1. LCD display 
2. Bypass indicator 
3. Status indicator 
4. Charging indicator 
5. Fault indicator 
6. Function keys (Please refer to operation chapter for the detailed operation) 
7. AC input terminals 
8. AC output terminals 
9. Grounding terminal 
10. Battery input 
11. Circuit breaker 
12. RS-232 communication port 
13. USB communication port 
14. EPO port (Emergency power off) 
15. Parallel communication port (only for parallel model) 
16. Current sharing port (only for parallel model) 
17. Intelligent slot
