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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in IP6 (Mid Suffolk)

See if solar pays off for you in Mid Suffolk — 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
11.8 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,032
What you save every year
Profit Over 25 Years
£13,604
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 1036 kWh/kW — 27 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 1036 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)
1036 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: £860, Upfront: £10,173, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2072 kWh 829 kWh 1243 kWh £220 £124 £344 £4,069 11.8 yrs £2,814
3 kW 3108 kWh 1243 kWh 1865 kWh £330 £186 £516 £6,104 11.8 yrs £4,221
4 kW 4143 kWh 1657 kWh 2486 kWh £440 £249 £688 £8,138 11.8 yrs £5,628
5 kW 5179 kWh 2072 kWh 3108 kWh £550 £311 £860 £10,173 11.8 yrs £7,035
6 kW 6215 kWh 2486 kWh 3729 kWh £660 £373 £1,032 £12,207 11.8 yrs £8,442
7 kW 7251 kWh 2900 kWh 4351 kWh £769 £435 £1,205 £14,242 11.8 yrs £9,849
8 kW 8287 kWh 3315 kWh 4972 kWh £879 £497 £1,377 £16,276 11.8 yrs £11,256

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: £1,032, Upfront: £12,273, Break-even: 11.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2072 kWh 1243 kWh 829 kWh £330 £83 £413 £6,169 15.0 yrs £2,084
3 kW 3108 kWh 1865 kWh 1243 kWh £495 £124 £619 £8,204 13.3 yrs £4,176
4 kW 4143 kWh 2486 kWh 1657 kWh £660 £166 £825 £10,238 12.4 yrs £6,268
5 kW 5179 kWh 3108 kWh 2072 kWh £824 £207 £1,032 £12,273 11.9 yrs £8,360
6 kW 6215 kWh 3729 kWh 2486 kWh £989 £249 £1,238 £14,307 11.6 yrs £10,451
7 kW 7251 kWh 4351 kWh 2900 kWh £1,154 £290 £1,444 £16,342 11.3 yrs £12,543
8 kW 8287 kWh 4972 kWh 3315 kWh £1,319 £331 £1,651 £18,376 11.1 yrs £14,635

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: £1,117, Upfront: £13,673, 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 2072 kWh 1450 kWh 622 kWh £385 £62 £447 £7,569 16.9 yrs £1,369
3 kW 3108 kWh 2175 kWh 932 kWh £577 £93 £670 £9,604 14.3 yrs £3,803
4 kW 4143 kWh 2900 kWh 1243 kWh £769 £124 £894 £11,638 13.0 yrs £6,237
5 kW 5179 kWh 3625 kWh 1554 kWh £962 £155 £1,117 £13,673 12.2 yrs £8,672
6 kW 6215 kWh 4351 kWh 1865 kWh £1,154 £186 £1,341 £15,707 11.7 yrs £11,106
7 kW 7251 kWh 5076 kWh 2175 kWh £1,347 £218 £1,564 £17,742 11.3 yrs £13,540
8 kW 8287 kWh 5801 kWh 2486 kWh £1,539 £249 £1,788 £19,776 11.1 yrs £15,975

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: £1,143, Upfront: £15,423, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2072 kWh 1512 kWh 559 kWh £401 £56 £457 £9,319 20.4 yrs £-176
3 kW 3108 kWh 2269 kWh 839 kWh £602 £84 £686 £11,354 16.6 yrs £2,361
4 kW 4143 kWh 3025 kWh 1119 kWh £802 £112 £914 £13,388 14.6 yrs £4,898
5 kW 5179 kWh 3781 kWh 1398 kWh £1,003 £140 £1,143 £15,423 13.5 yrs £7,435
6 kW 6215 kWh 4537 kWh 1678 kWh £1,204 £168 £1,371 £17,457 12.7 yrs £9,973
7 kW 7251 kWh 5293 kWh 1958 kWh £1,404 £196 £1,600 £19,492 12.2 yrs £12,510
8 kW 8287 kWh 6049 kWh 2237 kWh £1,605 £224 £1,829 £21,526 11.8 yrs £15,047

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: £1,160, Upfront: £17,173, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2072 kWh 1554 kWh 518 kWh £412 £52 £464 £11,069 23.9 yrs £-1,789
3 kW 3108 kWh 2331 kWh 777 kWh £618 £78 £696 £13,104 18.8 yrs £817
4 kW 4143 kWh 3108 kWh 1036 kWh £824 £104 £928 £15,138 16.3 yrs £3,422
5 kW 5179 kWh 3884 kWh 1295 kWh £1,031 £129 £1,160 £17,173 14.8 yrs £6,028
6 kW 6215 kWh 4661 kWh 1554 kWh £1,237 £155 £1,392 £19,207 13.8 yrs £8,633
7 kW 7251 kWh 5438 kWh 1813 kWh £1,443 £181 £1,624 £21,242 13.1 yrs £11,239
8 kW 8287 kWh 6215 kWh 2072 kWh £1,649 £207 £1,856 £23,276 12.5 yrs £13,845

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: £1,177, Upfront: £19,623, Break-even: 16.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2072 kWh 1595 kWh 476 kWh £423 £48 £471 £13,519 28.7 yrs £-4,102
3 kW 3108 kWh 2393 kWh 715 kWh £635 £71 £706 £15,554 22.0 yrs £-1,428
4 kW 4143 kWh 3190 kWh 953 kWh £846 £95 £942 £17,588 18.7 yrs £1,246
5 kW 5179 kWh 3988 kWh 1191 kWh £1,058 £119 £1,177 £19,623 16.7 yrs £3,920
6 kW 6215 kWh 4786 kWh 1429 kWh £1,270 £143 £1,413 £21,657 15.3 yrs £6,594
7 kW 7251 kWh 5583 kWh 1668 kWh £1,481 £167 £1,648 £23,692 14.4 yrs £9,268
8 kW 8287 kWh 6381 kWh 1906 kWh £1,693 £191 £1,883 £25,726 13.7 yrs £11,943

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 IP6

Figures below are tailored to IP6 — click through for full league tables.

Big-Roof Britain Rank #632 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #328 of 2997
10.3 years (UK avg 11.3 years)
~£1,187 /yr • £12,207 upfront
Standing-Charge Drag Rank #218 of 2997
14.8% (UK avg 21.7%) drag on savings
£176 fixed • ~£1,187 /yr value

Your Area at a Glance

Your Electricity Rate
26.53p/kWh
Daily Fixed Charge
48.25p/day
Local Sunshine
1036kWh/kW
A 1 kW system generates ~1036 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: 69% • Flats: 9% • Bungalows: 20% Based on 5,084 properties

Coverage

Mid Suffolk (78%)|East Suffolk (17%)|Ipswich (5%)

Areas Covered

Needham Market, Claydon & Barham, Carlford & Fynn Valley, Blakenham, Alexandra, Battisford & Ringshall, Stonham

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

IP8 (Babergh)
≈7.9 km away
Local sunshine: ~1,042 kWh/kWp · +1% vs IP6
IP1 (Ipswich)
≈8.5 km away
Local sunshine: ~1,042 kWh/kWp · +1% vs IP6
IP4 (Ipswich)
≈9.3 km away
Local sunshine: ~1,050 kWh/kWp · +1% vs IP6
IP2 (Ipswich)
≈9.5 km away
Local sunshine: ~1,041 kWh/kWp · +0% vs IP6
IP14 (Mid Suffolk)
≈10.2 km away
Local sunshine: ~1,029 kWh/kWp · -1% vs IP6
IP3 (Ipswich)
≈11.2 km away
Local sunshine: ~1,059 kWh/kWp · +2% vs IP6

Similar sunshine across the UK

CF62 (Vale of Glamorgan)
~1,036 kWh/kWp · -0% vs IP6
EX8 (East Devon)
~1,036 kWh/kWp · +0% vs IP6
SO43 (New Forest)
~1,036 kWh/kWp · -0% vs IP6