SolarSolar Panels in SN25 Swindon
Wiltshire • South West • 1438 sun hours/year
Homes in SN25 save an average of
with solar panels • 8.9-year payback
Get 3 Free Solar Quotes in Swindon
Compare prices from MCS-certified installers near you. No obligation, completely free.
Solar Panel Potential in Swindon (SN25)
Postcode district SN25 receives approximately 1438 hours of sunshine per year, making it an above-average location for solar panels in the UK. A typical 4kW system here generates around 4,026 kWh of electricity annually.
Of this, roughly half (2,013 kWh) is used directly in your home, saving you £491 on electricity bills at the current rate of 24.4p/kWh. The remaining 2,013 kWh is exported to the grid under the Smart Export Guarantee, earning you an additional £242 per year at 12p/kWh.
Solar Panel Costs in SN25
The average cost of a 4kW solar panel system in the South West region is approximately £6,500. 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 £733 annual savings, the system pays for itself in 8.9 years, then generates profit for a further 16 years — a total 25-year return of £10,760.
Year-by-Year Savings Breakdown
Payback Timeline
| Year | Generation (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| 1 | 4,026 | £733 | £-5,767 |
| 2 | 4,006 | £729 | £-5,038 |
| 3 | 3,986 | £725 | £-4,313 |
| 4 | 3,966 | £722 | £-3,591 |
| 5 | 3,946 | £718 | £-2,873 |
| 6 | 3,926 | £715 | £-2,158 |
| 7 | 3,907 | £711 | £-1,447 |
| 8 | 3,887 | £707 | £-740 |
| 9 | 3,868 | £704 | £-36 |
| 10 | 3,848 | £701 | +£665 |
| 11 | 3,829 | £697 | +£1,362 |
| 12 | 3,810 | £694 | +£2,056 |
| 13 | 3,791 | £689 | +£2,745 |
| 14 | 3,772 | £686 | +£3,431 |
| 15 | 3,753 | £683 | +£4,114 |
| 16 | 3,734 | £680 | +£4,794 |
| 17 | 3,716 | £676 | +£5,470 |
| 18 | 3,697 | £673 | +£6,143 |
| 19 | 3,679 | £670 | +£6,813 |
| 20 | 3,660 | £667 | +£7,480 |
| 21 | 3,642 | £663 | +£8,143 |
| 22 | 3,624 | £659 | +£8,802 |
| 23 | 3,606 | £656 | +£9,458 |
| 24 | 3,588 | £653 | +£10,111 |
| 25 | 3,570 | £649 | +£10,760 |
How SN25 Compares to the UK Average
Nearby Areas Compared
| Area | Sun Hours | Annual Savings | Payback |
|---|---|---|---|
| SN25 Swindon | 1438hrs | £733/yr | 8.9 yrs |
| SN26 Swindon | 1439hrs | £734/yr | 8.9 yrs |
Battery Storage in SN25
With 4,026 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 SN25? →Get 3 Free Solar Quotes in Swindon
Compare prices from MCS-certified installers near you. No obligation, completely free.
How We Calculated These Figures
Our estimates are based on 1438 annual sun hours for the South West region, a standard 4kW system with south-facing orientation, and 50% self-consumption ratio. Electricity savings use the current average tariff of 24.4p/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 SN25?
Homes in SN25 Swindon save an average of £733 per year with a typical 4kW solar panel system. This is based on 1438 annual sun hours, generating 4,026 kWh of electricity. Over 25 years, the total profit after system costs is £10,760.
What is the payback period for solar panels in SN25?
The average payback period for a 4kW solar panel system in SN25 is 8.9 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 SN25?
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 SN25 Swindon?
Yes. With 1438 sun hours per year (£49 above the UK average savings), SN25 is an above-average location for solar. A 4kW system costs approximately £6,500 and pays for itself in 8.9 years, then generates profit for 15+ more years.
What grants are available for solar panels in SN25?
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.
All postcodes in Swindon • Wiltshire solar overview • Solar savings calculator • Solar panel costs • Choosing an installer • Grants & incentives • All solar guides
Get solar updates for SN25
We'll notify you of changes to solar incentives and electricity prices in your area.