Solar Panels Portsmouth: Costs, Savings & Local Data
How much can solar panels save you in Portsmouth?
A typical 4kW solar panel system in Portsmouth generates around 4,200 kWh per year, saving you approximately £610 annually on electricity bills and export payments. With 1,750 hours of sunshine per year, most Portsmouth homeowners see payback within 10–13 years.
Portsmouth receives around 1,750 hours of sunshine each year. A typical 4kW solar panel system here can generate approximately 4,200 kWh annually, providing meaningful savings on your electricity bills and reducing your household's carbon footprint.
Portsmouth receives around 1,750 hours of sunshine per year, making it one of England's sunnier cities. Portsea Island's flat, south-facing aspect gives solar panels an excellent opportunity to perform at their best. The city's housing ranges from the dense Victorian terraces of Southsea to post-war semis in Cosham and Drayton, and most properties have sufficient roof space for a worthwhile solar installation.
Solar panel key figures for Portsmouth
1,750 hrs
Annual sunshine hours
Met Office / PVGIS regional data
4,200 kWh
Annual generation (4kW)
Based on 1050 kWh/kWp yield
£610
Annual savings (4kW)
At 24.5p/kWh + SEG
~11 years
Estimated payback
Based on average 4kW system cost
Solar panel savings by system size in Portsmouth
The table below shows estimated costs, annual savings, and payback periods for different solar panel system sizes in Portsmouth. Figures are based on a south-facing roof with no shading, using Portsmouth's regional solar yield of 1050 kWh/kWp.
| System Size | Panels | Cost | Annual Saving | Payback |
|---|---|---|---|---|
| 3 kW | ~8 panels | £4,500–£6,500 | £457 | ~12 years |
| 4 kW | ~10 panels | £5,500–£8,000 | £609 | ~11 years |
| 5 kW | ~13 panels | £6,500–£9,500 | £761 | ~11 years |
Solar energy in Portsmouth: local context
The South East benefits from some of the highest solar irradiance in the UK. Homes across the region — from coastal towns to commuter belt suburbs — see above-average solar generation, making the financial case particularly strong.
Portsmouth homeowners benefit from 0% VAT on residential solar installations (until at least March 2027) and can earn income through the Smart Export Guarantee by selling surplus electricity back to the grid.
Take the next step
Connect with trusted local installers and get accurate pricing for your home.
Get My Free QuoteFree, no obligation. Takes 2 minutes.
Frequently asked questions about solar panels in Portsmouth
Solar panels in nearby areas
Showing areas near Portsmouth. Solar conditions vary by location.
Take the next step
Connect with trusted local installers and get accurate pricing for your home.
Get My Free QuoteFree, no obligation. Takes 2 minutes.