How to Find Your EPC Rating Before Going Solar
16 August 2026 3 min read
Before you spend anything on solar panels or a home battery, it's worth knowing where your property actually stands. An Energy Performance Certificate (EPC) is the closest thing most UK homes have to a standardised energy report card. It grades the property from A to G, estimates annual running costs, and lists the improvements an assessor thought would make the biggest difference — often loft insulation, glazing, heating controls and, increasingly, solar photovoltaics.
Why your EPC matters for solar and battery plans
Solar and storage work best on a home that isn't leaking energy. If your EPC flags poor insulation or an ageing boiler, fixing those first usually gives a faster payback than any generation kit. The certificate also records roof type, floor area, glazing and existing renewables, which are exactly the details an installer will ask for when sizing a system. And if you're on a time-of-use tariff, the EPC's estimated annual electricity consumption is a useful starting figure for working out how much battery capacity you actually need.
How to look yours up
Most homes sold or rented in England, Wales and Northern Ireland since 2008 already have an EPC on public record, and it stays valid for ten years. The quickest route is to search by address on the EPC register at Address Reports, which pulls the certificate along with the recommended improvements and the estimated energy costs for the property. If you want a broader picture of the address — property details and related energy data in one place — start at addressreports.co.uk. If nothing comes up, your home may never have needed one, and you can commission a new assessment from an accredited assessor.
What to do with the result
Read the recommendations section rather than fixating on the letter grade. Note the estimated annual electricity use, check whether solar PV is listed as a suggested measure, and see what the assessor said about your roof. With those three numbers in hand you can size a battery sensibly instead of guessing — an AEG 4.8 kWh unit suits a modest household shifting off-peak electricity, while larger homes with existing solar usually get more from AEG 9.6 kWh or above.
One caveat: an EPC is a modelled estimate, not a meter reading. Treat it as a planning tool, then sense-check it against your own bills before committing to anything.