An Energy Performance Certificate rates a property's energy efficiency from A to G, required when selling or renting and for accessing certain renewable energy incentives.
An Energy Performance Certificate (EPC) is a document that rates a property's energy efficiency on a scale from A (most efficient) to G (least efficient). It includes recommendations for improving efficiency.
| Rating | Description |
|---|---|
| A | Most efficient (92-100) |
| B | Very efficient (81-91) |
| C | Efficient (69-80) |
| D | Average (55-68) |
| E | Below average (39-54) |
| F | Poor (21-38) |
| G | Least efficient (1-20) |
EPCs are legally required when:
For solar PV installations, EPCs are relevant because:
EPCs must be produced by accredited Domestic Energy Assessors (DEAs). The assessment typically takes 45-60 minutes and costs around 80-120 GBP.
Solar photovoltaic systems convert sunlight directly into electricity using semiconductor cells, enabling homes and businesses to generate their own renewable power.
The Smart Export Guarantee requires licensed electricity suppliers to offer payment for exported renewable electricity from small-scale generators like solar PV.
Microgeneration Certification Scheme certification is required for installers to provide renewable energy systems that qualify for government incentives and feed-in tariffs.
Heat pumps extract warmth from air, ground, or water to heat buildings efficiently, eligible for government incentives when installed by MCS-certified installers.