Question 1

Do I need planning permission to install solar panels?

Accepted Answer

In most cases, no. Solar panels on a residential roof in England, Scotland, and Wales are considered permitted development, meaning no planning permission is required as long as the panels do not protrude more than 200mm from the roof surface. Exceptions apply to listed buildings and conservation areas.

Question 2

How long does a solar and battery installation take?

Accepted Answer

A typical solar panel installation takes one to two days. Adding a battery storage system adds half a day to a full day. From accepting a quote to having panels fitted, most homeowners wait between two and six weeks.

Question 3

What happens to the energy my panels generate that I don't use?

Accepted Answer

Surplus electricity is stored in your battery for later use. Once the battery is full, excess generation is exported to the National Grid. Under the Smart Export Guarantee (SEG), your energy supplier pays you for every unit you export, typically between 4p and 15p per kWh.

Question 4

How much does a solar and battery system cost?

Accepted Answer

A typical 4 kWp solar system costs between £6,000 and £9,000 installed. Adding a 9.5 kWh battery adds approximately £3,500–£5,500. VAT on residential solar installations is currently 0% in the UK until 2027.

Question 5

How long will my solar panels last?

Accepted Answer

Most modern solar panels carry a 25-year performance warranty guaranteeing at least 80% of their original output. Inverters typically last 10–15 years. Battery storage systems generally carry a 10-year warranty.

Question 6

Will solar panels work on a north-facing roof?

Accepted Answer

South-facing roofs produce the most energy. East- and west-facing roofs still generate around 80–85% of optimal output. North-facing roofs produce 50–60% of a south-facing equivalent and are generally not recommended.

Question 7

What is an MCS-certified installer and why does it matter?

Accepted Answer

MCS (Microgeneration Certification Scheme) is the UK industry standard for renewable energy installations. Using an MCS-certified installer is required to access Smart Export Guarantee payments and to validate product warranties.

Question 8

Can I get a solar system if I rent my home or live in a flat?

Accepted Answer

Solar panels are generally only suitable for homeowners as they require structural roof modifications. Renters would need explicit written permission from their landlord. For flats, shared roof ownership makes installations more complex.

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