The prices for photovoltaic systems have steadily decreased in the United Kingdom. According to official data from the Department for Energy Security & Net Zero (DESNZ) and the Energy Saving Trust, costs for small-scale residential rooftop systems (up to ~4 kW) have dropped to roughly £1,876 per kW for installations up to 4 kW and ~£1,780 per kW for 4–10 kW systems (a ~19–21 % decrease versus the prior year). 

Current Price Information in the UK:
• Small and residential scale (up to ~4 kW): ~£1,876 per kW installed. 
• Medium residential scale (4–10 kW): ~£1,780 per kW installed. 
• Typical 4 kW home system (including installation): ~ £6,600-£8,100 as of October 2025. 

Additional Costs in the UK:
Despite module and system cost reductions, total install cost still depends on roof type, labour, scaffolding, network connection, monitoring & smart export arrangements (via the Smart Export Guarantee). VAT on solar panels and installation is zero % in many cases, improving affordability. 

Conclusion:
The cost of photovoltaic systems in the UK has seen a notable decline, making solar energy an increasingly viable investment. However, total costs vary considerably depending on region, house‐type, roof orientation, and installer offering. Requesting quotes from multiple providers is strongly recommended to secure the best deal.

Through the renovix comparison, you can easily find reliable solar providers and compare offers for solar systems without extensive searching. This comparison of competing providers allows you to choose the best package in terms of price and performance.

To ensure that your solar system delivers optimal yields, it is crucial that the system is installed by experienced solar technicians who can also provide reliable service when needed.

Good solar manufacturers typically offer at least a 10-year product warranty on their solar modules and additionally provide a performance warranty for solar output for at least 20 years. In the event of a warranty claim, it can be advantageous to claim the warranty with a UK solar company rather than with a company in Asia.

By following these points, you are on the safe side and can soon count yourself among the winners in the field of solar systems.