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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in PE35 (King's Lynn and West Norfolk)

See if solar pays off for you in King's Lynn and West Norfolk — 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
£1,008
What you save every year
Profit Over 25 Years
£12,983
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 1011 kWh/kW — 2 above 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 1011 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)
1011 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: £840, 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 2022 kWh 809 kWh 1213 kWh £215 £121 £336 £4,069 12.1 yrs £2,648
3 kW 3033 kWh 1213 kWh 1820 kWh £322 £182 £504 £6,104 12.1 yrs £3,972
4 kW 4044 kWh 1617 kWh 2426 kWh £429 £243 £672 £8,138 12.1 yrs £5,296
5 kW 5054 kWh 2022 kWh 3033 kWh £536 £303 £840 £10,173 12.1 yrs £6,621
6 kW 6065 kWh 2426 kWh 3639 kWh £644 £364 £1,008 £12,207 12.1 yrs £7,945
7 kW 7076 kWh 2831 kWh 4246 kWh £751 £425 £1,176 £14,242 12.1 yrs £9,269
8 kW 8087 kWh 3235 kWh 4852 kWh £858 £485 £1,343 £16,276 12.1 yrs £10,593

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: £1,007, 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 2022 kWh 1213 kWh 809 kWh £322 £81 £403 £6,169 15.3 yrs £1,885
3 kW 3033 kWh 1820 kWh 1213 kWh £483 £121 £604 £8,204 13.6 yrs £3,878
4 kW 4044 kWh 2426 kWh 1617 kWh £644 £162 £805 £10,238 12.7 yrs £5,870
5 kW 5054 kWh 3033 kWh 2022 kWh £805 £202 £1,007 £12,273 12.2 yrs £7,863
6 kW 6065 kWh 3639 kWh 2426 kWh £965 £243 £1,208 £14,307 11.8 yrs £9,855
7 kW 7076 kWh 4246 kWh 2831 kWh £1,126 £283 £1,409 £16,342 11.6 yrs £11,848
8 kW 8087 kWh 4852 kWh 3235 kWh £1,287 £323 £1,611 £18,376 11.4 yrs £13,840

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: £1,090, Upfront: £13,673, 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 2022 kWh 1415 kWh 607 kWh £375 £61 £436 £7,569 17.4 yrs £1,153
3 kW 3033 kWh 2123 kWh 910 kWh £563 £91 £654 £9,604 14.7 yrs £3,480
4 kW 4044 kWh 2831 kWh 1213 kWh £751 £121 £872 £11,638 13.3 yrs £5,807
5 kW 5054 kWh 3538 kWh 1516 kWh £939 £152 £1,090 £13,673 12.5 yrs £8,134
6 kW 6065 kWh 4246 kWh 1820 kWh £1,126 £182 £1,308 £15,707 12.0 yrs £10,460
7 kW 7076 kWh 4953 kWh 2123 kWh £1,314 £212 £1,526 £17,742 11.6 yrs £12,787
8 kW 8087 kWh 5661 kWh 2426 kWh £1,502 £243 £1,744 £19,776 11.3 yrs £15,114

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: £1,115, Upfront: £15,423, Break-even: 13.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2022 kWh 1476 kWh 546 kWh £392 £55 £446 £9,319 20.9 yrs £-396
3 kW 3033 kWh 2214 kWh 819 kWh £587 £82 £669 £11,354 17.0 yrs £2,031
4 kW 4044 kWh 2952 kWh 1092 kWh £783 £109 £892 £13,388 15.0 yrs £4,458
5 kW 5054 kWh 3690 kWh 1365 kWh £979 £136 £1,115 £15,423 13.8 yrs £6,885
6 kW 6065 kWh 4428 kWh 1638 kWh £1,175 £164 £1,338 £17,457 13.0 yrs £9,312
7 kW 7076 kWh 5166 kWh 1911 kWh £1,370 £191 £1,562 £19,492 12.5 yrs £11,739
8 kW 8087 kWh 5904 kWh 2184 kWh £1,566 £218 £1,785 £21,526 12.1 yrs £14,166

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: £1,132, 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 2022 kWh 1516 kWh 505 kWh £402 £51 £453 £11,069 24.4 yrs £-2,012
3 kW 3033 kWh 2275 kWh 758 kWh £603 £76 £679 £13,104 19.3 yrs £481
4 kW 4044 kWh 3033 kWh 1011 kWh £805 £101 £906 £15,138 16.7 yrs £2,975
5 kW 5054 kWh 3791 kWh 1264 kWh £1,006 £126 £1,132 £17,173 15.2 yrs £5,469
6 kW 6065 kWh 4549 kWh 1516 kWh £1,207 £152 £1,358 £19,207 14.1 yrs £7,963
7 kW 7076 kWh 5307 kWh 1769 kWh £1,408 £177 £1,585 £21,242 13.4 yrs £10,457
8 kW 8087 kWh 6065 kWh 2022 kWh £1,609 £202 £1,811 £23,276 12.9 yrs £12,951

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: £1,149, 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 2022 kWh 1557 kWh 465 kWh £413 £47 £460 £13,519 29.4 yrs £-4,329
3 kW 3033 kWh 2335 kWh 698 kWh £620 £70 £689 £15,554 22.6 yrs £-1,768
4 kW 4044 kWh 3114 kWh 930 kWh £826 £93 £919 £17,588 19.1 yrs £793
5 kW 5054 kWh 3892 kWh 1163 kWh £1,033 £116 £1,149 £19,623 17.1 yrs £3,353
6 kW 6065 kWh 4670 kWh 1395 kWh £1,239 £140 £1,379 £21,657 15.7 yrs £5,914
7 kW 7076 kWh 5449 kWh 1628 kWh £1,446 £163 £1,608 £23,692 14.7 yrs £8,475
8 kW 8087 kWh 6227 kWh 1860 kWh £1,652 £186 £1,838 £25,726 14.0 yrs £11,035

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 PE35

Figures below are tailored to PE35 — click through for full league tables.

Big-Roof Britain Rank #9 of 2182
7.8 kWp (UK avg 5.1 kWp)
~16 panels (≈430 W)
Solar Payback Index Rank #546 of 2997
10.5 years (UK avg 11.3 years)
~£1,158 /yr • £12,207 upfront
Standing-Charge Drag Rank #358 of 2997
15.2% (UK avg 21.7%) drag on savings
£176 fixed • ~£1,158 /yr value

Your Area at a Glance

Your Electricity Rate
26.53p/kWh
Daily Fixed Charge
48.25p/day
Local Sunshine
1011kWh/kW
A 1 kW system generates ~1011 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: 62% • Flats: 25% • Bungalows: 12% Based on 32 properties

Coverage

King's Lynn and West Norfolk (100%)

Areas Covered

Dersingham

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

PE31 (King's Lynn and West Norfolk)
≈5.4 km away
Local sunshine: ~997 kWh/kWp · -1% vs PE35
PE30 (King's Lynn and West Norfolk)
≈10.7 km away
Local sunshine: ~996 kWh/kWp · -1% vs PE35
PE32 (King's Lynn and West Norfolk)
≈12.3 km away
Local sunshine: ~999 kWh/kWp · -1% vs PE35
PE36 (King's Lynn and West Norfolk)
≈12.4 km away
Local sunshine: ~1,032 kWh/kWp · +2% vs PE35
PE34 (King's Lynn and West Norfolk)
≈13.8 km away
Local sunshine: ~1,000 kWh/kWp · -1% vs PE35
PE33 (King's Lynn and West Norfolk)
≈19.5 km away
Local sunshine: ~999 kWh/kWp · -1% vs PE35

Similar sunshine across the UK

TA20 (Somerset)
~1,011 kWh/kWp · +0% vs PE35
GU33 (East Hampshire)
~1,011 kWh/kWp · -0% vs PE35
GU30 (East Hampshire)
~1,011 kWh/kWp · -0% vs PE35