Intermittent failures setting Solaredge I1 Site Limit after setting Solaredge I1 Limit Control Mode option

[dbaarda]

Describe the bug

When trying to turn on Solar Export Limiting in automations by setting "Limit Control Mode" to "Export Control (Export/Import Meter)" and "Site Limit" to 100, sometimes the site limit doesn't get set. When this happens the "device info Control" block shows the Site Limit as set to 0, and this is reflected in the history graphs, but the inverter output is not throttled. This only happens when "Limit Control Mode" is switched from "Disabled".

I notice in traces that when this happens the site limit change appears to be executed before the "Limit Control Mode" is reported to be changed. Note that the "Site Limit" is unavailable when "Limit Control Mode" is "Disabled". I suspect that setting the site limit fails because that setting is not yet available. It also is not actually set to zero but "unset" when this happens, because the inverter doesn't throttle the output like it does when the limit is explicitly set to zero.

Note that this doesn't always happen and seems to be some kind of race-condition. I've tried increasing "Inverter Command Delay" up to 20 but that didn't seem to change anything except maybe make it worse. Turning "Keep Modbus Connection Open" on seemed to help a bit, but it still occasionally happens.

Right now my workaround is to check if "Limit Control Mode" is still unchanged after setting it and then trigger-wait until it changes before trying to set "Site Limit".

Expected behavior

Setting "Site Limit" after setting "Limit Control Mode" to modes where "Site Limit" is available should always work without requiring explicit state-change checking.

Screenshots

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Diagnostic File

config_entry-solaredge_modbus_multi-01J92KVQY0GFNE7NKFZ66A6SDX.json

Debug logs

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Home Assistant Version

2024.9.1

solaredge-modbus-multi Version

3.0.0

Installation Type

Core

Read the Instructions

• My configuration follows https://github.com/WillCodeForCats/solaredge-modbus-multi/wiki/Configuration
• I have read the Known Issues https://github.com/WillCodeForCats/solaredge-modbus-multi/wiki/Known-Issues
• This issue is not about a template error (do not report template errors, read https://github.com/WillCodeForCats/solaredge-modbus-multi/wiki/Template-Design-Notes)

Additional Context

No response