FoxESS Community - Owners & Installers Forum

System Details:

Inverter: H1-3.0-E-G2 (Firmware: Master V1.53 / Manager V1.39)

EV-Charger: A7300P1-E-2-WO (Firmware: V1.20)

Datalogger: WL-H1-WL (Firmware: V2.09)

Setup: Smart Power Meter installed (replacing previous CT clamp) for dynamic load balancing.

Description of the Problem:
Before the recent firmware updates, my system was working perfectly. Using the "Green Mode" (Solar Linkage), the EV charging rate was correctly limited to the available PV production, ensuring a 100% solar charge.

However, after updating to Master V1.53 and Wallbox V1.20, I am experiencing a significant regression:

When charging starts in Green Mode, it initially respects the PV production.

After a few minutes, the charging power begins to ramp up significantly, often exceeding the available PV production by more than double (pulling the remainder from the Grid).

Even with Load Balancing active, the EV charger seems to ignore the "Solar Only" priority that was previously stable.

It appears that the new firmware has altered the communication priority between the Inverter's meter readings and the Wallbox's Green Mode logic. Instead of modulating based on PV excess, it seems to be defaulting to a higher charging rate after the initial handshake.

Question:
Is anyone else experiencing this behavior with V1.20? Is there a specific setting in the new Manager V1.39 or Wallbox V1.20 that needs to be toggled to restore the strict "Green Mode" priority?

An update on this: I noticed that after the firmware upgrade, a new parameter called 'Power Limit' appeared in the Solar Tie-in / Green Mode settings.

Does anyone have experience with how this specific parameter behaves in the new firmware?

From what I understand, it might be acting as a grid threshold to allow the charger to maintain the minimum EV charging current (6A) when solar generation drops. However, it seems that with the default settings after the update, it is causing the Wallbox to completely ignore the PV surplus and pull massive amounts of power from the grid instead of modulating down.

In my case, the parameter Power Limit contains the value: 50W.

If you are using this new firmware combo, what value do you have set for 'Power Limit' to keep Green Mode working strictly with solar surplus? Should I drop it to 0kW or the minimum allowed?

Thanks!