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This paper presents an investigation of the potential for coordinated charging of electric vehicles to i) reduce the CO 2 emissions associated with their charging by selectively charging when grid carbon intensity (gCO2/kWh) is low and ii) absorb excess wind generation in times when it would otherwise be curtailed. A method of scheduling charge events that seeks the minimum carbon intensity of charging while respecting EV and network constraints is presented via a time-coupled linearised optimal power flow formulation, based on plugging-in periods derived from a large travel dataset. Schedules are derived using real half-hourly grid intensity data; if charging in a particular event can be done entirely through use of renewable energy that would otherwise have been curtailed, its carbon intensity is zero. It was found that if 'dumb' charged from the current UK mainland (GB) grid, average emissions related to electric vehicle (EV) charging are in the range 35–56 gCO2/km; this can be reduced to 28–40 gCO2/km by controlled charging – approximately 20–30% of the tailpipe emissions of an average new petrol or diesel car sold in Europe. There is potential for EVs to absorb excess wind generation; based on the modelled charging behaviour, 500,000 EVs (20% of Scotland's current car fleet) could absorb around three quarters of curtailment at Scotland's largest onshore wind farm. • Electric vehicle (EV) charging is scheduled for minimum carbon intensity. • EVs' potential to absorb excess renewables by charging selectively is investigated. • Real GB grid carbon intensity (gCO 2 /kWh) and wind curtailment data used. • Scheduling can reduce EV emissions from 35 to 56 gCO 2 /km to 28–40 gCO 2 /km. • 500,000 EVs can absorb 75% of curtailment at GB's largest onshore wind farm. [ABSTRACT FROM AUTHOR]

Energy prosumption has become a common phrase as more householders and communities are producing and consuming their own electricity and heat. Prosumption is a combination of two words: production and consumption, and emerged as a concept at a time when consumers were beginning to be more proactive and take over steps traditionally thought of as ‘production’. In many ways, energy prosumption is nothing new (e.g. wood combustion), yet development of our modern energy system has changed the relationships between energy producers and consumers (e.g. smart meters, renewable energy production). Thus, there is a growing body of research interested in the motivation and conditions for the uptake of microgeneration technologies and the implications to energy infrastructures and big energy producers. However, this ‘energy prosumption’ scholarship generally lacks a strong conceptual foundation and misses the opportunity to build on existing prosumption literature and related debates. This paper brings the wealth of literature on prosumption into the energy context and reflects on the insights offered by a prosumption lens. Our study explores a particular manifestation of prosumption – when a household is simultaneously a producer and consumer of their heat and/or electricity via microgeneration – and we present data from semi-structured interviews with 28 households living with microgeneration technologies in Scotland, UK. Thus, we provide a robust framework from which future research on household and community energy prosumption can build. [ABSTRACT FROM AUTHOR]