ntS function Anern Hybrid Inverter

[dtvking]

Hi Everyone
I've just purchased an Anern Hybrid Inverter, model AN-SCI-ECO-6200
Going through the settings menu I came across a setting not listed in the instruction manual and cannot find any information about it.
In menu 01 (output source priority) after the normal 3 settings of USB, SUB & SBU it shows 'ntS' Thats how it's written on the display with a lower case 'nt' and capital 'S'
It would be interesting to find out what it does, any ideas anyone?
Many thanks in advance

 

[BentleyJ]

Standby??

 

[dtvking]

Standby??

Hi, the inverter still runs as normal so it would seem when put to this setting.