Bluetti EP600 - Safety Instructions and Precautions; 1.1 General Safety Guidelines; 1.2 Installation & Electrical Safety

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5.3 Distinguish between Master and slave devices
Once both devices are bound, go to the main interface of the app and click on Parallel, then you
can see the name of the product corresponding to that serial number, and then write down the
names of the two products.
5.3 Distinguish between Master and slave devices
Here is an example:
Device 1:
PBOX2236002423322
EP6002326000001749
Device 2:
PBOX2236002429371
EP6002251000343163
Here we choose two serial numbers, the one with the smaller number as the Master.
(EP6002251000340163＜ EP6002326000001749)
So we'll go with the smaller serial number here as the Master
PBOX2236002423322
EP6002251000340163