Time of Day EV charge rate setting

[paulH]

I have solar with batteries. Great right? Unfortunately the Vue2 is not able to differentiate between extra PV power and the battery sources power after the “excess solar” detection is started. (Without batteries “excess solar” works super well).

For the EV charger, I suggest that there be a time of day power limit setting added to the “excess solar” and “schedule” settings so the batteries are not drained fully during the day. Then at night or off peak, the charge rate can be adjusted to reflect that session. This would replace the general power slider in the app.

 

Thanks!

 

 

[emporiacs]

This is something we certainly want to have integrated in our system, we hope to have it in the future.

[Robaroni]

My EV isn’t on my critical load sub panel.

What happens is that excess PV is sent to the grid, when the Emporia senses PV selling (two bidirectional CT’s on the main breaker) it charges my EV. The excess PV generation shows up on my app as “balance” because I only monitor individual breakers on the sub panel not the main breaker from my inverter, which the Emporia can’t do if you have CT’s on the breakers in that panel because they would conflict with the sub main breaker.

As a note, there are no CT’s on the sub main breaker as Emporia breaker CT’s aren’t directional yet, although I see resistors on the CT’s for phase detection so I expect this will be a future firmware update.

So basically you might try putting your EV breaker on the main panel that isn’t supplied by the PV with a CT on it.

[emporiacs]

There is no solution right now for this scenario. This will be resolved when the 50A CTs are bi-directional or until we launch  custom settings for Excess Solar. There is no ETA for those features at present.

[paulH]

Thanks for the suggestion.  As it is, I don’t have a sub panel – I have whole-house coverage ( the main panel is supplied by the inverters which are fed by PV, batteries & grid).

I just started putting together a Home Assistant setup that might be able to at least alert me if my batteries are draining too much, if Emporia exposes their API. Its a fun project!

[emporiacs]

Emporia Energy does not offer an API and at this time our 50A CTs are not bi-directional. Because of that limitation, if you want to monitor the charging and discharging of the battery you need a dedicated Gen 2 and use only the 200A CTs. Otherwise, we recommend not monitoring the battery at this time.

More information:

https://help.emporiaenergy.com/hc/en-us/articles/18530659344407-CT-Sensors-Bi-directional-current-detection

https://help.emporiaenergy.com/hc/en-us/articles/9612779482135-Is-an-API-available

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