System size
More panels and higher inverter capacity usually increase equipment cost, while larger systems can change the cost per installed kW.
Home›How much do solar panels cost in the UK?
HEY SOLAR GUIDEHow much do solar panels cost in the UK?
A useful solar quote is built around your property, not a headline package price. Here are the factors that move the number.
THE SHORT ANSWER
There is no single meaningful UK solar-panel price because the installed cost changes with system size, roof/access requirements, electrical work, equipment choice and whether battery storage is included. Compare like-for-like system specifications and assumptions rather than headline package prices.
Roof & access
Roof material, height, pitch, scaffolding, access constraints and remedial work can materially affect installation cost.
Battery choice
Adding battery storage changes both upfront cost and how energy can be used. Capacity, power output, chemistry, warranty and controls matter.
Electrical work
Consumer-unit changes, cable routes, earthing, metering and network requirements can add work that is not visible from a simple online estimate.
Use this checklist before you compare proposals.
- Installed system size in kWp
- Number and rating of panels
- Inverter and monitoring specification
- Scaffolding/access included
- Electrical upgrades included
- Battery capacity and power if applicable
- Warranty and aftercare
Why can two quotes differ so much?
They may describe different system sizes, equipment, roof works, electrical work, warranties or battery specifications. Compare the scope line by line.
Should I choose the cheapest quote?
Price matters, but so do design assumptions, equipment, installation scope, certification, warranties and the credibility of projected savings.
What about VAT?
Current GOV.UK guidance says qualifying installations of energy-saving materials, including solar panels and electrical storage batteries, can receive temporary zero-rate VAT treatment. Eligibility and timing matter, so check the current official guidance and your installer’s treatment.
CHECKED AGAINST OFFICIAL GUIDANCE
Time-sensitive scheme, tax and eligibility details can change. HEY Solar separates indicative modelling from current rules and links to primary sources.
Reviewed: September 2026. Always check the linked source for the current position.NEXT STEP
Turn research into a property-specific conversation.
Online information can narrow the options. A useful quotation needs the real property, energy use and project requirements.