New smart multi-metering or multi-functional Advanced Metering Infrastructure (AMI) is capable of creating value for energy consumers, network operators, metering operators and retailers. AMI will provide better services for customers in various ways: not only by more accurate metering and billing, but also by easing the supplier switching process and also by facilitating demand response to price and network signals that eventually will reach the consumer. With AMI technology, consumers can be aware of prices and CO2 emissions associated with their consumption. Although there are some commercial systems capable of supporting AMI, there is great lack of interoperability among systems, preventing the large-scale adoption of the smart multi metering. The main problem for the large-scale adoption is the lack of a set of widely accepted open standards capable of guaranteeing the interoperability of systems and devices produced by different manufacturers. The main objective of the OPEN meter project is to specify a comprehensive set of open and public standards for AMI, supporting electricity, gas, water and heat metering, based on the agreement of all the relevant stakeholders in this area. Partners will carry out activities resulting in identifying and filling the knowledge gaps necessary to enable relevant industries to agree, implement and embrace the new set of international standards specified. The project will take advantage of the existing International and European standards, technologies and solutions, adapting them to the specific needs of AMI where possible, and carrying out the research and technological development activities where necessary. The OPEN meter consortium comprises world-wide leading electricity, water, gas and heat meter manufacturing industry, alongside with some of the largest multi-utilities in Europe, and the official standardization body CENELEC, so the support of the majority of the relevant stakeholders in the area is ensured.