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Solar panel cost in Dartford (DA10)

See realistic solar installation costs, savings and payback for DA10 (Dartford) 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
9.5 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£856
What you save every year
Profit Over 25 Years
£13,267
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 South East, the current unit rate is 26.67p/kWh with a 54.45p/day standing charge. Your postcode’s south-facing sunshine yield is 1027 kWh/kW — 2 below the regional median (1029).

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 1027 kWh per year on a south-facing roof. We value self-used electricity at 26.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.7p/kWh
Standing charge
54.5p/day
Sunshine yield (south)
1027 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: £856, Upfront: £8,139, Break-even: 9.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2055 kWh 822 kWh 1233 kWh £219 £123 £342 £3,256 9.5 yrs £3,594
3 kW 3082 kWh 1233 kWh 1849 kWh £329 £185 £514 £4,883 9.5 yrs £5,391
4 kW 4110 kWh 1644 kWh 2466 kWh £438 £247 £685 £6,511 9.5 yrs £7,188
5 kW 5137 kWh 2055 kWh 3082 kWh £548 £308 £856 £8,139 9.5 yrs £8,986
6 kW 6164 kWh 2466 kWh 3699 kWh £658 £370 £1,027 £9,767 9.5 yrs £10,783
7 kW 7192 kWh 2877 kWh 4315 kWh £767 £431 £1,199 £11,394 9.5 yrs £12,580
8 kW 8219 kWh 3288 kWh 4931 kWh £877 £493 £1,370 £13,022 9.5 yrs £14,377

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: £1,027, Upfront: £10,239, 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 2055 kWh 1233 kWh 822 kWh £329 £82 £411 £5,356 13.0 yrs £2,864
3 kW 3082 kWh 1849 kWh 1233 kWh £493 £123 £616 £6,983 11.3 yrs £5,347
4 kW 4110 kWh 2466 kWh 1644 kWh £658 £164 £822 £8,611 10.5 yrs £7,829
5 kW 5137 kWh 3082 kWh 2055 kWh £822 £205 £1,027 £10,239 10.0 yrs £10,311
6 kW 6164 kWh 3699 kWh 2466 kWh £986 £247 £1,233 £11,867 9.6 yrs £12,793
7 kW 7192 kWh 4315 kWh 2877 kWh £1,151 £288 £1,438 £13,494 9.4 yrs £15,275
8 kW 8219 kWh 4931 kWh 3288 kWh £1,315 £329 £1,644 £15,122 9.2 yrs £17,757

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: £1,113, Upfront: £11,639, Break-even: 10.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2055 kWh 1438 kWh 616 kWh £384 £62 £445 £6,756 15.2 yrs £2,149
3 kW 3082 kWh 2157 kWh 925 kWh £575 £92 £668 £8,383 12.6 yrs £4,974
4 kW 4110 kWh 2877 kWh 1233 kWh £767 £123 £890 £10,011 11.2 yrs £7,799
5 kW 5137 kWh 3596 kWh 1541 kWh £959 £154 £1,113 £11,639 10.5 yrs £10,623
6 kW 6164 kWh 4315 kWh 1849 kWh £1,151 £185 £1,336 £13,267 9.9 yrs £13,448
7 kW 7192 kWh 5034 kWh 2157 kWh £1,343 £216 £1,558 £14,894 9.6 yrs £16,273
8 kW 8219 kWh 5753 kWh 2466 kWh £1,534 £247 £1,781 £16,522 9.3 yrs £19,098

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: £1,139, Upfront: £13,389, 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 2055 kWh 1500 kWh 555 kWh £400 £55 £456 £8,506 18.7 yrs £605
3 kW 3082 kWh 2250 kWh 832 kWh £600 £83 £683 £10,133 14.8 yrs £3,532
4 kW 4110 kWh 3000 kWh 1110 kWh £800 £111 £911 £11,761 12.9 yrs £6,460
5 kW 5137 kWh 3750 kWh 1387 kWh £1,000 £139 £1,139 £13,389 11.8 yrs £9,387
6 kW 6164 kWh 4500 kWh 1664 kWh £1,200 £166 £1,367 £15,017 11.0 yrs £12,315
7 kW 7192 kWh 5250 kWh 1942 kWh £1,400 £194 £1,594 £16,644 10.4 yrs £15,242
8 kW 8219 kWh 6000 kWh 2219 kWh £1,600 £222 £1,822 £18,272 10.0 yrs £18,170

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: £1,156, Upfront: £15,139, Break-even: 13.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2055 kWh 1541 kWh 514 kWh £411 £51 £462 £10,256 22.2 yrs £-1,008
3 kW 3082 kWh 2312 kWh 771 kWh £617 £77 £694 £11,883 17.1 yrs £1,988
4 kW 4110 kWh 3082 kWh 1027 kWh £822 £103 £925 £13,511 14.6 yrs £4,984
5 kW 5137 kWh 3853 kWh 1284 kWh £1,028 £128 £1,156 £15,139 13.1 yrs £7,980
6 kW 6164 kWh 4623 kWh 1541 kWh £1,233 £154 £1,387 £16,767 12.1 yrs £10,976
7 kW 7192 kWh 5394 kWh 1798 kWh £1,439 £180 £1,618 £18,394 11.4 yrs £13,972
8 kW 8219 kWh 6164 kWh 2055 kWh £1,644 £205 £1,849 £20,022 10.8 yrs £16,968

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: £1,173, Upfront: £17,589, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2055 kWh 1582 kWh 473 kWh £422 £47 £469 £12,706 27.1 yrs £-3,321
3 kW 3082 kWh 2373 kWh 709 kWh £633 £71 £704 £14,333 20.4 yrs £-257
4 kW 4110 kWh 3164 kWh 945 kWh £844 £95 £938 £15,961 17.0 yrs £2,808
5 kW 5137 kWh 3955 kWh 1181 kWh £1,055 £118 £1,173 £17,589 15.0 yrs £5,872
6 kW 6164 kWh 4746 kWh 1418 kWh £1,266 £142 £1,408 £19,217 13.7 yrs £8,937
7 kW 7192 kWh 5538 kWh 1654 kWh £1,477 £165 £1,642 £20,844 12.7 yrs £12,001
8 kW 8219 kWh 6329 kWh 1890 kWh £1,688 £189 £1,877 £22,472 12.0 yrs £15,066

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 Dartford

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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Understand DNO, G98 and G99 export limits

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Insights for DA10

Figures below are tailored to DA10 — click through for full league tables.

Big-Roof Britain Rank #1659 of 2182
4.5 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #279 of 2996
9.5 years (UK avg 10.8 years)
~£856 /yr • £8,139 upfront
Standing-Charge Drag Rank #1033 of 2996
23.2% (UK avg 26.6%) drag on savings
£199 fixed • ~£856 /yr value
Aspect Penalty View ranking →
East −21.2% West −20.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DA10

Monthly generation per kilowatt of solar panels

kWh 39 Jan 52 Feb 85 Mar 114 Apr 122 May 124 Jun 126 Jul 114 Aug 97 Sep 70 Oct 48 Nov 36 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.2% of an average month (Dec–Feb)

Best / worst month: Jul / 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 86 kWh. So a typical 4 kW home system would generate roughly 169 kWh in winter, or 342 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1027kWh/kW
A 1 kW system generates ~1027 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: 63% • Flats: 35% • Bungalows: 1% Based on 5,225 properties

Coverage

Dartford (100%)

Areas Covered

Swanscombe, Ebbsfleet, West Hill, Greenhithe & Knockhall

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 South East

DA9 (Dartford)
≈1.9 km away
Local sunshine: ~1,025 kWh/kWp · -0% vs DA10
DA11 (Gravesham)
≈3.3 km away
Local sunshine: ~1,028 kWh/kWp · +0% vs DA10
DA2 (Dartford)
≈4.6 km away
Local sunshine: ~1,024 kWh/kWp · -0% vs DA10
DA12 (Gravesham)
≈5.0 km away
Local sunshine: ~1,028 kWh/kWp · +0% vs DA10
DA3 (Sevenoaks)
≈6.0 km away
Local sunshine: ~1,025 kWh/kWp · -0% vs DA10
DA4 (Sevenoaks)
≈7.4 km away
Local sunshine: ~1,015 kWh/kWp · -1% vs DA10

Similar sunshine across the UK

RM14 (Havering)
~1,027 kWh/kWp · +0% vs DA10
NR33 (East Suffolk)
~1,027 kWh/kWp · -0% vs DA10
BS24 (North Somerset)
~1,027 kWh/kWp · -0% vs DA10