SolarSolar Panels in CF45 Mountain Ash
Cardiff • Wales • 1351 sun hours/year
Homes in CF45 save an average of
with solar panels • 8.8-year payback
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Solar Panel Potential in Mountain Ash (CF45)
Postcode district CF45 receives approximately 1351 hours of sunshine per year, making it a viable location for solar panels in the UK. A typical 4kW system here generates around 3,783 kWh of electricity annually.
Of this, roughly half (1,892 kWh) is used directly in your home, saving you £445 on electricity bills at the current rate of 23.5p/kWh. The remaining 1,891 kWh is exported to the grid under the Smart Export Guarantee, earning you an additional £227 per year at 12p/kWh.
Solar Panel Costs in CF45
The average cost of a 4kW solar panel system in the Wales region is approximately £5,900. This includes panels, inverter, mounting, and installation by an MCS-certified installer. Prices have fallen over 60% in the last decade, and 0% VAT currently applies.
At £672 annual savings, the system pays for itself in 8.8 years, then generates profit for a further 16 years — a total 25-year return of £9,915.
Year-by-Year Savings Breakdown
Payback Timeline
| Year | Generation (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| 1 | 3,783 | £672 | £-5,228 |
| 2 | 3,764 | £668 | £-4,560 |
| 3 | 3,745 | £665 | £-3,895 |
| 4 | 3,727 | £662 | £-3,233 |
| 5 | 3,708 | £658 | £-2,575 |
| 6 | 3,689 | £655 | £-1,920 |
| 7 | 3,671 | £651 | £-1,269 |
| 8 | 3,653 | £648 | £-621 |
| 9 | 3,634 | £645 | +£24 |
| 10 | 3,616 | £642 | +£666 |
| 11 | 3,598 | £639 | +£1,305 |
| 12 | 3,580 | £636 | +£1,941 |
| 13 | 3,562 | £633 | +£2,574 |
| 14 | 3,544 | £629 | +£3,203 |
| 15 | 3,527 | £626 | +£3,829 |
| 16 | 3,509 | £623 | +£4,452 |
| 17 | 3,491 | £619 | +£5,071 |
| 18 | 3,474 | £616 | +£5,687 |
| 19 | 3,457 | £613 | +£6,300 |
| 20 | 3,439 | £610 | +£6,910 |
| 21 | 3,422 | £607 | +£7,517 |
| 22 | 3,405 | £604 | +£8,121 |
| 23 | 3,388 | £601 | +£8,722 |
| 24 | 3,371 | £598 | +£9,320 |
| 25 | 3,354 | £595 | +£9,915 |
How CF45 Compares to the UK Average
Nearby Areas Compared
| Area | Sun Hours | Annual Savings | Payback |
|---|---|---|---|
| CF45 Mountain Ash | 1351hrs | £672/yr | 8.8 yrs |
| CF44 Aberdare | 1350hrs | £671/yr | 8.8 yrs |
| CF46 Treharris | 1352hrs | £672/yr | 8.8 yrs |
| CF47 Merthyr Tydfil | 1353hrs | £672/yr | 8.8 yrs |
Battery Storage in CF45
With 3,783 kWh of annual generation, adding a battery could increase your self-consumption from 50% to 80%, boosting annual savings significantly.
Is battery storage worth it in CF45? →Get 3 Free Solar Quotes in Mountain Ash
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How We Calculated These Figures
Our estimates are based on 1351 annual sun hours for the Wales region, a standard 4kW system with south-facing orientation, and 50% self-consumption ratio. Electricity savings use the current average tariff of 23.5p/kWh, and export income uses the Smart Export Guarantee average of 12p/kWh. Panel degradation of 0.5% per year is factored into 25-year projections.
Actual savings will vary based on your roof orientation, shading, energy usage patterns, chosen system size, and installer pricing. We recommend getting at least 3 quotes from MCS-certified installers for accurate pricing.
Nearby Areas
Frequently Asked Questions
How much can I save with solar panels in CF45?
Homes in CF45 Mountain Ash save an average of £672 per year with a typical 4kW solar panel system. This is based on 1351 annual sun hours, generating 3,783 kWh of electricity. Over 25 years, the total profit after system costs is £9,915.
What is the payback period for solar panels in CF45?
The average payback period for a 4kW solar panel system in CF45 is 8.8 years. After that, you enjoy 16 or more years of pure profit from reduced electricity bills and Smart Export Guarantee payments.
How many solar panels do I need for a home in CF45?
A typical 4kW system uses 10-12 solar panels (depending on panel wattage, typically 350-400W each). This suits most 3-4 bedroom homes. For exact sizing, get a quote from an MCS-certified installer who will assess your roof space and orientation.
Is solar worth it in CF45 Mountain Ash?
Yes. With 1351 sun hours per year (£12 below the UK average savings), CF45 is a viable location for solar. A 4kW system costs approximately £5,900 and pays for itself in 8.8 years, then generates profit for 15+ more years.
What grants are available for solar panels in CF45?
Solar panels in the UK currently benefit from 0% VAT (until at least 2027), reducing upfront costs. You may also be eligible for the ECO4 scheme if you receive certain benefits. The Smart Export Guarantee pays you for electricity you export to the grid — the average rate in your area is 12p/kWh.
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