The Energy Performance Validation Scheme (EPVS) is a certification standard that certifies the processes used by installers to ensure energy saving, generating and/or storing calculations/ estimates for home energy products are accurate and valid. We aim to protect consumers from receiving overinflated figures from installers when making a purchase by sampling the contractual paperwork to ensure that it meets our certification standard. We maintain a comprehensive Professional Indemnity insurance as part of our certification standards for energy performance calculations / estimates and monetary savings.