My research concerns measurements, energy system analysis, active energy consumers and improvements in the energy market functions. Research also include zero-energy buildings, flexible energy consumption/demand-response and micro/distributed generation with renewables. A special interest has been the deployment of Smart Meters (AMI, AMM, AMR) and how to create added values, including both consumers and energy utilities. The research covers increased use of energy consumption information, and how it should be made available to consumers, third-party suppliers and others. With available energy consumption data it is possible to create better data-driven models, based on a bottom-up modeling approach, with each consumer included in the model. This requires a new modelling framework, methodologies and fuctions to process, analyse and visualise large amount of data.