Q. I have an electric car (Tesla 70D), and a 5kw Fronius Symo inverter with 6kw of panels (3 year old solar system).
Rather than have my excess power generation go back to the grid at approx 7c / kwh I'd rather put it in my car.
The simplest way to do this would be if I used the 'slow' trickle charger for the car which runs off any normal 240v/10amp socket (ie normal house power point). The charger would draw approx 2-2.4kw of power. Not sure if it would run on less???
I can manually do this to a certain extent - ie plug my car in at times of high generation but it is just too much hassle to constantly monitor it. eg If clouds roll in and production drops or household consumption jumps up, I would want charging to stop otherwise I would be charging the car at 25c rather than 13c overnight off peak tariff - thus defeating the purpose. It would need to switch on/off automatically depending how much excess solar generation is available.
Do you know of any devices that can control where your excess energy goes or if the fronius inverter can be wired to do this? I'd love to know if there are any options.
Rather than have my excess power generation go back to the grid at approx 7c / kwh I'd rather put it in my car.
The simplest way to do this would be if I used the 'slow' trickle charger for the car which runs off any normal 240v/10amp socket (ie normal house power point). The charger would draw approx 2-2.4kw of power. Not sure if it would run on less???
I can manually do this to a certain extent - ie plug my car in at times of high generation but it is just too much hassle to constantly monitor it. eg If clouds roll in and production drops or household consumption jumps up, I would want charging to stop otherwise I would be charging the car at 25c rather than 13c overnight off peak tariff - thus defeating the purpose. It would need to switch on/off automatically depending how much excess solar generation is available.
Do you know of any devices that can control where your excess energy goes or if the fronius inverter can be wired to do this? I'd love to know if there are any options.
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A. Yes - you can use the Fronius smart meter and relay to switch on your charger when there is more than 2kW being exported.
Ronald describes how it works for hot water here - but it should achieve the same outcome if wired into your charger:
https://www.solarquotes.com.au/blog/using-fronius-inverter-smart-meter-relay-make-solar-electric-hot-water/
A. Yes - you can use the Fronius smart meter and relay to switch on your charger when there is more than 2kW being exported.
Ronald describes how it works for hot water here - but it should achieve the same outcome if wired into your charger:
https://www.solarquotes.com.au/blog/using-fronius-inverter-smart-meter-relay-make-solar-electric-hot-water/
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