How Much Would 12 Solar Panels Cost?

Extra work may be needed where:

• The roof is difficult to access
• Scaffolding is more complicated
• Panels need to be installed on more than one roof section
• Electrical equipment needs upgrading
• The roof covering needs attention
• Additional cable runs are required
• A battery is added

Flat roofs can also involve additional mounting equipment. The roof must be able to support the added weight of the system.

This is one reason an unusually cheap online estimate should not be treated as a final quotation.

What Happens During Solar Panel Installation?

Once you have accepted a quotation, there are several practical stages before the system starts producing electricity.

The installer may arrange scaffolding before arriving to work on the roof. They then fit the mounting brackets, secure the panels, run the necessary cabling and connect the inverter to the home's electrical system.

If you are also having a battery installed, that forms part of the same project.

Energy Saving Trust says a standard rooftop installation generally takes one to two days, although more complicated projects can take longer.

If you want to understand what happens from the initial assessment through to testing and handover, this guide to the solar panel installation process explains each stage in more detail.

How Should You Compare Solar Installation Quotes?

Do not compare three quotes by looking only at the total price.