Zero export

[bckthomas]

Hi
With an ECU-C, there is an option named "zero export" to reduce the output power of the inverter to eliminate reverse power.
Is it possible to enable/disable this option with your integration ?

Thanks

[HAEdwin]

I don't own an ECU-C myself so I do have some questions.
Is this a setting you do once when installing the integration or something you would like to change dynamically?
Help me understand why you would want to change it dynamically.
What are the other options for Zero Export besides "Close"?

[jeroenleenarts]

You need CT Clamps in your utility cabinet connected to the ECU for this to work. Look for a thing called APSystems ECU-C CT-klem.

Since without CT Clamps you will always export 0 Watts, your inverters will never be limited to any production if no CT Clamps are present.

[HAEdwin]

Hi Jeroen, afaik the ECU-R-Pro has no inputs for CT-claps. Though I can imagine that you could feed the return to the grid from the P1 meter using Home Assistant but that's something for the R&D at APsystems to figure out. Sure there will definitely be a demand for it :)

[HAEdwin]

@bckthomas Have you had time to test by any chance?

[bckthomas]

@HAEdwin
Not this weekend, sorry
I can test on tuesday

[bckthomas]

Finally, I had time this morning and everything seems to work well. The switch changes the select value in the ECU-C :)

Here are the logs :
2025-03-16 08:45:51.185 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.gui_helpers] Response from ECU on bridging zero export to state open: Set Switch successfully 2025-03-16 08:46:42.245 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.gui_helpers] Response from ECU on bridging zero export to state close: Set Switch successfully 2025-03-16 08:47:01.967 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket successfully claimed 2025-03-16 08:47:02.513 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket resources released 2025-03-16 08:47:02.527 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket successfully claimed 2025-03-16 08:47:02.550 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket resources released 2025-03-16 08:47:02.550 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Inverter raw data: 415053313130313133303030323030303100042025031608450070300072761501303101f40076005f00e0006000e070300074109501303101f40076005f00df005c00df70300072719301303101f40073003700dd003600dd70300072718101303101f40074003500dc003600dc454e440a 2025-03-16 08:47:02.557 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket successfully claimed 2025-03-16 08:47:02.580 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Socket resources released 2025-03-16 08:47:02.581 DEBUG (MainThread) [custom_components.apsystems_ecu_reader.ecu_api] Signal raw data: 415053313130303436303033303030703000727615c1703000741095cd703000727193c0703000727181ca454e440a 2025-03-16 08:47:02.581 DEBUG (MainThread) [custom_components.apsystems_ecu_reader] Returning data: {'ecu_id': '215000029712', 'last_update': '2025-03-16 08:40:00', 'lifetime_energy': 6068.5, 'current_power': 594, 'qty_of_inverters': 4, 'today_energy': 0.4, 'qty_of_online_inverters': 4, 'timestamp': '2025-03-16 08:45:00', 'inverters': {'703000727615': {'uid': '703000727615', 'online': True, 'signal': -24, 'temperature': 18, 'frequency': 50.0, 'model': 'YC600/DS3 series', 'channel_qty': 2, 'power': [95, 96], 'voltage': [224]}, '703000741095': {'uid': '703000741095', 'online': True, 'signal': -19, 'temperature': 18, 'frequency': 50.0, 'model': 'YC600/DS3 series', 'channel_qty': 2, 'power': [95, 92], 'voltage': [223]}, '703000727193': {'uid': '703000727193', 'online': True, 'signal': -24, 'temperature': 15, 'frequency': 50.0, 'model': 'YC600/DS3 series', 'channel_qty': 2, 'power': [55, 54], 'voltage': [221]}, '703000727181': {'uid': '703000727181', 'online': True, 'signal': -20, 'temperature': 16, 'frequency': 50.0, 'model': 'YC600/DS3 series', 'channel_qty': 2, 'power': [53, 54], 'voltage': [220]}}, 'data_from_cache': False, 'data_from_cache_count': 0} 2025-03-16 08:47:02.581 DEBUG (MainThread) [custom_components.apsystems_ecu_reader] Finished fetching apsystems_ecu_reader data in 0.628 seconds (success: True)

[HAEdwin]

Thank you, I'll release v2.4.1 in a moment and close this discussion for now. If anything comes up again, I can reopen the discussion.

[bckthomas]

Thank you so much !

[HAEdwin]

You're welcome! - please do star the repository if you haven't allready