Tuesday, September 22, 2020
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Free electricity charged from the market can also be transported for home use – why doesn’t the practice taste good for Finnish electric motorists? – Cars


One of the obstacles to home delivery is Finland’s three-phase electricity network, experts from the Finnish Automotive Technology Association SATL say.

The so-called V2H, or Vehicle-to-Home technology, refers to the transfer of electricity from a car to a home.

In other words, the idea of ​​vehicle-to-home technology is to utilize the electricity stored in car batteries, for example during the highest price periods of home electricity consumption during the day and to charge the battery from the grid at times when electricity is cheaper, for example at night.

It is also technically possible to charge the car’s batteries, for example, at a free electrical outlet in the market, and to use that battery electricity later, for example, for cooking and heating at home or in a cottage.

However, in the case of homes and cottages, we have very few such systems, ie the electricity provided by public chargers is regularly used only for electric cars.

But why is V2H technology not already in use in Finland, even though we have seen various related pilot projects?

For this question, a master’s degree in electrical engineering and an expert from the Finnish Energy Industry Association Tuukka Heikkilä, Chairman of the Finnish Automotive Association SATL and Development Director of Taitotalo Kari Kaihonen, Lecturer in Metropolia Automotive Electronics Vesa Linja-aho, trainer and expert in electrical and hybrid driving technology Frans Malmari Diagnolta and three other Finnish experts in the field of automotive technology together answer as follows:

V2H, or V2G (Vehicle-to-Grid vehicle-to-grid) technologies are not yet widely used, but the development of intelligent vehicles, chargers and grids is ongoing and has great potential to offset electricity consumption across the grid as all-electric cars become more common.

V2H is a fairly expensive technology so far. It has also so far only been launched in countries whose residential electricity connections are usually single-phase. The three-stage method commonly used in Finland is not technically a problem, but it raises the price of the system.

In addition, if the V2H system requires reserve power, the inverter must be very robust to provide sufficient short-circuit current so that electrical safety is not compromised.

You can find more of these set of electric car questions and their answers with the answers below.

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