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Solar panel cost in Boston (PE21)

See realistic solar installation costs, savings and payback for PE21 (Boston) 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
10.0 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£815
What you save every year
Profit Over 25 Years
£12,224
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 East Midlands, the current unit rate is 25.10p/kWh with a 53.60p/day standing charge. Your postcode’s south-facing sunshine yield is 1016 kWh/kW — 47 above the regional median (968).

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 1016 kWh per year on a south-facing roof. We value self-used electricity at 25.1p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.1p/kWh
Standing charge
53.6p/day
Sunshine yield (south)
1016 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: £815, Upfront: £8,139, Break-even: 10.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2031 kWh 812 kWh 1219 kWh £204 £122 £326 £3,256 10.0 yrs £3,261
3 kW 3047 kWh 1219 kWh 1828 kWh £306 £183 £489 £4,883 10.0 yrs £4,891
4 kW 4062 kWh 1625 kWh 2437 kWh £408 £244 £652 £6,511 10.0 yrs £6,521
5 kW 5078 kWh 2031 kWh 3047 kWh £510 £305 £815 £8,139 10.0 yrs £8,152
6 kW 6094 kWh 2437 kWh 3656 kWh £612 £366 £977 £9,767 10.0 yrs £9,782
7 kW 7109 kWh 2844 kWh 4266 kWh £714 £427 £1,140 £11,394 10.0 yrs £11,412
8 kW 8125 kWh 3250 kWh 4875 kWh £816 £487 £1,303 £13,022 10.0 yrs £13,043

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: £968, Upfront: £10,239, Break-even: 10.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2031 kWh 1219 kWh 812 kWh £306 £81 £387 £5,356 13.8 yrs £2,387
3 kW 3047 kWh 1828 kWh 1219 kWh £459 £122 £581 £6,983 12.0 yrs £4,631
4 kW 4062 kWh 2437 kWh 1625 kWh £612 £162 £774 £8,611 11.1 yrs £6,875
5 kW 5078 kWh 3047 kWh 2031 kWh £765 £203 £968 £10,239 10.6 yrs £9,119
6 kW 6094 kWh 3656 kWh 2437 kWh £918 £244 £1,161 £11,867 10.2 yrs £11,362
7 kW 7109 kWh 4266 kWh 2844 kWh £1,071 £284 £1,355 £13,494 10.0 yrs £13,606
8 kW 8125 kWh 4875 kWh 3250 kWh £1,224 £325 £1,549 £15,122 9.8 yrs £15,850

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: £1,045, Upfront: £11,639, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2031 kWh 1422 kWh 609 kWh £357 £61 £418 £6,756 16.2 yrs £1,601
3 kW 3047 kWh 2133 kWh 914 kWh £535 £91 £627 £8,383 13.4 yrs £4,151
4 kW 4062 kWh 2844 kWh 1219 kWh £714 £122 £836 £10,011 12.0 yrs £6,702
5 kW 5078 kWh 3555 kWh 1523 kWh £892 £152 £1,045 £11,639 11.1 yrs £9,252
6 kW 6094 kWh 4266 kWh 1828 kWh £1,071 £183 £1,253 £13,267 10.6 yrs £11,803
7 kW 7109 kWh 4976 kWh 2133 kWh £1,249 £213 £1,462 £14,894 10.2 yrs £14,353
8 kW 8125 kWh 5687 kWh 2437 kWh £1,428 £244 £1,671 £16,522 9.9 yrs £16,904

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: £1,068, Upfront: £13,389, 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 2031 kWh 1483 kWh 548 kWh £372 £55 £427 £8,506 19.9 yrs £35
3 kW 3047 kWh 2224 kWh 823 kWh £558 £82 £641 £10,133 15.8 yrs £2,677
4 kW 4062 kWh 2966 kWh 1097 kWh £744 £110 £854 £11,761 13.8 yrs £5,320
5 kW 5078 kWh 3707 kWh 1371 kWh £930 £137 £1,068 £13,389 12.5 yrs £7,962
6 kW 6094 kWh 4448 kWh 1645 kWh £1,117 £165 £1,281 £15,017 11.7 yrs £10,605
7 kW 7109 kWh 5190 kWh 1920 kWh £1,303 £192 £1,495 £16,644 11.1 yrs £13,247
8 kW 8125 kWh 5931 kWh 2194 kWh £1,489 £219 £1,708 £18,272 10.7 yrs £15,890

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: £1,083, Upfront: £15,139, 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 2031 kWh 1523 kWh 508 kWh £382 £51 £433 £10,256 23.7 yrs £-1,592
3 kW 3047 kWh 2285 kWh 762 kWh £574 £76 £650 £11,883 18.3 yrs £1,111
4 kW 4062 kWh 3047 kWh 1016 kWh £765 £102 £866 £13,511 15.6 yrs £3,815
5 kW 5078 kWh 3809 kWh 1270 kWh £956 £127 £1,083 £15,139 14.0 yrs £6,519
6 kW 6094 kWh 4570 kWh 1523 kWh £1,147 £152 £1,299 £16,767 12.9 yrs £9,223
7 kW 7109 kWh 5332 kWh 1777 kWh £1,338 £178 £1,516 £18,394 12.1 yrs £11,927
8 kW 8125 kWh 6094 kWh 2031 kWh £1,530 £203 £1,733 £20,022 11.6 yrs £14,631

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: £1,098, Upfront: £17,589, Break-even: 16.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2031 kWh 1564 kWh 467 kWh £393 £47 £439 £12,706 28.9 yrs £-3,920
3 kW 3047 kWh 2346 kWh 701 kWh £589 £70 £659 £14,333 21.8 yrs £-1,155
4 kW 4062 kWh 3128 kWh 934 kWh £785 £93 £879 £15,961 18.2 yrs £1,611
5 kW 5078 kWh 3910 kWh 1168 kWh £981 £117 £1,098 £17,589 16.0 yrs £4,376
6 kW 6094 kWh 4692 kWh 1402 kWh £1,178 £140 £1,318 £19,217 14.6 yrs £7,141
7 kW 7109 kWh 5474 kWh 1635 kWh £1,374 £164 £1,538 £20,844 13.6 yrs £9,906
8 kW 8125 kWh 6256 kWh 1869 kWh £1,570 £187 £1,757 £22,472 12.8 yrs £12,671

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 Boston

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.

Compare solar quotes before you sign

Check what MCS certification means

Understand DNO, G98 and G99 export limits

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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for PE21

Figures below are tailored to PE21 — click through for full league tables.

Big-Roof Britain Rank #1300 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1145 of 2996
10.0 years (UK avg 10.8 years)
~£815 /yr • £8,139 upfront
Standing-Charge Drag Rank #1225 of 2996
24.0% (UK avg 26.6%) drag on savings
£196 fixed • ~£815 /yr value
Aspect Penalty View ranking →
East −23.4% West −21.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PE21

Monthly generation per kilowatt of solar panels

kWh 39 Jan 54 Feb 89 Mar 115 Apr 123 May 119 Jun 121 Jul 111 Aug 96 Sep 69 Oct 46 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.9% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 42 kWh per month; the average month produces around 85 kWh. So a typical 4 kW home system would generate roughly 169 kWh in winter, or 339 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.10p/kWh
Daily Fixed Charge
53.60p/day
Local Sunshine
1016kWh/kW
A 1 kW system generates ~1016 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: 65% • Flats: 17% • Bungalows: 17% Based on 14,783 properties

Coverage

Boston (100%)

Areas Covered

Skirbeck, Trinity, Fishtoft, Witham, Wyberton, Station, St Thomas', Fenside + 4 more

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 East Midlands

PE20 (Boston)
≈6.7 km away
Local sunshine: ~1,019 kWh/kWp · +0% vs PE21
PE22 (East Lindsey)
≈8.8 km away
Local sunshine: ~1,010 kWh/kWp · -1% vs PE21
PE12 (South Holland)
≈19.9 km away
Local sunshine: ~1,020 kWh/kWp · +0% vs PE21
PE11 (South Holland)
≈22.0 km away
Local sunshine: ~1,009 kWh/kWp · -1% vs PE21
PE23 (East Lindsey)
≈23.5 km away
Local sunshine: ~1,006 kWh/kWp · -1% vs PE21
LN10 (East Lindsey)
≈23.5 km away
Local sunshine: ~980 kWh/kWp · -4% vs PE21

Similar sunshine across the UK

SO22 (Winchester)
~1,016 kWh/kWp · -0% vs PE21
ME2 (Medway)
~1,016 kWh/kWp · +0% vs PE21
TQ1 (Torbay)
~1,016 kWh/kWp · +0% vs PE21