Joint Research Centre - European Commission

JOINT RESEARCH CENTRE
The European Commission's in-house science service
European Commission

Drawing of a car with a plug

Controlled recharging supported by smart grids would avoid electricity-demand spikes© EU, 2013

Recharging electric cars at home could encourage a wider use

 

Enabling owners to charge their electric-drive vehicle (EDV) at home, while parked in a garage or at the kerbside, is a key factor in promoting their diffusion, while smartly managed and planned recharging time and rates would mitigate the need for expansion of the electricity grid and generation capacity. These are the main findings of a JRC report analysing the probable load on the electricity network by drivers recharging their electric cars in different probable scenarios.

The report "Projections for electric vehicle load profiles in Europe based on travel survey data" estimates load profiles on the basis of detailed travel survey data from six European countries (France, Germany, Italy, Poland, Spain and the United Kingdom), representing more than ¾ of the new car market in European Union.

The scenarios show that drivers charge their cars whenever they are parked, which would result in several electricity-demand peaks across the day, with significant spikes in the morning, early and especially late afternoon. Controlled recharging – for example during periods of overall lower electricity consumption – supported by 'smart' power grids, able to respond to the consumer's behaviour, is a way to prevent overburdening the network.

As cars are generally parked at home longer than in any other place, electric cars will most likely be charged at home, which is also what the drivers would prefer, according to the JRC research. Providing the possibility to recharge at home or at the kerbside for those who do not own a private garage, is, therefore key to avoid demand peaks.

Appropriate infrastructure needs to be complemented with a policy to expand the capacity of electricity supply, as the demanded energy during an evening peak could represent a considerable share of the available power. The need for capacity expansion could be reduced if the charging time and rate is smartly managed and planned.

The report in which these findings are published is the last in a series of four JRC reports dealing with electro-mobility aspects in Europe.

 

28/08/13