Differences

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--- ac_coupling:fronius [2025-05-26 10:31] – iburger
+++ ac_coupling:fronius [2025-08-01 08:57] (current) – [1.5 Known frequency exceptions] iburger
@@ Line 63: / Line 63: @@
       - [[ess:design-installation-manual|ESS Assistant]]
       - PV Inverter support
-  - Carefully review the settings in the Assistant, as this was changed in later Fronius firmware versions. See tables below. \\ {{:ac_coupling:ess_frequency_settings.png?nolink&}} \\
+  - It is not necessary to change the default settings in the Assistant, but please see exceptions below. \\ {{:ac_coupling:ess_frequency_settings.png?nolink&}} \\
   - Complete the rest of the Assistant and write the new settings to the MultiPlus or Quattro.
 \\
-Suggested suggested settings for frequency (Fronius firmware before fro35020)
+Table with general suggested settings for 50Hz and 60Hz frequency
 | ** State ** | ** 50Hz ** | ** 60Hz ** |. |
 | Start| 50.2 | 60.2|Hz|
 | Minimum| 52.7 | 62.7|Hz|
 | Disconnect| 53.0 | 63.0|Hz| \\
-Suggested suggested settings for frequency (Fronius firmware after fro35020)
-| ** State ** | ** 50Hz ** | ** 60Hz ** |. |
-| Start| 50.2 | 60.2|Hz|
-| Minimum| 53.1 | 63.1|Hz|
-| Disconnect| 53.5 | 63.5|Hz| \\
 Note that although the MG50 for instance has a higher start frequency of 51Hz, there is no real drawback using the proposed value of 50.2Hz. The system will just increase the frequency until the PV inverter regulation kicks in. The value of 50.2Hz will work with a broader range of PV inverters/grid codes.
@@ Line 84: / Line 77: @@
 More information on adding Assistants is [[assistants:how_to_add_and_configure_an_assistant|here]].
+===== 1.5 Known frequency exceptions =====
+  * Fronius bundles between fro35020 and fro36120 (at time of writing) contains a change that holds the inverter relay closed up to 53Hz for grid code MG50, or 63Hz for MG60. This sometimes causes problems when reconnecting to the grid. Please set the Disconnect frequency to 53.1Hz/63.1Hz for these versions. Consult the Fronius [[https://www.fronius.com/en/~/downloads/Solar%20Energy/Firmware/SE_FW_Changelog_New_Fronius_Galvo_Symo_Primo_Eco_DE-EN.pdf|changelog]] when in doubt.
 ====== 2. GX Devices & Fronius PV Inverters ======