Control grid charging

[goodoldme]

I use a script to automate switching between self-consumption and time-based control modes using the following PyPowerwall endpoints -

/control/mode
/control/reserve

I noticed today that PW3 does starts exporting in time-based control mode right away only if grid charging is enabled. I keep grid charging disabled all the time but would like to switch it on/off when I want to export.

It would be great if there was an endpoint available to get/set grid charging.

[jasonacox]

This is available as a pypowerwall API (Cloud and FleetAPI mode).

field	mode	description
pw.set_grid_export(mode)	battery_ok, pv_only, and never	The desired behavior for grid exporting
pw.set_grid_charging(mode)	true or false	Allow charging from the grid *

I added this to proxy and have released a beta container to test if you are interested:

jasonacox/pypowerwall:0.14.1t82-beta1

If you are using the Dashboard, edit your powerwall.yml file and change the pypowerwall image to that and run ./compose-dash.sh up -d

• Note: The Tesla app mentions that grid charging may have tax implication or could be restricted in your area.

Ref: https://developer.tesla.com/docs/fleet-api/endpoints/energy#grid-import-export

[goodoldme]

I have tested grid charging and export. Both are working as expected.

I get the following json response on the POSTs, which seems sightly different from the ones from set_reserve and set_mode.
[{"response": ""}, false]

From PyPowerwall log

07/09/2025 11:04:22 AM [proxy] [INFO] Control Command: Set Grid Charging to true
07/09/2025 11:04:56 AM [proxy] [INFO] Control Command: Set Grid Charging to false
07/09/2025 11:06:56 AM [proxy] [INFO] Control Command: Set Grid Export to pv_only
07/09/2025 11:07:23 AM [proxy] [INFO] Control Command: Set Grid Export to battery_ok

[jasonacox]

[{"response": ""}, false]

That's the payload that comes back from the cloud call to Tesla. I'm using the same approach for the set_reserve and set_mode. However, since it isn't really useful information, let me know what you would like to see. We can hardcode a response for success vs error:

        if result is not None:
            message = '{"grid_charging": "Set Successfully"}'
        else:
            message = '{"error": "Failed to set grid_charging"}'

[goodoldme]

What you have suggested sounds good. It would be good to get a relevant response than what we get back from the cloud call.

[jasonacox]

Thanks! Code updated and now part of v0.14.2, and container image: jasonacox/pypowerwall:0.14.2t82

[goodoldme]

Awesome. Thanks!