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Solar Panels in CM92 (Harlow)

See if solar pays off for you in Harlow — 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
£836
What you save every year
Profit Over 25 Years
£10,723
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: £836, 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 2013 kWh 805 kWh 1208 kWh £214 £121 £334 £4,069 12.2 yrs £2,618
3 kW 3019 kWh 1208 kWh 1811 kWh £320 £181 £501 £6,104 12.2 yrs £3,926
4 kW 4025 kWh 1610 kWh 2415 kWh £427 £242 £669 £8,138 12.2 yrs £5,235
5 kW 5032 kWh 2013 kWh 3019 kWh £534 £302 £836 £10,173 12.2 yrs £6,544
6 kW 6038 kWh 2415 kWh 3623 kWh £641 £362 £1,003 £12,207 12.2 yrs £7,853
7 kW 7044 kWh 2818 kWh 4226 kWh £748 £423 £1,170 £14,242 12.2 yrs £9,162
8 kW 8050 kWh 3220 kWh 4830 kWh £854 £483 £1,337 £16,276 12.2 yrs £10,471

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: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2013 kWh 1208 kWh 805 kWh £320 £81 £401 £6,169 15.4 yrs £1,848
3 kW 3019 kWh 1811 kWh 1208 kWh £481 £121 £601 £8,204 13.6 yrs £3,823
4 kW 4025 kWh 2415 kWh 1610 kWh £641 £161 £802 £10,238 12.8 yrs £5,797
5 kW 5032 kWh 3019 kWh 2013 kWh £801 £201 £1,002 £12,273 12.2 yrs £7,771
6 kW 6038 kWh 3623 kWh 2415 kWh £961 £242 £1,203 £14,307 11.9 yrs £9,745
7 kW 7044 kWh 4226 kWh 2818 kWh £1,121 £282 £1,403 £16,342 11.6 yrs £11,719
8 kW 8050 kWh 4830 kWh 3220 kWh £1,281 £322 £1,603 £18,376 11.5 yrs £13,693

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 2013 kWh 1409 kWh 604 kWh £374 £60 £434 £7,569 17.4 yrs £1,114
3 kW 3019 kWh 2113 kWh 906 kWh £561 £91 £651 £9,604 14.7 yrs £3,421
4 kW 4025 kWh 2818 kWh 1208 kWh £748 £121 £868 £11,638 13.4 yrs £5,727
5 kW 5032 kWh 3522 kWh 1509 kWh £934 £151 £1,085 £13,673 12.6 yrs £8,034
6 kW 6038 kWh 4226 kWh 1811 kWh £1,121 £181 £1,302 £15,707 12.1 yrs £10,341
7 kW 7044 kWh 4931 kWh 2113 kWh £1,308 £211 £1,519 £17,742 11.7 yrs £12,648
8 kW 8050 kWh 5635 kWh 2415 kWh £1,495 £242 £1,737 £19,776 11.4 yrs £14,955

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 2013 kWh 1469 kWh 543 kWh £390 £54 £444 £9,319 21.0 yrs £-437
3 kW 3019 kWh 2204 kWh 815 kWh £585 £82 £666 £11,354 17.0 yrs £1,970
4 kW 4025 kWh 2938 kWh 1087 kWh £780 £109 £888 £13,388 15.1 yrs £4,377
5 kW 5032 kWh 3673 kWh 1359 kWh £974 £136 £1,110 £15,423 13.9 yrs £6,783
6 kW 6038 kWh 4408 kWh 1630 kWh £1,169 £163 £1,332 £17,457 13.1 yrs £9,190
7 kW 7044 kWh 5142 kWh 1902 kWh £1,364 £190 £1,554 £19,492 12.5 yrs £11,597
8 kW 8050 kWh 5877 kWh 2174 kWh £1,559 £217 £1,776 £21,526 12.1 yrs £14,003

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: £1,127, 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 2013 kWh 1509 kWh 503 kWh £400 £50 £451 £11,069 24.6 yrs £-2,054
3 kW 3019 kWh 2264 kWh 755 kWh £601 £75 £676 £13,104 19.4 yrs £420
4 kW 4025 kWh 3019 kWh 1006 kWh £801 £101 £902 £15,138 16.8 yrs £2,893
5 kW 5032 kWh 3774 kWh 1258 kWh £1,001 £126 £1,127 £17,173 15.2 yrs £5,366
6 kW 6038 kWh 4528 kWh 1509 kWh £1,201 £151 £1,352 £19,207 14.2 yrs £7,839
7 kW 7044 kWh 5283 kWh 1761 kWh £1,402 £176 £1,578 £21,242 13.5 yrs £10,312
8 kW 8050 kWh 6038 kWh 2013 kWh £1,602 £201 £1,803 £23,276 12.9 yrs £12,786

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: £1,144, 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 2013 kWh 1550 kWh 463 kWh £411 £46 £457 £13,519 29.6 yrs £-4,371
3 kW 3019 kWh 2325 kWh 694 kWh £617 £69 £686 £15,554 22.7 yrs £-1,831
4 kW 4025 kWh 3099 kWh 926 kWh £822 £93 £915 £17,588 19.2 yrs £709
5 kW 5032 kWh 3874 kWh 1157 kWh £1,028 £116 £1,144 £19,623 17.2 yrs £3,249
6 kW 6038 kWh 4649 kWh 1389 kWh £1,233 £139 £1,372 £21,657 15.8 yrs £5,788
7 kW 7044 kWh 5424 kWh 1620 kWh £1,439 £162 £1,601 £23,692 14.8 yrs £8,328
8 kW 8050 kWh 6199 kWh 1852 kWh £1,645 £185 £1,830 £25,726 14.1 yrs £10,868

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 CM92

Figures below are tailored to CM92 — click through for full league tables.

Solar Payback Index Rank #619 of 2997
10.6 years (UK avg 11.3 years)
~£961 /yr • £10,173 upfront
Standing-Charge Drag Rank #1101 of 2997
18.3% (UK avg 21.7%) drag on savings
£176 fixed • ~£961 /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

No EPC data available for this outcode

Coverage

Harlow (100%)

Areas Covered

Great Parndon

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

CM19 (Harlow)
≈1.4 km away
Local sunshine: ~1,006 kWh/kWp · -0% vs CM92
CM20 (Harlow)
≈2.3 km away
Local sunshine: ~1,006 kWh/kWp · -0% vs CM92
CM18 (Harlow)
≈3.3 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs CM92
EN11 (Broxbourne)
≈5.0 km away
Local sunshine: ~994 kWh/kWp · -1% vs CM92
CM17 (Harlow)
≈5.3 km away
Local sunshine: ~1,012 kWh/kWp · +1% vs CM92
EN10 (Broxbourne)
≈6.5 km away
Local sunshine: ~990 kWh/kWp · -2% vs CM92

Similar sunshine across the UK

BS21 (North Somerset)
~1,006 kWh/kWp · -0% vs CM92
RH12 (Horsham)
~1,006 kWh/kWp · +0% vs CM92
CF11 (Cardiff)
~1,006 kWh/kWp · -0% vs CM92