Deprecated: html_entity_decode(): Passing null to parameter #1 ($string) of type string is deprecated in /usr/www/users/mymitfgdwf/wp-content/plugins/ultimate-faqs/includes/template-functions.php on line 354

The Undervoltage warning of the inverter is judged based on the voltage of the main circuit as follows.
Power failure only at the main circuit:

Output an Undervoltage warning power failure only at the control circuit.

Not output an Undervoltage warning when the control circuit is turned ON while the main circuit is OFF, an Undervoltage warning is not output.