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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in PE16 (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
12.2 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£835
What you save every year
Profit Over 25 Years
£10,714
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 1006 kWh/kW — 3 below the regional median (1009).

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 1006 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)
1006 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: £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 2012 kWh 805 kWh 1207 kWh £213 £121 £334 £4,069 12.2 yrs £2,615
3 kW 3018 kWh 1207 kWh 1811 kWh £320 £181 £501 £6,104 12.2 yrs £3,922
4 kW 4023 kWh 1609 kWh 2414 kWh £427 £241 £668 £8,138 12.2 yrs £5,230
5 kW 5029 kWh 2012 kWh 3018 kWh £534 £302 £835 £10,173 12.2 yrs £6,537
6 kW 6035 kWh 2414 kWh 3621 kWh £640 £362 £1,003 £12,207 12.2 yrs £7,844
7 kW 7041 kWh 2816 kWh 4225 kWh £747 £422 £1,170 £14,242 12.2 yrs £9,152
8 kW 8047 kWh 3219 kWh 4828 kWh £854 £483 £1,337 £16,276 12.2 yrs £10,459

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: £1,002, Upfront: £12,273, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2012 kWh 1207 kWh 805 kWh £320 £80 £401 £6,169 15.4 yrs £1,845
3 kW 3018 kWh 1811 kWh 1207 kWh £480 £121 £601 £8,204 13.6 yrs £3,817
4 kW 4023 kWh 2414 kWh 1609 kWh £640 £161 £801 £10,238 12.8 yrs £5,790
5 kW 5029 kWh 3018 kWh 2012 kWh £801 £201 £1,002 £12,273 12.3 yrs £7,762
6 kW 6035 kWh 3621 kWh 2414 kWh £961 £241 £1,202 £14,307 11.9 yrs £9,735
7 kW 7041 kWh 4225 kWh 2816 kWh £1,121 £282 £1,402 £16,342 11.7 yrs £11,707
8 kW 8047 kWh 4828 kWh 3219 kWh £1,281 £322 £1,603 £18,376 11.5 yrs £13,680

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: £1,085, 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 2012 kWh 1408 kWh 604 kWh £374 £60 £434 £7,569 17.4 yrs £1,110
3 kW 3018 kWh 2112 kWh 905 kWh £560 £91 £651 £9,604 14.8 yrs £3,415
4 kW 4023 kWh 2816 kWh 1207 kWh £747 £121 £868 £11,638 13.4 yrs £5,720
5 kW 5029 kWh 3521 kWh 1509 kWh £934 £151 £1,085 £13,673 12.6 yrs £8,025
6 kW 6035 kWh 4225 kWh 1811 kWh £1,121 £181 £1,302 £15,707 12.1 yrs £10,330
7 kW 7041 kWh 4929 kWh 2112 kWh £1,308 £211 £1,519 £17,742 11.7 yrs £12,635
8 kW 8047 kWh 5633 kWh 2414 kWh £1,494 £241 £1,736 £19,776 11.4 yrs £14,940

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: £1,110, 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 2012 kWh 1469 kWh 543 kWh £390 £54 £444 £9,319 21.0 yrs £-440
3 kW 3018 kWh 2203 kWh 815 kWh £584 £81 £666 £11,354 17.1 yrs £1,964
4 kW 4023 kWh 2937 kWh 1086 kWh £779 £109 £888 £13,388 15.1 yrs £4,369
5 kW 5029 kWh 3671 kWh 1358 kWh £974 £136 £1,110 £15,423 13.9 yrs £6,774
6 kW 6035 kWh 4406 kWh 1630 kWh £1,169 £163 £1,332 £17,457 13.1 yrs £9,179
7 kW 7041 kWh 5140 kWh 1901 kWh £1,364 £190 £1,554 £19,492 12.5 yrs £11,583
8 kW 8047 kWh 5874 kWh 2173 kWh £1,558 £217 £1,776 £21,526 12.1 yrs £13,988

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: £1,126, 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 2012 kWh 1509 kWh 503 kWh £400 £50 £451 £11,069 24.6 yrs £-2,057
3 kW 3018 kWh 2263 kWh 754 kWh £600 £75 £676 £13,104 19.4 yrs £414
4 kW 4023 kWh 3018 kWh 1006 kWh £801 £101 £901 £15,138 16.8 yrs £2,885
5 kW 5029 kWh 3772 kWh 1257 kWh £1,001 £126 £1,126 £17,173 15.2 yrs £5,356
6 kW 6035 kWh 4526 kWh 1509 kWh £1,201 £151 £1,352 £19,207 14.2 yrs £7,828
7 kW 7041 kWh 5281 kWh 1760 kWh £1,401 £176 £1,577 £21,242 13.5 yrs £10,299
8 kW 8047 kWh 6035 kWh 2012 kWh £1,601 £201 £1,802 £23,276 12.9 yrs £12,770

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: £1,143, Upfront: £19,623, Break-even: 17.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2012 kWh 1549 kWh 463 kWh £411 £46 £457 £13,519 29.6 yrs £-4,374
3 kW 3018 kWh 2324 kWh 694 kWh £616 £69 £686 £15,554 22.7 yrs £-1,837
4 kW 4023 kWh 3098 kWh 925 kWh £822 £93 £914 £17,588 19.2 yrs £701
5 kW 5029 kWh 3873 kWh 1157 kWh £1,027 £116 £1,143 £19,623 17.2 yrs £3,239
6 kW 6035 kWh 4647 kWh 1388 kWh £1,233 £139 £1,372 £21,657 15.8 yrs £5,777
7 kW 7041 kWh 5422 kWh 1619 kWh £1,438 £162 £1,600 £23,692 14.8 yrs £8,315
8 kW 8047 kWh 6196 kWh 1851 kWh £1,644 £185 £1,829 £25,726 14.1 yrs £10,852

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 PE16

Figures below are tailored to PE16 — click through for full league tables.

Big-Roof Britain Rank #953 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #696 of 2997
10.6 years (UK avg 11.3 years)
~£960 /yr • £10,173 upfront
Standing-Charge Drag Rank #1093 of 2997
18.3% (UK avg 21.7%) drag on savings
£176 fixed • ~£960 /yr value

Your Area at a Glance

Your Electricity Rate
26.53p/kWh
Daily Fixed Charge
48.25p/day
Local Sunshine
1006kWh/kW
A 1 kW system generates ~1006 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: 69% • Flats: 10% • Bungalows: 20% Based on 3,131 properties

Coverage

Fenland (99%)|Huntingdonshire (1%)

Areas Covered

Chatteris South, Chatteris North & Manea, Warboys, Doddington & Wimblington

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

PE26 (Huntingdonshire)
≈10.8 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs PE16
PE15 (Fenland)
≈11.1 km away
Local sunshine: ~1,008 kWh/kWp · +0% vs PE16
PE17 (Huntingdonshire)
≈13.1 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs PE16
CB6 (East Cambridgeshire)
≈14.6 km away
Local sunshine: ~1,001 kWh/kWp · -0% vs PE16
PE27 (Huntingdonshire)
≈16.0 km away
Local sunshine: ~1,011 kWh/kWp · +0% vs PE16
CB24 (South Cambridgeshire)
≈19.2 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs PE16

Similar sunshine across the UK

RG26 (Basingstoke and Deane)
~1,006 kWh/kWp · +0% vs PE16
SA12 (Neath Port Talbot)
~1,006 kWh/kWp · +0% vs PE16
SE10 (Greenwich)
~1,006 kWh/kWp · -0% vs PE16