AC300+B500K Grid Voltage Low issue

Hi @BLUETTI or @BLUETTI_CARE, I’m from Ukraine and experiencing frequent 058. (Grid Voltage Low) errors on my AC300 + B500K due to unstable grid voltage (often around 180-200V because of the current situation). Standard firmware and Grid Self-adaption don’t solve the problem as Grid Self-adaption just can’t be enabled. Could you please provide a custom firmware with adjusted lower voltage thresholds or suggets how should I charge my device?

Serial number AC3002313002115675
Communication BoardSN IoT2310001507839

IOT v9041.10
ARM v4037.07
DSP v4053.03
BMS v1084.05

Thank you for your support!