What is the meaning of dip switch？

The DIP switch is used to configure the number of battey packs which are to inverter. Conguration activated by inverters:

0- Matching 1*T-BAT H 5.8

1- Matching 2*T-BAT H 5.8

2- Matching 3*T-BAT H 5.8

3- Matching 4*T-BAT H 5.8

Black start:

4- Matching 1*T-BAT H 5.8

5- Matching 2*T-BAT H 5.8

6- Matching 3*T-BAT H 5.8

7- Matching 4*T-BAT H 5.8