Excessive battery charging current

The Sunny Island battery inverter shows this condition when the external battery management system reports over SiCom that the battery charging current is too high. F927 and F928 are level 3 error messages, and W943 and W944 are level 1 warnings. F928 and W944 cover the case where the current is too high in charge mode. The manual's fix is to remove the cause in the external battery management system, following the battery manufacturer's documentation. Check the charging limits first. The maximum battery charging current is set by BatChrgCurMax, which should match the battery manufacturer's value. Charging current is also capped by GdCurNom and GnCurNom (nominal currents of the external energy sources) and by InvChrgCurMax (maximum AC charging current). If the battery current sensor was reinstalled, recalibrate it with BatCurAutoCal so the maximum charging current is calculated correctly. When reading sensor data, note that the measured battery current is negative while the battery is charging.

<!-- review notes

• sentence 4: support check: partial - The parameters and their limiting roles are stated, but nothing says to check charging limits first as a fix for these codes, and GdCurNom and GnCurNom are described as nominal currents of the external energy sources.
• sentence 4: review: partial - BatChrgCurMax, GdCurNom/GnCurNom and InvChrgCurMax and their limiting roles are stated, but the instruction to 'check the charging limits first' as the fix is not in the passages. -->