£7,000 - £9,500
Installed price in the UK
4,250 kWh
Annual output
8-11 years
Payback period
5kW Solar System Cost in the UK
A 5kW solar panel system in the UK costs between £7,000 - £9,500 fully installed, including panels, inverter, mounting, and all electrical work. This price includes VAT and assumes a standard roof installation.
With annual savings of £500-£850 on electricity bills and additional export income of £60-£180 through Smart Export Guarantee, a 5kW system typically pays for itself in 8-11 years. After payback, you benefit from effectively free electricity for the remaining 15+ years of panel life.
5kW System Specifications
| System Size | 5kW |
| Number of Panels | 12-14 |
| Roof Area Required | 25-30 m² |
| Annual Generation | 4,250 kWh |
| Price Range (GBP) | £7,000 - £9,500 |
| Annual Savings | £500-£850 |
| Export Income | £60-£180/year |
| Payback Period | 8-11 years |
| CO2 Savings | 1.3-1.6 tonnes/year |
| Best For | 3-4 bedroom house |
* Prices include installation. Actual costs vary by location, roof type, and installer. Get MCS-certified quotes for an accurate price.
Is a 5kW Solar System Right for You?
A 5kW system is the sweet spot for growing families and households with above-average electricity consumption. With 4,250 kWh of annual generation, it provides meaningful surplus for EV charging, battery storage, or export income.
Ideal for
- 3-4 bedroom family homes
- Households using 4,000-5,000 kWh per year
- Homes with or planning an electric vehicle
- Families wanting to future-proof their energy supply
- Properties with heat pumps or high hot water usage
EV-Ready Solar
One of the key advantages of a 5kW system is its ability to contribute meaningfully to electric vehicle charging. On sunny days, the surplus generation can add 30-50 miles of EV range. Paired with a 6-8kWh battery, you can charge overnight using stored solar energy rather than expensive grid electricity.
Cost vs Value
At £7,000 - £9,500, a 5kW system costs roughly 15-20% more than a 4kW system but generates about 25% more electricity. This makes it excellent value per kWh, especially for households that can use most of the energy produced. With savings of £500-£850 per year plus £60-£180 in export income, payback is typically 8-11 years.
Ensure your installer is MCS-certified to qualify for Smart Export Guarantee and meet all UK safety standards.
Battery Pairing for 5kW Systems
A 6-8kWh battery is the ideal pairing for a 5kW system. This allows you to store surplus daytime generation for evening use, increasing self-consumption from around 40-50% to 70-80%.
Recommended Size
6-8kWh
Self-Consumption With Battery
70-80%
Self-Consumption Without
40-50%
Read our complete battery storage guide for brand comparisons, costs, and installation details.
Compare 5kW with Other Sizes
5kW Solar System FAQs
Is a 5kW solar system good for a family home?
Can a 5kW system charge an electric vehicle?
What battery size pairs best with a 5kW system?
How does a 5kW system compare to a 4kW in the UK?
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