Charging at home is advantageous, but the bill will continue to increase

A study of household habits regarding electricity consumption shows that even if EV drivers benefit from installing a charging station in their home, the final bill remains high.

A woman locks up her car / Credit: Unsplash

ChargeGuru sells turnkey charging solutions in seven European countries. The terminals offered have outputs of 2.2 kW to 22 kW. According to the company the most suitable type of end device for home use is the one with a power of 7.4 kW. It allows you to regain 30 to 40 kilometers of autonomy per hour. This is chosen by 81% of respondents. 11% of households have a 3.7 kW terminal, which only returns the equivalent of 15 km per hour.

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Of course, needs and habits vary greatly from household to household, but the company was able to learn a lot from its study. First of all, and quite logically, installing a home charging station increases the electricity consumption of the house, and not just slightly. The daily peak consumption of the household increased by 28% to 3.7 kW. We are slowly approaching 6 kVA, the minimum rating of current French electricity meters, which is fixed at 6 kVA.

A home charging station is economical, but still increases the electricity bill

A third of those surveyed charge their vehicle between 7:00 p.m. and midnight and another third between 12:00 a.m. and 6:00 a.m. The vast majority of people only connect their car to the charging station two to three times a week. The observation remains the same regardless of the habits of others: the electricity bill increases by 21%and at the end of the month other amounts of between €30 and €40 are added, which weigh on the family budget.

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Therefore, in times of chasing energy waste, ChargeGuru customers have taken measures to save as much as possible: installation of a load management system, off-peak charging. As for the total electricity consumption of the house before and after the installation of the terminal, the study observes an average increase of 21% from 16 kWh to 19.4 kWh. Logically, the house’s electricity bill increases in quite a similar fashion. With an average consumption of 51 kWh for charging the car, charging at home costs money between 30 and 40 € per month, according to the tariffs of the electricity provider. Even if Tesla has lowered the prices for the superchargers and now offers off-peak hours, a corresponding charge there would cost around 31 euros.