Solar Panels in Portsmouth, Hampshire
Portsmouth is a city in Hampshire with a population of 214,905. With a solar yield of 1000 kWh/kWp and 1,660+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 4,000 kWh annually, covering 105% of average household electricity use. With 0% VAT on installation, the typical cost is £5,000–£8,000 for a 3-4kWp system with payback in 6–8 years.
How productive are solar panels in Portsmouth?
| Solar Metric | Value |
|---|---|
| Solar Yield | 1000 kWh/kWp |
| 4kWp System Output | 4,000 kWh/yr |
| Sunshine Hours | 1,660 hrs/yr |
| Est. Annual Savings | £1120+ |
| Household Coverage | 105% of avg use |
Solar yield calculated for Portsmouth (50.80°N, 1.09°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Portsmouth at a Glance
| Area Data | Value |
|---|---|
| Population | 214,905 (Census 2021) |
| Elevation | 3 metres |
| Postcode Area | PO1 |
| Location | Coastal |
| Coordinates | 50.8000°N, 1.0910°W |
Population and housing data: ONS Census 2021.
About Solar Energy in Portsmouth
Portsmouth is a city in Hampshire with a population of 214,905 (ONS Census 2021). Portsmouth's coastal position means good exposure to sunlight, though installations should account for higher wind loads and salt air. The postcode area for Portsmouth is PO1. You'll need your full postcode when getting quotes from MCS-certified installers. Based on satellite data for this location, a 4kWp solar system generates approximately 4,000 kWh per year (1000 kWh/kWp). Hampshire ranks #8 in the UK for solar yield, making Portsmouth an excellent location for solar panels.
Benefits of Solar Panels in Portsmouth
Save on Electricity Bills
Homeowners in Portsmouth can save an estimated £1120+ per year on electricity with a 4kWp solar system generating 3,960 kWh annually.
0% VAT on Installation
Residential solar panel installations are zero-rated for VAT in the UK, saving you hundreds of pounds on a typical system.
MCS Certified Quality
All installations use MCS-certified installers, ensuring high standards and eligibility for the Smart Export Guarantee (SEG).
Earn from Excess Energy
Sell surplus electricity at 3-15p/kWh through the Smart Export Guarantee (SEG). Your energy supplier pays you for every unit exported to the grid.
Coastal Location Advantage
Portsmouth's coastal position often means fewer obstructions and clearer horizons for solar exposure. Modern panels are designed to withstand coastal conditions including salt air.
25+ Year Lifespan
A system installed in Portsmouth today will generate clean electricity for 25-30 years with minimal maintenance.
0% VAT and Savings for Solar in Portsmouth
Homeowners in Portsmouth, Hampshire benefit from 0% VAT on solar panel installations. Typical system costs for 2026:
| System Size | Typical Cost (incl. 0% VAT) | Est. Payback |
|---|---|---|
| 2 kWp | £3,000 - £4,500 | 7-8 years |
| 3-4 kWp | £5,000 - £8,000 | 6-8 years |
| 5-6 kWp | £7,000 - £10,000 | 6-7 years |
Solar Installers in Hampshire
MCS-certified solar panel installers covering Hampshire.
Solar coverage near Portsmouth
Also serving nearby areas in Hampshire:
Find Solar Installers in Hampshire
Browse MCS-certified installers covering Portsmouth and all of Hampshire.
What Portsmouth homeowners ask about solar
How much do solar panels cost in Portsmouth?
A 3-4kWp system in Portsmouth typically costs £5,000-£8,000 with 0% VAT. The system generates approximately 3,960 kWh/year, paying for itself in 6-8 years.
What size solar system do I need for my home in Portsmouth?
Most homes in Portsmouth benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 105% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
Can I add a battery to my solar system?
Yes. A home battery (typically 5-10 kWh) stores excess solar electricity for evening use. This increases your self-consumption from around 30-40% to 60-80%. Batteries currently cost £3,000-£6,000 and also benefit from 0% VAT.
What is the difference between solar PV and solar thermal?
Solar PV panels generate electricity from sunlight. Solar thermal panels heat water directly. For most UK homes, solar PV is the better investment: it's more versatile, benefits from 0% VAT, and you can sell excess electricity via the SEG. Solar thermal only heats water.
Can I sell excess solar electricity?
Yes. Under the UK's Smart Export Guarantee (SEG), you can sell surplus electricity at 3-15p/kWh. You need a smart meter and an MCS-certified installation. Your energy supplier pays you for every unit exported to the grid.
What roof direction is best for solar panels in Portsmouth?
South-facing roofs produce the most electricity (100% of potential). South-east and south-west roofs produce around 95%. East or west-facing roofs still produce 80-85%. North-facing roofs are generally not recommended for solar panels in the UK.
What maintenance do solar panels need?
Solar panels need very little maintenance. Rain keeps them clean in most cases. There are no moving parts. Your inverter may need replacing once in 25 years (10-15 year lifespan). Annual visual checks and occasional cleaning if near trees is all that's needed.
Sources
- MCS — Microgeneration Certification Scheme
- MCS — Find a Certified Installer
- Ofgem — Smart Export Guarantee (SEG)
- PVGIS — EU Joint Research Centre (solar irradiance data)
- ONS — Census 2021
- Met Office — Climate Data
Last updated: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Get a Free Solar Quote in Portsmouth
Connect with MCS-certified installers covering Portsmouth,Hampshire.