How much do solar panels cost to install in the UK?

Solar panel costs in the UK have fallen significantly in recent years. A typical 3–4kWp system (10–12 panels) for a 3-bedroom house costs between £6,000 and £9,000 installed, including panels, inverter, mounting, cabling, and connection to your consumer unit. Adding a battery storage system costs an additional £3,000–£5,000 depending on capacity. The Smart Export Guarantee (SEG) allows you to sell surplus electricity back to the grid — compare tariffs from different energy suppliers. Most systems pay back their cost in 10–15 years through energy savings and export income. Solar panels qualify for 0% VAT in the UK.