Excess Solar with Gen 1 Nissan Leaf

[hyke]

There’s an incompatibility with the Excess Solar functionality and my 2015 Nissan Leaf when the clouds pass over my panels.

The EVSE will stop providing power, and then the Leaf will go into an error state. The EVSE will then recognize an error state and start beeping. Then when the clouds move away, the EVSE will offer power but my Leaf can’t accept it because it’s still in an error state. After 6 minutes, the Leaf will finally give up and reset the charging state. Then the Leaf will accept power from the EVSE.

As a workaround, would it be possible to avoid the error state in the car by either leaving the EVSE on at 6 Amp when there is not enough sun (If the EVSE has been put into the On mode, and not in the Pause mode)?

Or another workaround is add an option to the EVSE where it will not beep when this particular Error is detected, and only have the LED indicator on the EVSE flash and the message in the App (to avoid the beeping for 6 minutes)?

[emporiacs]

Hi OP,

Thanks for the details here.

For Excess Solar Optimizer feature, the amperage cannot be limited to a minimum charge rate.

For the error on the car side, that would have to be managed on the car side. The charger will beep anytime it finds an error. When the car does not accept charge, it’s an error on the EV Charger side. That is intended to occur and not a malfunction of Excess Solar. The car should be able to accept charge as soon as there is solar consistently available for at least one minute detected by the 200A CTs. (Remember, the 200A CTs need to see at least 1500W for one minute consistently to turn on Excess Solar.) So, if the car locks out the ability to accept charger, there’s no way for the charger to identify this so it just sees a situation where power is not being transferred, the car is not accepting charge, and thus the fault alarm.

Are you, by chance, overriding the Excess Solar feature? When you override excess solar what happens? You will have to wait two hours until you can use the feature again.

If you contact us directly, we’ll be happy to troubleshoot further with you in more detail specific to your situation. (Please just link to this thread when you do.)

We also recommend that you contact your Nissan dealer to have them help you with this from the perspective of the car. Remember, that ultimately the car is charge.

We’ve passed along your feedback to the team as well!

[Author]

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