What's the average cost to have solar panels installed by Octopus Energy?

The cost of installation can depend on how many panels you need, whether you choose to haveThe cost of installation can depend on how many panels you need, whether you choose to have battery storage, and what size of battery you require. The cost of a panel-only installation by Octopus starts from £6,663 (for 2 panels). Our most popular system is a 12 panel installation with a 10kWh smart battery which costs £11,115 All costs are based on July 2026 prices.

You'll have the option to pay monthly with a fixed-term loan, or pay in full after installation. We'll ask you to pay a non-refundable deposit of £500 when you sign your installation agreement.

Find out how long it takes for a solar system to pay for itself.

To get an instant view on your costs and savings, try our solar explorer tool or find all of our solar and battery FAQs here.