Vehicle to Grid, what is it and how does it work?? In it’s simplest form V2G is a system of bi-directional charging for EV’s connected to the electricity network via their charger. The charger not only provides flow of energy from the grid to the vehicle to charge the EV batteries, it also allows that same power to be drawn back from the vehicle into the home (V2H) and or the electricity network (V2G).
The revolutionary idea of using the vehicle’s battery as a back-up power source came during the aftermath of Japan’s 2011 Tōhoku-Oki earthquake. Many homes were left without power and EV batteries were enlisted as a source. Today, 4,000-5,000 Leaf-to-grid installations are active in Japan.
To date the Nissan Leaf is the only EV that offers the technology and with the launch of the generation II Nissan Leaf into Australia this is set to be available (once final approval is granted by regulators) sometime in 2020 to Australian consumers.
The ramifications of this are huge and ten fold. At a household level this means the idea of a car as we know it completely shifts. The car becomes not only a method of transport but also a source of energy for your home of an evening. Coupled with solar PV this brings houses closer to being self reliant for their energy needs. Another benefit of the technology is it has huge potential to counter the '“duck curve” of excess energy generation during the middle of the day from solar PV by harnessing and storing this energy in EV batteries, then drawing back this same energy of an evening. Therefore, rather than being seen as an extra demand on the electricity network, EV’s could actually benefit it, by allowing excess energy to be stored then used at a time when renewables aren’t available.
V2H/V2G is an extremely exiting development, I feel it has real potential and as such Evolve Electrical will be trialing the technology in our own home. Stay tuned for more updates!