • £12,207 upfront
Standing-Charge Drag Rank #322 of 2997
15.2% (UK avg 21.7%) drag on savings
£176 fixed • ~£1,155 /yr value

Your Area at a Glance

Your Electricity Rate
26.53p/kWh
Daily Fixed Charge
48.25p/day
Local Sunshine
1008kWh/kW
A 1 kW system generates ~1008 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: 61% • Flats: 10% • Bungalows: 28% Based on 9,377 properties

Coverage

Fenland (100%)

Areas Covered

March West & Benwick, March North, Doddington & Wimblington, March East, March South, Chatteris North & Manea, Elm & Christchurch, Ramsey + 1 more

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q4 2025

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 Eastern

PE16 (Fenland)
≈11.1 km away
Local sunshine: ~1,006 kWh/kWp · -0% vs PE15
PE14 (King's Lynn and West Norfolk)
≈13.2 km away
Local sunshine: ~1,014 kWh/kWp · +1% vs PE15
PE13 (Fenland)
≈13.7 km away
Local sunshine: ~1,015 kWh/kWp · +1% vs PE15
PE26 (Huntingdonshire)
≈17.4 km away
Local sunshine: ~1,012 kWh/kWp · +0% vs PE15
CB6 (East Cambridgeshire)
≈19.9 km away
Local sunshine: ~1,001 kWh/kWp · -1% vs PE15
PE38 (King's Lynn and West Norfolk)
≈20.5 km away
Local sunshine: ~998 kWh/kWp · -1% vs PE15

Similar sunshine across the UK

OX12 (Vale of White Horse)
~1,008 kWh/kWp · -0% vs PE15
CF14 (Cardiff)
~1,008 kWh/kWp · +0% vs PE15
RH11 (Crawley)
~1,008 kWh/kWp · +0% vs PE15