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Is there a way to start charging based on my solar panels outputting energy?

goldsmin

Member
Jun 25, 2020
6
1
Temecula CA
Hi, not sure if this is in the right forum. I wondering if there is a way to have my Tesla start charging when my solar panels are outputting enough energy. Maybe something like IFTTT app?
I have Enphase Energy micro inverters and I can easily tell when they are generating enough power to not pull power from the grid to charge. I obviously don't charge at night, but sometimes it's cloudy for instance. In that case I would rather wait to charge during a time when all power can come from the panels.
I had solar panels up long before I got my Tesla. I would generate enough energy to power my house without any charges from the grid. Once I got the Tesla, I noticed that my electric charges had gone way up. However, by carefully selecting my charging time, I have significantly reduced my electric bill. I'm hoping to automate this scheduling.

Any ideas?

Thanks,
neal
 
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Ampre Sand

Member
Nov 18, 2016
58
30
Seattle
We use an OpenEVSE to charge our Model 3. It has an optional network interface, and if you are skilled with some light programming/scripting, you can send it commands that reduce the “advertised amperage” or simply enable/disable charging. In our testing, the Tesla responds immediately by adjusting its power draw accordingly. All J-1772 compliant cars are required to support this ability.

We use this feature to avoid high demand charges from our utility. If the electric water heater comes on, or other high power consumers that are monitored, our home automation system sends API commands to the OpenEVSE to adjust available amperage accordingly.

If we didn’t have 100% net metering on our solar, we’d also limit charging to follow panel output.

Does your EVSE have an API?
 
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philip295

Member
Jul 29, 2019
28
5
UK
Does it reduce pollution or cost to feed the grid during the day when there's high demand and charge the car late at night when the grid has low cost wind energy sources?
I don't know the answers to that. I have a simpler ev charger. I just remembered hearing about Zappi
 

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