1.1 Normal working mode：FREQUNCY in the LCD display is set as01. No matter whether there are AC loads connected to the inverter or not, theinverter’s output terminal will always have voltage ready to supply power tothe loads. Under this mode, the LCD will be displayed as bellow: 

1.2 Sleepmode：FREQUNCY in the LCD displayis set as 02. If the power of the loads that connected to the inverter is lowerthan 5% of the inverter’s rated power, there will be no output from theinverter. That is to say, only the chip of inverter is working under suchcondition and the power consumption is only 1-6W; If the power of the loadsthat connected to the inverter is higher than 5% of the inverter’s rated power,then the inverter will automatically start the inversion function and supplypower to the loads within 5s. As shown below:

2.  UPSfunction under utility mode(connectedto battery and utility .Can be set as utility first, battery standby mode and battery first, utility standby mode).

2.1 Utility first,battery standby UPS mode: FREQUENCY in the LCD display is set as 01. Whenboth utility and battery are connected to the inverter, utility willsupply power to the loads prior to the battery. When utility is cut off, thebattery will automatically continue to supply power after inversion.

Steps are as follows:

Step 1: When utility power is available, itwill output directly after voltagebeing stabilized and charge batteriesat the same time.

Step2: When utility power is cut off suddenly, the inverter will convert DC power to AC power automatically toensure uninterrupted power supply within 5ms.

Step 3: When utility power becomes availableagain, it will automatically transfer to utility supplying powerto loads and charge batteries at the same time.

SeeWorkflow as below.

LCD displayed as bellow:

2.2 Battery first, utility standby UPS mode: FREQUENCY in the LCDdisplay is set as 03.  When both utilityand battery are connected to the inverter, battery will supply power to theloads prior to utility. When battery capacity is not enough, utility willcontinue to supply power automatically.

Steps are as follows:

Step 1: When battery has enough power, it will supply powerto the loads directly

Step 2: When battery does not have enough power, it willautomatically transfer to utility supplying power to the loads

Step 3: After the battery is fully charged (e.g. by solar orwind charge controller), it will then automatically transfer to batterysupplying power to the loads.

See Workflow as below.

LCD displayed as bellow: