What solar panels cost in the UK

A domestic quote is normally made up of:

• Panels — the number fitted and the model, output and warranty of each.
• Inverter — a single string inverter, or a hybrid inverter if a battery is included or planned.
• Optimisers or microinverters, where shading makes them worthwhile.
• Mounting, roof works, cabling, isolators and a generation meter.
• Scaffolding and access, which varies a lot with the property and roof height.
• Electrical works, notification to the network operator and certification.
• Labour, and the installer's warranty and aftercare.
• Battery storage, if you include one.

Quotes vary because the specification varies. A cheaper quote may use fewer or lower-output panels, omit optimisers on a shaded roof, assume simpler scaffolding, or offer a shorter workmanship warranty. A more expensive quote may include a battery, a hybrid inverter for a future battery, roof repairs, or a longer aftercare package.

Compare cost per kWp of installed capacity, then compare what is included, rather than comparing two headline totals. Ask each installer to price the same specification if you want a like-for-like view.

Scaffolding on a difficult or three-storey property, replacing an old or failing consumer unit, strengthening or repairing roof timbers or tiles, bird protection, and any charge for the export arrangement or a smart meter upgrade. None of these are hidden fees when they are quoted up front — they become surprises only when they are not.

Also check VAT treatment, whether the price is fixed or subject to survey, and what happens to the price if the survey changes the design.

It helps to know roughly what size of system your roof and electricity use point to. Our free assessment gives an indicative system size and annual saving range from seven questions, so you can have a more informed conversation. It is an estimate based on your answers and standard UK assumptions, not a quotation.