Publication: Charging island homes

Do you think islands can benefit from the use of Electric Vehicles?

It’s quite reasonable to agree on the benefits.

Because of the limited distances, because of the availability of renewables, lack of local fuels and high energy dependence, and because of the environmental impact, electric mobility apparently fits there like a glove.

Besides, resiliency to face weather events by storing energy in the vehicle, and reducing peak electrical demand on normal conditions seem to be economically beneficial.

kreta-1364084 car island

Image taken in Crete by Repsaj on freeimages

The research we recently got published in Energy, focuses on the effect of using the vehicle’s energy to charge the home at peak load and charge the vehicle* during valley.

This is what we found out…

A consumer with an electric vehicle can install a bi-directional charger at home and use the battery for his main consumption at arrival on afternoons.

Then charge the battery at a lower price at night for both mobility and home day consumption.

This is the basis to analyse the net impact and the consequences for the individual;

For the system (the case is the Canary Islands) a 20% penetration of electric vehicles with this functionality changes the load peak demand to the start of the low priced time of use. For this effect, time-of-usage pricing is themost appropriate solution. The effect in the long term with variable tariffs seems to be a variable load curve, not flattened as it might appear at first.

For the user, there is a clear decrease in mobility costs of above 50% and the cost-to-benefit increases with the energy consumption done per day from the vehicle, so for example, above 7 kWh per day the saving can surpass 200€ per year. One important result today is that if the tariff difference between peak and valley is not higher than 7,39 c€/kWh, there would be no direct economical benefit to the consumer.

In summary, the research shows that the smart grid can be built bottom-up, that we might not need batteries without wheels and buildings and electric vehicles are a powerful combination.

(*And not only road vehicles but also boats can make the transition…)

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