What is EPC Rating?
Energy Performance Certificate, the UK's energy efficiency label for homes, rated A (best) to G (worst).
Quick Answer
Solar panels typically improve a home's EPC rating by 1–2 bands. For example, a D-rated home might improve to C with a 4kWp solar system. An EPC assessment (£60–£120) is required when selling or letting. The average EPC rating for UK homes is D. Homes with better EPC ratings command higher sale prices, research shows each EPC band improvement adds 1–3% to property value.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
EPC Rating Explained
An EPC (Energy Performance Certificate) is a standardised measure of a building's energy performance, similar to the energy label on household appliances. Ratings range from A (most efficient) to G (least efficient). The EPC is based on the building's fabric, heating system, ventilation, lighting, and renewable energy systems. An EPC is required when selling or renting a property in the UK. Adding solar panels improves a home's EPC rating.
How Does EPC Rating Work in the UK?
Solar panels typically improve a home's EPC rating by 1–2 bands. For example, a D-rated home might improve to C with a 4kWp solar system. An EPC assessment (£60–£120) is required when selling or letting. The average EPC rating for UK homes is D. Homes with better EPC ratings command higher sale prices, research shows each EPC band improvement adds 1–3% to property value.
Frequently Asked Questions
Do solar panels improve my EPC rating?
Yes. A 4kWp solar PV system typically improves an EPC rating by 1–2 bands, which can increase your property value by 2–6%.
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John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.