Tesla opens bidirectional loading - hardware already installed

Posted by Christian Pfäffli on

Applications and electric cars for Vehicle-to-Grid (V2G) are not yet available to the end customer. But there are already projects that want to make bidirectional charging even easier. In addition to corresponding test projects by Nissan or VW, for example, there seems to be no series solution on the market at least. This could change in the near future. Because as the industry portal electrek.co has now learned from an electrical engineer who was involved in the "teardown" of a Model 3 for a competitor, both the Model 3 and the Model Y should be prepared for bidirectional charging.

This technology could become necessary, as it can be assumed that the increase in electric vehicles on the road will increase the demand for electricity. The possibility of actively integrating electric cars into the power grid, for example, to cushion electricity demand peaks, could be part of the solution. Only in mid-March, chief strategist Michael Jost announced that the batteries of electric cars can be used to stabilize the energy grid. To this end, the batteries should be charged during periods of oversupply and the electricity should be sold back to the grid at times when the supply of electricity from wind and solar power is low.

In Tesla's past, both Tesla CEO Elon Musk and co-founder and former CTO JB Straubel had expressed concerns about integrating the possibility of bi-directional charging into Tesla vehicles. The main reason for this was the danger of accelerated battery ageing. In addition, the number of Tesla vehicles at that time was too small to make a difference in the power grid. In the meantime, however, a number of vehicles are being developed which could make a difference.

In 2018, Musk already seemed to be turning around a bit and explained that Tesla could "rethink" Vehicle-to-Grid technology. The electrical engineer who was in charge of disassembling the Model 3 was able to find out that the built-in charger already allowed bidirectional charging. His statement to electrek was as follows: "What I learned when disassembling the Model 3 charger is that the design is completely bi-directional. This means that electricity can be converted from alternating current to direct current in the same way as in the previous example, but also that current can flow in the opposite direction, coming from the battery and ending up on the alternating current side. This is called a DC/AC inverter, and when this technology is present in a vehicle, it is called V2G (Vehicle to Grid)."

The electrical engineer is confident that the bidirectional charging capability of both the Tesla Model Y and Tesla Model 3 could be made possible by an over-the-air software update. This would be a further, important step forward for e-mobility if all Tesla Model 3 / Model Y were to be given the ability to charge bi-directionally at once. We are eagerly awaiting further developments from Tesla.

Source: electrek.co - Tesla quietly adds bidirectional charging capability for game-changing new features


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