Update powerwall.sh

powerwall.sh

@@ -120,6 +120,7 @@ CHECKACV_SERVICE(){
 			echo "($datetime) normal voltage: ${INPUTACV}V"
 		else
 			echo "($datetime) LOW voltage: ${INPUTACV}V"
+			echo -e "($datetime) Power off or low voltage detected\nVOLTAGE: ${INPUTACV}V" | mail -s "POWER OFF!!" $email_alert
 		fi
 	    sleep 30
 	done # &