Document Enphase_envoy collar grid status issues

[catsmanac]

Proposed change

In HA version 2025.9 support for the Enphase Collar was added to the enphase_envoy integration. Collar support included display of grid_state as on/off grid. After some time of field use, it turns out the grid_state field of the envoy does not reflect the actual grid connection status, but rather the admin_state_str field of the Collar device does.

This PR is related to the fix for this in the parent code base and describes this issue, where to get the grid status and some caution with these status until time will learn more.

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logos and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: Get Enphase_envoy collar grid status from admin_state_str rather then from grid_state core#153766
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: fixes #

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

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[frenck]

Is this really the state we are communicating to the user? "ENCMN_MDE_ON_GRID"?

To me, this doesn't sounds like something we should ever make user-facing 🤷

[catsmanac]

You are completely right that this shouldn't show like this. Turns out I forgot to add these to the translations strings and those raw api values showed in the gui. As if I was before my first coffee or after my first beer, not realizing what was going on... . THANKS!!!

[c0ffeeca7]

Thank you, @catsmanac 👍