Install Solar Panels Cost Breakdown for UK Homeowners

The six main cost drivers

Every solar quote combines the same core parts. The mix of those parts explains most of the difference between quotes. Knowing each factor helps you read a quote with confidence. The list below explains each driver in plain terms.

• System size. More panels produce more electricity, but they add equipment and labour. Your installer should size the system to your energy use and usable roof space.
• Roof type and condition. Roof shape, pitch, material and condition all affect the fitting work. A roof that needs repair should be fixed before panels go on.
• Scaffolding. Most installs need safe access to the roof. Scaffolding often appears as a separate line on your quote.
• Inverter. The inverter converts the electricity from your panels into the type your home uses. Inverter models differ in features and warranty length.
• Battery add-on. A battery stores electricity for later use and adds to the total cost. You can add one at the start or later.
• MCS-certified installation. Certified installers meet set standards for design and fitting. Many funding routes require an MCS-certified install.

How to get and compare quotes

A fair comparison starts with like-for-like quotes. Ask every installer to survey your home before they price the job. Request the same details from each firm, then compare the totals. Follow these steps to keep the process simple.

1. Note your annual electricity use from recent energy bills.
2. Find at least three installers through the MCS installer search.
3. Book a home survey with each installer.
4. Ask for a written, itemised quote that lists every cost driver above.
5. Compare total cost, equipment models, warranties and the expected install date.
6. Check each installer's MCS certification number before you sign.

Take your time over the decision. A reputable installer will not pressure you to sign on the day of the survey.

Paying for your system

You can pay from savings, take a loan or use installer finance. The Warm Homes Loan Scheme sets a £15,000 maximum for solar panels. It sets a separate £15,000 maximum for battery storage. Treasury backing lets lenders offer rates up to 5 percentage points below their normal rates, and some borrowers may get 0%.

Loan terms run from 3 years up to 30 years in some cases. Terms over 20 years can carry higher rates and a much higher total cost. Some products are secured loans, such as second mortgages. Three details are not yet confirmed. The Government has not published the eligibility rules. It has not confirmed how or when you apply. Each lender has not yet published its rates.