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Solar panel cost in Colchester (CO1)

See realistic solar installation costs, savings and payback for CO1 (Colchester) 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
10.4 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£703
What you save every year
Profit Over 25 Years
£10,277
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 Eastern, the current unit rate is 26.38p/kWh with a 53.94p/day standing charge. Your postcode’s south-facing sunshine yield is 1062 kWh/kW — 53 above the regional median (1009).

Read the full story

A typical roof here lands around 4.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1062 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
53.9p/day
Sunshine yield (south)
1062 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: £879, Upfront: £9,134, Break-even: 10.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2125 kWh 850 kWh 1275 kWh £224 £127 £352 £3,654 10.4 yrs £3,380
3 kW 3187 kWh 1275 kWh 1912 kWh £336 £191 £528 £5,481 10.4 yrs £5,070
4 kW 4250 kWh 1700 kWh 2550 kWh £448 £255 £703 £7,307 10.4 yrs £6,760
5 kW 5312 kWh 2125 kWh 3187 kWh £561 £319 £879 £9,134 10.4 yrs £8,450
6 kW 6374 kWh 2550 kWh 3825 kWh £673 £382 £1,055 £10,961 10.4 yrs £10,140
7 kW 7437 kWh 2975 kWh 4462 kWh £785 £446 £1,231 £12,788 10.4 yrs £11,830
8 kW 8499 kWh 3400 kWh 5099 kWh £897 £510 £1,407 £14,615 10.4 yrs £13,521

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £1,053, Upfront: £11,234, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2125 kWh 1275 kWh 850 kWh £336 £85 £421 £5,754 13.7 yrs £2,672
3 kW 3187 kWh 1912 kWh 1275 kWh £504 £127 £632 £7,581 12.0 yrs £5,058
4 kW 4250 kWh 2550 kWh 1700 kWh £673 £170 £843 £9,407 11.2 yrs £7,445
5 kW 5312 kWh 3187 kWh 2125 kWh £841 £212 £1,053 £11,234 10.7 yrs £9,831
6 kW 6374 kWh 3825 kWh 2550 kWh £1,009 £255 £1,264 £13,061 10.3 yrs £12,217
7 kW 7437 kWh 4462 kWh 2975 kWh £1,177 £297 £1,475 £14,888 10.1 yrs £14,603
8 kW 8499 kWh 5099 kWh 3400 kWh £1,345 £340 £1,685 £16,715 9.9 yrs £16,989

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,140, Upfront: £12,634, 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 2125 kWh 1487 kWh 637 kWh £392 £64 £456 £7,154 15.7 yrs £1,968
3 kW 3187 kWh 2231 kWh 956 kWh £589 £96 £684 £8,981 13.1 yrs £4,703
4 kW 4250 kWh 2975 kWh 1275 kWh £785 £127 £912 £10,807 11.8 yrs £7,437
5 kW 5312 kWh 3718 kWh 1594 kWh £981 £159 £1,140 £12,634 11.1 yrs £10,171
6 kW 6374 kWh 4462 kWh 1912 kWh £1,177 £191 £1,368 £14,461 10.6 yrs £12,905
7 kW 7437 kWh 5206 kWh 2231 kWh £1,373 £223 £1,596 £16,288 10.2 yrs £15,639
8 kW 8499 kWh 5949 kWh 2550 kWh £1,569 £255 £1,824 £18,115 9.9 yrs £18,373

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,166, Upfront: £14,384, 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 2125 kWh 1551 kWh 574 kWh £409 £57 £467 £8,904 19.1 yrs £427
3 kW 3187 kWh 2327 kWh 861 kWh £614 £86 £700 £10,731 15.3 yrs £3,266
4 kW 4250 kWh 3102 kWh 1147 kWh £818 £115 £933 £12,557 13.5 yrs £6,104
5 kW 5312 kWh 3878 kWh 1434 kWh £1,023 £143 £1,166 £14,384 12.3 yrs £8,943
6 kW 6374 kWh 4653 kWh 1721 kWh £1,228 £172 £1,400 £16,211 11.6 yrs £11,781
7 kW 7437 kWh 5429 kWh 2008 kWh £1,432 £201 £1,633 £18,038 11.0 yrs £14,620
8 kW 8499 kWh 6204 kWh 2295 kWh £1,637 £229 £1,866 £19,865 10.6 yrs £17,459

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,184, Upfront: £16,134, Break-even: 13.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2125 kWh 1594 kWh 531 kWh £420 £53 £474 £10,654 22.5 yrs £-1,184
3 kW 3187 kWh 2390 kWh 797 kWh £631 £80 £710 £12,481 17.6 yrs £1,725
4 kW 4250 kWh 3187 kWh 1062 kWh £841 £106 £947 £14,307 15.1 yrs £4,633
5 kW 5312 kWh 3984 kWh 1328 kWh £1,051 £133 £1,184 £16,134 13.6 yrs £7,541
6 kW 6374 kWh 4781 kWh 1594 kWh £1,261 £159 £1,421 £17,961 12.6 yrs £10,449
7 kW 7437 kWh 5577 kWh 1859 kWh £1,471 £186 £1,657 £19,788 11.9 yrs £13,357
8 kW 8499 kWh 6374 kWh 2125 kWh £1,682 £212 £1,894 £21,615 11.4 yrs £16,266

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,201, Upfront: £18,584, Break-even: 15.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2125 kWh 1636 kWh 489 kWh £432 £49 £480 £13,104 27.3 yrs £-3,494
3 kW 3187 kWh 2454 kWh 733 kWh £647 £73 £721 £14,931 20.7 yrs £-517
4 kW 4250 kWh 3272 kWh 977 kWh £863 £98 £961 £16,757 17.4 yrs £2,461
5 kW 5312 kWh 4090 kWh 1222 kWh £1,079 £122 £1,201 £18,584 15.5 yrs £5,439
6 kW 6374 kWh 4908 kWh 1466 kWh £1,295 £147 £1,441 £20,411 14.2 yrs £8,417
7 kW 7437 kWh 5726 kWh 1710 kWh £1,511 £171 £1,682 £22,238 13.2 yrs £11,395
8 kW 8499 kWh 6544 kWh 1955 kWh £1,726 £195 £1,922 £24,065 12.5 yrs £14,372

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, 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 Colchester

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.

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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 CO1

Figures below are tailored to CO1 — click through for full league tables.

Big-Roof Britain Rank #2171 of 2182
3.5 kWp (UK avg 5.1 kWp)
~7 panels (≈430 W)
Solar Payback Index Rank #1440 of 2996
10.4 years (UK avg 10.8 years)
~£703 /yr • £7,307 upfront
Standing-Charge Drag Rank #1861 of 2996
28.0% (UK avg 26.6%) drag on savings
£197 fixed • ~£703 /yr value
Aspect Penalty View ranking →
East −22.2% West −21.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in CO1

Monthly generation per kilowatt of solar panels

kWh 41 Jan 56 Feb 89 Mar 121 Apr 127 May 129 Jun 128 Jul 115 Aug 99 Sep 71 Oct 50 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.2% of an average month (Dec–Feb)

Best / worst month: Jun / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 44 kWh per month; the average month produces around 89 kWh. So a typical 4 kW home system would generate roughly 178 kWh in winter, or 354 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.38p/kWh
Daily Fixed Charge
53.94p/day
Local Sunshine
1062kWh/kW
A 1 kW system generates ~1062 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
4.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 47% • Flats: 47% • Bungalows: 2% Based on 6,754 properties

Coverage

Colchester (100%)

Areas Covered

Castle, Tiptree, New Town and Christ Church, Old Heath and The Hythe, Greenstead, Mile End, Shrub End, Ardleigh & Little Bromley + 2 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 Eastern

CO2 (Colchester)
≈1.9 km away
Local sunshine: ~1,062 kWh/kWp · -0% vs CO1
CO4 (Colchester)
≈2.0 km away
Local sunshine: ~1,062 kWh/kWp · -0% vs CO1
CO3 (Colchester)
≈3.8 km away
Local sunshine: ~1,047 kWh/kWp · -1% vs CO1
CO7 (Tendring)
≈7.1 km away
Local sunshine: ~1,094 kWh/kWp · +3% vs CO1
CO6 (Colchester)
≈8.4 km away
Local sunshine: ~1,039 kWh/kWp · -2% vs CO1
CO11 (Tendring)
≈12.3 km away
Local sunshine: ~1,070 kWh/kWp · +1% vs CO1

Similar sunshine across the UK

PO32 (Isle of Wight)
~1,062 kWh/kWp · -0% vs CO1
TQ6 (South Hams)
~1,062 kWh/kWp · -0% vs CO1
SO19 (Southampton)
~1,063 kWh/kWp · +0% vs CO1