XW inverters Fault F29/F30 - is it for AC1 or AC2?

pcguy2u

An over voltage condition that is described as:

F29 (Over-voltage anti-islanding fault, caught by the qualification limit, voltage difference between L1 and L2) most every time and F30 (Over-voltage anti-islanding, fast disconnect, 270 V) at other times.

Anyone have any idea?  Trying to implement an invert on demand setup (more later) and this is the stumbling block at the moment.  No amount of searching provides insight.  :0(

There is conflicting information, some of which suggests that it could be the batteries:

Potential Causes for Fault F29

• Battery Charger Settings: The battery charge voltage settings (e.g., Bulk, Absorption, or Equalize) are set too high for the battery bank.
• Faulty Battery Bank/BMS: If using Lithium batteries, the Battery Management System (BMS) may have disconnected, causing a voltage spike.
• Incorrect Battery Type Setting: The inverter is configured for a battery type that requires higher voltage than what is actually installed.

Battery settings were derived via support from Discovery Energy Systems.

TIA, Nick