A Home Assistant custom integration that automatically syncs live Amber Electric electricity prices to your Sigenergy battery system via Sigen Cloud.
Don't hate me, but Claude Code had a lot to do with this codebase, it even made the icon...
Amber Electric provides real-time wholesale electricity prices that change every 30 minutes. Sigenergy's mySigen app supports dynamic tariffs but does not natively integrate with Amber Electric in Australia.
This integration bridges that gap — reading live Amber prices already available in Home Assistant and pushing them directly to Sigen Cloud, so your battery system always knows the current buy and sell prices without any additional Amber API calls.
- Listens for confirmed (non-estimate) Amber price updates on your existing Home Assistant Amber Express Electric sensors
- Reads the current buy and sell prices directly from HA sensor state
- Authenticates with Sigen Cloud using your credentials (See below for details on how to get those)
- POSTs the updated single-rate tariff to Sigen Cloud every time the price changes (approximately every 30 minutes)
- Your Sigenergy system immediately sees the updated tariff and can optimise accordingly
No additional Amber API calls are made — the integration reuses price data already fetched by your existing Amber Electric HA integration, to avoid hitting API limits.
- Home Assistant 2024.1 or later
- Amber Express custom integration installed and configured
- Sigenergy battery system with cloud access
- A Sigen Cloud account (same credentials as the mySigen app)
- The following values captured from your browser devtools (see below):
- Sigen encoded password
- Sigen device ID
- Sigen station ID
- Open HACS in Home Assistant
- Click Custom Repositories
- Add
https://github.com/xitation/amber_sigen_syncas an Integration - Search for Amber to Sigen Sync and install
- Restart Home Assistant
- Copy the
custom_components/amber_sigen_sync/folder to your HA/config/custom_components/directory - Restart Home Assistant
Go to Settings → Devices & Services → Add Integration and search for Amber to Sigen Sync.
| Field | Description |
|---|---|
| Sigen username | Your mySigen login email address |
| Sigen encoded password | AES-encoded password captured from browser devtools MUST be URL Encoded |
| Sigen device ID | 13-digit userDeviceId captured from browser devtools |
| Station ID | Your Sigen controller's numeric station ID |
| Field | Default | Description |
|---|---|---|
| General price sensor | sensor.amber_express_home_general_price_detailed |
Amber import price sensor entity ID |
| Feed-in price sensor | sensor.amber_express_home_feed_in_price_detailed |
Amber export/FiT price sensor entity ID |
| Plan name | Amber Live |
Label shown in mySigen app for the tariff plan |
These are captured from your browser's developer tools:
- Open Chrome or Brave and go to
https://app-aus.sigencloud.com/ - Press F12 to open DevTools → click the Network tab
- Tick Preserve log and set filter to Fetch/XHR
- Log in with your normal mySigen credentials
- Find the POST request to (note in other regions the url will change)
api-aus.sigencloud.com/auth/oauth/token - Click it → go to the Payload tab → click view source
- Copy the
passwordvalue — this is your Sigen encoded password - Copy the
userDeviceIdvalue — this is your Sigen device ID
Important: The encoded password is not your plain text password. It is an AES-128-CBC encrypted value that the mySigen web portal generates automatically. Copy it exactly as shown in the URL encoded network request.
The easiest way to find your station ID (This didn't work for me, may work for you):
- Open the mySigen app → tap the SigenAI chat assistant
- Type: "Tell me my StationID"
- It will reply with your numeric station ID
Alternatively, capture it from a HAR:
- In the same DevTools session, navigate to your tariff/electricity settings
- Make any change and click Save
- Find the POST to
api-aus.sigencloud.com/device/stationelecsetprice/save - Look for
"stationId"in the request payload
The integration creates a sensor sensor.amber_sigen_tariff_sync showing
the current sync status:
| State | Meaning |
|---|---|
never_run |
Integration loaded but sync not yet triggered |
ok |
Last sync succeeded |
error |
Last sync failed — check last_error attribute |
| Attribute | Description |
|---|---|
last_sync |
ISO timestamp of last successful sync |
last_error |
Error message from last failed sync |
To trigger an immediate sync regardless of price update timing, use the force_sync action in Developer Tools → Actions:
action: amber_sigen_sync.force_syncOnce the integration is running and a sync has completed, open the mySigen app and navigate to your electricity bill / tariff settings. You should see:
- Utility Company: Amber Electric
- Rate Plan Name: Amber Live (or your configured plan name)
- Rate Plan Type: Single Rate Tariff
- Rate Tariff: Current Amber spot price in cents
- Currency Unit: Cent
The rate tariff value will update automatically every 30 minutes as Amber publishes confirmed prices.
The integration only syncs on confirmed prices, not estimates. Amber
Express holds the previous price until a confirmed price arrives (typically
within seconds of each 30-minute interval). If you need to test immediately,
use the force_sync action.
- Verify your encoded password was copied from the view source (raw) view in DevTools, it must be URL encoded, not the decoded view
- Ensure
scope=serveris included — it is handled automatically by the integration - Re-capture the encoded password from DevTools as it may have been truncated during copy
- Check
sensor.amber_sigen_tariff_syncstate andlast_errorattribute - Run
force_syncand check Settings → Logs filtered byamber_sigen - Verify your station ID is correct
Ensure you did a full restart of Home Assistant, not just a reload. Service registration requires a full restart.
- This integration uses an unofficial, reverse-engineered Sigen Cloud API. Sigenergy may change their API at any time without notice, which could break this integration.
- The encoded password is stored in your HA config entry. Ensure your HA instance is properly secured.
- Bearer tokens are fetched fresh on every sync and are not stored persistently.
- Prices are synced as a single flat rate (the current spot price), not as a 48-slot TOU schedule. The Sigenergy EMS uses this as the reference price for charge/discharge decisions.
This integration is not affiliated with, endorsed by, or supported by Amber Electric or Sigenergy. Use at your own risk. The developers are not responsible for any damages or issues arising from the use of this software.
Issues and pull requests are welcome at github.com/xitation/amber_sigen_sync.
This project is licensed under the
GNU General Public License v3.0.
Free to use, modify and distribute. Derivative works must also be open source
under GPL-3.0.