Tesla lays the foundation stones for the bi-directional load

If this functionality may seem unimportant for many readers, it opens the productions of the American manufacturer to a number of scenarios likely to make electric cars more desirable. In particular as a link facilitating the deployment of green energies and participating in the balancing of electrical networks.

Unexpected discovery

In an article dated yesterday, Tuesday May 19, 2020, Electrek uncovers that ” engineer involved in the disassembly of a Model 3 has shown that Tesla’s on-board charger is ready for two-way charging ” The manufacturer could potentially activate this V2G (vehicle with electric network) functionality on a fleet of 100,000 electric vehicles.

In July 2018, Elon Musk indicated in a Tweet that ” very early on we were able to use our cars as a power source “And was planning to” review that

The weak point of free recharging being eliminated

When the Tesla were sold with unlimited free access to superchargers, opening the V2G would inevitably have given rise to misuse. After going through a station of the manufacturer, it would have been possible to supply electricity at no cost to the office or part of the house. A scenario that could have cost Tesla dear.

Now that the percentage of vehicles associated with free charging on superchargers is becoming negligible, it is time to take these American electric cars into another dimension. Especially since the brand encourages refueling at home, in particular via the solar solutions marketed by the company.

Before putting Tesla models in the middle of electrical networks, the manufacturer will need a long validation path and establish strategic partnerships in the V2G field.


Concretely, and as a reminder, the V2H (Vehicle to Home, from car to home), V2B (Vehicle to Building, from car to building), and V2G (Vehicle to Grid, from car to network) architectures, summarized in V2x (Vehicle to everything, from the car to any application), allow, via two-way charging, to draw energy from the batteries of plug-in electric and hybrid cars connected to supply electricity to a house, building or support the National Network.

This requires very fine management of the fleet of vehicles which will need to have sufficient autonomy when their users need to use them.

In France, it is estimated that this solution would prevent the opening of new nuclear reactors to meet the growing demand for electricity, and, above all, the peaks of increasing demand at certain times.

Pioneering manufacturers

Some manufacturers, mainly Japanese, have a head start on the subject V2x. Which ? In particular those who still cling to the CHAdeMO standard which made bidirectional charging possible a few years ago. We also come with Combo CCS now.

First of all, Nissan has multiplied communications, partnerships and demonstrators for a city, businesses, buildings and networks where electric cars come to help balance power, to clean up the footprint. polluting energy production, and reducing electricity bills.

With batteries of modest energy capacity, Mitsubishi is already marketing an offer called Dendo Drive House to produce, store and rebroadcast energy. It consists, in addition to the vehicle, of solar panels to be installed on the roof of the house; a buffer storage battery, a two-way charger, and a household energy management system.

Rescue unit

With the 13.8 kWh pack of a rechargeable Outlander hybrid, Mitsubishi ensures that it is possible to supply the usual consumers of a house for ten days, excluding electric heating. So with a Tesla Model 3 75 kWh battery…

In Europe, we are not very sensitive to a backup unit that would rely on one or more electric cars. In the land of cherry trees, but also of very destructive typhoons and tsunamis, this architecture is beginning to spread.

Another place: last year, California was also the scene of recurring disasters that forced its inhabitants to make their daily lives even more secure. It would not be surprising if Tesla offers its own backup solution with its electric cars, which can also be used in areas without access to an electricity network.

What about battery wear?

Many critics of the use of electric vehicles in a V2x architecture fear the premature wear of batteries with this incessant discharge / recharge game. It must be recognized that we do not have enough perspective to estimate the phenomenon. Manufacturers at the forefront of these solutions claim that it is negligible, without providing verifiable figures.

It is undoubtedly this unknown who motivates them to regularly put forward a possible remuneration for the owners of the connected cars thus exploited. A windfall that would be more than enough to forget a shortened lifespan for the packs.

Before individuals accept to play the game, companies will have to lead by example. Where to find Tesla fleets? At taxis and VTC!


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