Today is a wonderful day. Due to the wonderful summer day in Wodonga, Victoria and the shining sun, the 6.5kW solar system is collecting 5kW of hard power limited by SolarEdge inverters (and limited by energy distributors).
This spill is a great opportunity to run the washing machine, turn on the dishwasher, and charge the electric car. The electricity used at home during these times is basically free.
Free power is usually considered when you are not paying after using solar power, as in most cases, but you get it through a feed-in tariff to feed back the power to the grid. Credit will be reduced. So it’s not a cost, it’s a lost opportunity.
Thanks to the latest solar inverters connected to the internet today, you can see and monitor this energy usage over the phone or the web.
In an ideal world, you can have a connected car, talk to a connected home, and start charging when power is released, as in the situation described above.
Cars like the Tesla Model 3 have a SIM card, but they also connect to your home WiFi (updates, etc.). If Tesla enables the API, developers can create an interface that connects to the solar system (SolarEdge already has an API). This will give you an idea of when you are free to power your car.
Currently, the only charging options in the car are “Scheduled Departure” and “Scheduled Charging”.
The first option of these options works by ensuring the required charge by a certain time, such as 7 am, getting ready for the morning commute, and charging during off-peak hours. This means coming home at 6pm and connecting the car, charging doesn’t start during these expensive afternoon / evening hours, but to charge at the lowest possible off-peak rate Can be configured to.
The second option is Scheduled Charging. This is a very basic time scheduler, with the option to select all days or only weekdays. Given the variety of sun behaviors, this doesn’t really work when trying to achieve the billing for the free scenario mentioned above.
Through the API, the car can communicate with the inverter to know that the maximum feed-in rate has been achieved while maintaining the excess power collected by the panel.
A 6.5kW system will not be 100% efficient, but at peak times of the day it is possible to get 6kW. That is, you can approach 1kW for free or choose the amount. Feed-in tariff that I’m willing to eat.
When charging, Model 3 charging consumes just under 2kW of energy. The rest of my house uses about 1kW per hour during the day, so there’s plenty of room to play.
From a standard 240v outlet, the car can add a range of 11km per hour. In other words, in just four hours, the car should have returned above an average usage of about 40km per day.
To achieve this level of flexibility, Tesla and other connected car manufacturers need to enable a charging API that integrates with solar inverters. Currently, the two big names in this area are SolarEdge and Fronius, both of which have existing APIs.
Of course, once the connected car begins to be open to third parties, the table has a lot of options. Imagine ordering food from a McDonald’s or KFC from a car display during an expedition. This may ask you to register your license plate, and when you arrive at the store there is no discussion of order numbers etc, you simply paid already through your Tesla account, you Just go through and collect food.
I would like to hear your thoughts in the comments below.
Connected Cars really need APIs to our Connected Homes to optimise EV charging Source link Connected Cars really need APIs to our Connected Homes to optimise EV charging