ToU Scheduler Card (100% AI made). You are welcome!

[Fettkeewl]

I had a need, I had no javascript knowledge .... i had AI
and we made this beauty through alot of iterrations :)
Since I believe sharing is caring your welcome to use and modify as you wish.
Other than browsing GIT I don't know how to use it properly as a programmer so the javascript module
is here. Add it to your www folder and path it upp as a dashboard resource.
tou-schedule-card.js

Edit:
Made a couple of changes/Improvements to the UI in regards to the pop-ups aswell as row validation.
tou-schedule-card v2.js

You will need an input_text to hold your ToU schedule in Home Assistant
And you will need to provide your "Batteries" entity.
The card itself will look for an appropriate sensor containing ToU periods and if found you will be able
to act upon it with read/write from HA(to/from your input_text)

Before you can write to the inverter you need to save the schedule to your input_text.
Reading from inverter will update your input_text

Add Card

Card setup

Screenshot featuring the card itself with applicable warnings where errors are found

Tooltip explaining icons

Anti spam block on write

Enjoy!

[sotatech]

Thanks for this card! I was looking for some way to easily check my ToU settings at a glance. Perfect!

[Fettkeewl]

No probs, I was scouring the net aswell..!
It does seem to bork on phone sometimes so I have to taskkill the app before it works again, I plan to take it to AI for a fix :D but just so you know. On PC it has been running without issues

[sotatech]

I've run into a limitation I hope you can help me with. I need to use 5 ToU periods, but I can only seem to use 4. This is my current schedule:

The cheap rate for battery charging starts at 23:00 and ends at 08:00. I can't add that time as it appears to overlap itself. However, if I change the last row to 19:00 to 23:00 and then add a fifth row from 23:00 to 23:59, it disappears. Any ideas?

Thanks!

[Fettkeewl]

I've run into a limitation

Hey mate,
There is no limited imposed by the script, most likely it's your input_text that has default 100 characters limit.
Maximum is 255 so go to your input_text, hit the advanced settings and edit the maximum limit.

[sotatech]

Well, if I had checked the logs the problem would have been obvious! Thanks for your help.

[Fettkeewl]

Well, if I had checked the logs the problem would have been obvious! Thanks for your help.

Hope you can try the v2 i added to the main post.
I forgot that Fusion Solar does not allow overlappning minutes from your example.
So 00:01-00:02 and 00:02-00:03 should not be allowed.
00:01-00:02 means the full window up to including 00:01:00-00:02:59 ...

[sotatech]

Yes, that new version has worked fine. Strangely, the previous schedule with the overlapping minutes seemed to be working OK as the batteries were charged at the scheduled time.
Thanks again.

[JFHCFC]

works great !

in /homeassistant/configuration.yaml

input_text:
tou_schedule:
name: "Time of Use Schedule"
initial: "08:00-12:00, 14:00-18:00"

[JFHCFC]

How do I change the time on my inverter?
The integration works correctly with winter time. We're currently in summer time.

[JFHCFC]

Added read time from inverter

Reading (and synchronizing) the inverter time

service.py from:
#1391

tou-schedule-card.v3.js

[JFHCFC]

Add ToU Card to new version of huawei_solar

[sotatech]

I've updated the card to v3 and I can see the new Inverter date and time section, but it just says "Not read yet". I don't see an action to synchronise the clock. I'm running Huawei Solar 2.1.5.

[JFHCFC]

To get v3 working (with time sync), you need to edit 4 files:
const.py
sensor.py
services.py
services.yaml

Here is my services.py:

#1391

I have version 2.1.1 of huawei_solar installed; installing a newer version overwrites the files and removes the time synchronization.

I am testing (with ChatGPT) the migration from 2.1.1 to 2.1.5 while preserving ToU v3 and time synchronization.

Despite having the Pro version, I’ve run out of tokens and am waiting for them to renew.
I think I’ll be able to post more information in a few days.

P.S.
For now, I can share the differences (or files) between these 4 files and the original 2.1.1 versions.

[sotatech]

OK, sorry for jumping the gun on this. I had the impression that it was already merged. I'll wait for your update.
Thanks!

[JFHCFC]

I am attaching version

huawei_solar_2.1.5_english_public.zip

works with

Core 2026.9.4
Supervisor 2026.09.2
Operating System 18.3
Interface 20260826.7

English languae (I also have it in Polish)

in zip is readme.md

Features

• Official Huawei Solar 2.1.5 code with custom inverter/battery polling intervals of
  15 seconds and meter polling of 20 seconds.
• Direct ToU schedule readback (huawei_solar.get_tou_periods).
• SUN2000 clock read and explicit synchronization with readback verification.
• ToU card: helper save verification, validation, explicit Write confirmation and direct device readback after Write.
• Corrected card does not reject a valid response because HA and browser clocks differ.

How I did it:

I connected to Home Assistant using WinSCP:
Protocol: SFTP
User: root
Password: from the Advanced SSH & Web Terminal application

copy
/homeassistant/custom_components/huawei_solar
to /homeassistant

in shell Advanced SSH & Web Terminal
ha core stop

in winscp
delete all files from folder /homeassistant/custom_components/huawei_solar
upload (from pc) content ha_config.zip\ha_config\custom_components\huawei_solar

in shell Advanced SSH & Web Terminal
ha core start

in ha (www) /config/lovelace/resources i've got =10
/local/community/tou-schedule-card/tou-schedule-card.v2.js?v=10

After modifying the file, you need to increment the number by 1; for me, it's version 10.

[JFHCFC]

Package backing up 'tou' and 'sync' during an update (e.g., 2.1.6)

I'll test it after the 2.1.6 release.

from readme

"An independent maintenance tool for preserving local changes to the Huawei Solar
custom integration and its optional ToU Scheduler card across upstream upgrades.
It is not an official Huawei, Home Assistant, HACS or wlcrs release.

Guard saves immutable snapshots, compares three versions (upstream baseline,
your custom installation and target upstream), and prepares a separate merged candidate.
Only reapply, restore and recover replace installation files.
Guard does not connect to an inverter, change its schedule or clock, or restart HA.

Guard does not block updates in HACS. Disable automatic updates for this integration.
Make and download a full Home Assistant backup before upgrading. Guard snapshots
cover integration and card files, not helpers, the HA database or installed dependencies.

The English edition passes 31 fixture-based tests covering merging, conflicts,
integrity checks, rollback and recovery. The preceding implementation also passed
full migration/restore simulations for two custom 2.1.5 variants. Those tests used
a simulated 2.1.6 target, not the actual upstream release. No physical HA or inverter
test is claimed. See VALIDATION.json for the scope of validation.

Advanced usage: check VERSION --upstream-dir DIRECTORY accepts an explicitly
selected local upstream tree. Its manifest must match. A cached version cannot
silently be replaced with different source content. backup LABEL creates an
additional snapshot without changing the default protected snapshot."

Huawei_Solar_Guard_v2_README_EN.md
huawei_solar_guard_bundle_v2_en.tar.gz

[JFHCFC]

Huawei Solar clock fix: DST synchronization after CEST/CET changes

The dst-r3 patch fixes Sync HA time in the custom Huawei Solar 2.1.5.post1 and 2.1.5.post2 editions that include the ToU Scheduler services. This is a community patch for those custom editions. It is not a general patch for every upstream Huawei Solar version.

What caused the error?

The previous validator treated the inverter's Daylight saving time enable switch as a permanent extra hour. On devices configured with seasonal DST rules, the switch can remain enabled throughout the year. After Home Assistant switched from CEST (UTC+2) to CET (UTC+1), synchronization could fail with:

The inverter time zone/DST offset differs from Home Assistant.

The corrected validator uses the current seasonal adjustment from Home Assistant's configured time zone when checking the inverter's base zone. With DST disabled, the configured zone must match HA's current offset.

The patch preserves clock readback verification and checks for invalid zones, login errors and uncertain writes. It does not change the inverter's DST switch, transition dates, time zone, ToU schedule or clock source. No ToU card JavaScript update is required.

Before installing

1. Make and download a full Home Assistant backup.

2. Confirm that you are using one of the custom 2.1.5 editions listed above.

3. Check the existing file in your HA terminal:

   sha256sum /config/custom_components/huawei_solar/custom_services.py
   
   

huawei_solar_2.1.5_clock_dst_r3.zip