2026.6.4
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Update time segment

The Update time segment action configures one of the nine time segments on a supported MIN inverter. Each segment combines a battery operation mode, a time range, and an enabled state, so you can automate when your battery charges, discharges, or prioritizes your home loads.

Important

This action changes your inverter’s time-of-use scheduling. Incorrect settings can affect how your battery charges and discharges and what your energy costs are. Make sure you understand your electricity tariff before you make changes.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To update a time segment from an automation or a script:

  1. Go to Settings > Automations & scenes.
  2. Open an existing automation or script, or select Create automation > Create new automation.
  3. If you’re setting up a new automation, add a trigger in the When section. Scripts don’t need a trigger. They run when something else calls them.
  4. In the Then do section, select Add action.
  5. From the search box, search for and select Growatt: Update time segment.
  6. Choose the Device, then set the segment values you want.
  7. Select Save.

This action does not support targets. In the UI, you are not prompted to choose an area, device, entity, or label.

Options in the UI

Device (Required)

The Growatt MIN inverter to update.
Segment ID (Required)

The time segment to configure (1 to 9).
Battery mode (Required)

The energy priority mode for this segment. One of load_first (power your home from solar or battery first), battery_first (charge the battery from solar or grid first), or grid_first (export to the grid first, discharging the battery if needed).
Start time (Required)

The start time for the segment, in HH:MM format.
End time (Required)

The end time for the segment, in HH:MM format.
Enabled (Required)

Whether this time segment is active.

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as growatt_server.update_time_segment. A basic example looks like this:

ActionActions are used in several places in Home Assistant. As part of a script or automation, actions define what is going to happen once a trigger is activated. In scripts, an action is called *sequence*. [Learn more] 
action: growatt_server.update_time_segment
data:
  device_id: a1b2c3d4e5f6
  segment_id: 1
  batt_mode: battery_first
  start_time: "00:00"
  end_time: "06:00"
  enabled: true

This charges the battery between midnight and 6 AM using the first time segment.

Options in YAML

device_id string Required

The Growatt MIN inverter to update.

segment_id integer Required

The time segment to configure (1 to 9).

batt_mode string Required

The energy priority mode for this segment. One of load_first (power your home from solar or battery first), battery_first (charge the battery from solar or grid first), or grid_first (export to the grid first, discharging the battery if needed).

start_time time Required

The start time for the segment, in HH:MM format.

end_time time Required

The end time for the segment, in HH:MM format.

enabled boolean Required

Whether this time segment is active.

Good to know

The battery mode controls when and why discharging happens. The actual discharge rate is controlled by the Discharge power number entity (0 to 100%).

Try it yourself

Ready to test this? Open Developer tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.

Tip

AI assistants like ChatGPT or Claude can also explain actions or suggest the right one when you describe what you want in plain language.

Related actions

These actions work well alongside this one: