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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CM0 (Maldon)

See if solar pays off for you in Maldon — 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
11.1 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£913
What you save every year
Profit Over 25 Years
£12,647
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 1099 kWh/kW — 90 above 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 1099 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)
1099 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: £913, Upfront: £10,173, 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 2198 kWh 879 kWh 1319 kWh £233 £132 £365 £4,069 11.1 yrs £3,233
3 kW 3297 kWh 1319 kWh 1978 kWh £350 £198 £548 £6,104 11.1 yrs £4,850
4 kW 4396 kWh 1758 kWh 2637 kWh £466 £264 £730 £8,138 11.1 yrs £6,466
5 kW 5495 kWh 2198 kWh 3297 kWh £583 £330 £913 £10,173 11.1 yrs £8,083
6 kW 6594 kWh 2637 kWh 3956 kWh £700 £396 £1,095 £12,207 11.1 yrs £9,699
7 kW 7693 kWh 3077 kWh 4616 kWh £816 £462 £1,278 £14,242 11.1 yrs £11,316
8 kW 8791 kWh 3517 kWh 5275 kWh £933 £527 £1,460 £16,276 11.1 yrs £12,933

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: £1,094, Upfront: £12,273, Break-even: 11.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2198 kWh 1319 kWh 879 kWh £350 £88 £438 £6,169 14.1 yrs £2,586
3 kW 3297 kWh 1978 kWh 1319 kWh £525 £132 £657 £8,204 12.5 yrs £4,930
4 kW 4396 kWh 2637 kWh 1758 kWh £700 £176 £876 £10,238 11.7 yrs £7,273
5 kW 5495 kWh 3297 kWh 2198 kWh £875 £220 £1,094 £12,273 11.2 yrs £9,616
6 kW 6594 kWh 3956 kWh 2637 kWh £1,050 £264 £1,313 £14,307 10.9 yrs £11,959
7 kW 7693 kWh 4616 kWh 3077 kWh £1,224 £308 £1,532 £16,342 10.7 yrs £14,302
8 kW 8791 kWh 5275 kWh 3517 kWh £1,399 £352 £1,751 £18,376 10.5 yrs £16,646

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: £1,185, Upfront: £13,673, Break-even: 11.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2198 kWh 1539 kWh 659 kWh £408 £66 £474 £7,569 16.0 yrs £1,913
3 kW 3297 kWh 2308 kWh 989 kWh £612 £99 £711 £9,604 13.5 yrs £4,619
4 kW 4396 kWh 3077 kWh 1319 kWh £816 £132 £948 £11,638 12.3 yrs £7,326
5 kW 5495 kWh 3846 kWh 1648 kWh £1,020 £165 £1,185 £13,673 11.5 yrs £10,032
6 kW 6594 kWh 4616 kWh 1978 kWh £1,224 £198 £1,422 £15,707 11.0 yrs £12,739
7 kW 7693 kWh 5385 kWh 2308 kWh £1,429 £231 £1,659 £17,742 10.7 yrs £15,445
8 kW 8791 kWh 6154 kWh 2637 kWh £1,633 £264 £1,896 £19,776 10.4 yrs £18,152

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: £1,212, Upfront: £15,423, Break-even: 12.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2198 kWh 1604 kWh 593 kWh £426 £59 £485 £9,319 19.2 yrs £381
3 kW 3297 kWh 2407 kWh 890 kWh £638 £89 £727 £11,354 15.6 yrs £3,196
4 kW 4396 kWh 3209 kWh 1187 kWh £851 £119 £970 £13,388 13.8 yrs £6,012
5 kW 5495 kWh 4011 kWh 1484 kWh £1,064 £148 £1,212 £15,423 12.7 yrs £8,827
6 kW 6594 kWh 4813 kWh 1780 kWh £1,277 £178 £1,455 £17,457 12.0 yrs £11,643
7 kW 7693 kWh 5616 kWh 2077 kWh £1,490 £208 £1,697 £19,492 11.5 yrs £14,458
8 kW 8791 kWh 6418 kWh 2374 kWh £1,703 £237 £1,940 £21,526 11.1 yrs £17,274

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: £1,231, Upfront: £17,173, 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 2198 kWh 1648 kWh 549 kWh £437 £55 £492 £11,069 22.5 yrs £-1,224
3 kW 3297 kWh 2473 kWh 824 kWh £656 £82 £738 £13,104 17.7 yrs £1,664
4 kW 4396 kWh 3297 kWh 1099 kWh £875 £110 £985 £15,138 15.4 yrs £4,553
5 kW 5495 kWh 4121 kWh 1374 kWh £1,093 £137 £1,231 £17,173 14.0 yrs £7,441
6 kW 6594 kWh 4945 kWh 1648 kWh £1,312 £165 £1,477 £19,207 13.0 yrs £10,329
7 kW 7693 kWh 5769 kWh 1923 kWh £1,531 £192 £1,723 £21,242 12.3 yrs £13,217
8 kW 8791 kWh 6594 kWh 2198 kWh £1,749 £220 £1,969 £23,276 11.8 yrs £16,105

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: £1,249, Upfront: £19,623, Break-even: 15.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2198 kWh 1692 kWh 506 kWh £449 £51 £500 £13,519 27.1 yrs £-3,528
3 kW 3297 kWh 2539 kWh 758 kWh £673 £76 £749 £15,554 20.8 yrs £-568
4 kW 4396 kWh 3385 kWh 1011 kWh £898 £101 £999 £17,588 17.6 yrs £2,393
5 kW 5495 kWh 4231 kWh 1264 kWh £1,122 £126 £1,249 £19,623 15.7 yrs £5,354
6 kW 6594 kWh 5077 kWh 1517 kWh £1,347 £152 £1,499 £21,657 14.5 yrs £8,315
7 kW 7693 kWh 5923 kWh 1769 kWh £1,571 £177 £1,748 £23,692 13.6 yrs £11,276
8 kW 8791 kWh 6769 kWh 2022 kWh £1,796 £202 £1,998 £25,726 12.9 yrs £14,236

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 CM0

Figures below are tailored to CM0 — click through for full league tables.

Big-Roof Britain Rank #757 of 2182
5.3 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #83 of 2997
9.7 years (UK avg 11.3 years)
~£1,049 /yr • £10,173 upfront
Standing-Charge Drag Rank #682 of 2997
16.8% (UK avg 21.7%) drag on savings
£176 fixed • ~£1,049 /yr value

Your Area at a Glance

Your Electricity Rate
26.53p/kWh
Daily Fixed Charge
48.25p/day
Local Sunshine
1099kWh/kW
A 1 kW system generates ~1099 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: 68% • Flats: 12% • Bungalows: 19% Based on 5,100 properties

Coverage

Maldon (100%)

Areas Covered

Southminster, Burnham-on-Crouch South, Burnham-on-Crouch North, Tillingham, Mayland

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

SS4 (Rochford)
≈10.9 km away
Local sunshine: ~1,068 kWh/kWp · -3% vs CM0
SS5 (Rochford)
≈12.8 km away
Local sunshine: ~1,083 kWh/kWp · -1% vs CM0
CM9 (Maldon)
≈13.0 km away
Local sunshine: ~1,054 kWh/kWp · -4% vs CM0
SS3 (Southend-on-Sea)
≈13.1 km away
Local sunshine: ~1,066 kWh/kWp · -3% vs CM0
SS22 (Southend-on-Sea)
≈13.5 km away
Local sunshine: ~1,068 kWh/kWp · -3% vs CM0
SS2 (Southend-on-Sea)
≈14.2 km away
Local sunshine: ~1,055 kWh/kWp · -4% vs CM0

Similar sunshine across the UK

TR22 (Isles of Scilly)
~1,099 kWh/kWp · -0% vs CM0
CT13 (Dover)
~1,100 kWh/kWp · +0% vs CM0
TR12 (Cornwall)
~1,097 kWh/kWp · -0% vs CM0