EcoFlow EF DELTA User Manual page 15

It allows users to connect multiple EF DELTAs in series to get continuous power that is multiple times of a
single machine. The principle of use is that when the power of a machine is used up, the next machine can
immediately replace it to ensure uninterrupted power supply. This a entry-level grade UPS function that
does not support 0ms switching.
Do not connect devices with high uninterrupted power supply requirements, and perform multiple tests
to confirm compatibility before connecting such devices as data servers and workstations with EF
DELTA. EcoFlow will not be responsible for any loss of data or equipment damage caused by customers'
failure in following the instruction.
1.Entry-Level UPS user guide
Users can connect the AC charging cable of EF DELTA to the power grid and connect a device to EF
DELTA and turn on the AC switch to automatically enter the entry-level UPS mode. When the external
power is cut o , power will be supplied from the battery immediately to protect your device.
2 . Series mode user guide
(Recommended for power users; all machines must be fully charged)
Users can connect multiple fully-charged EF DELTAs (Up to 3) in series using the AC charging cable to get
continuous power and supply appliances with high output requirements for up to 1.8 hours. In this mode, do
not connect EF DELTA to the power grid using an AC charging cable, or the overcurrent protection (<20A)
may be triggered. Connect EF DELTA to a home power grid and charge each EF DELTA separately. It is not
recommended to charge more than two machines simultaneously. Otherwise, the excessive load may cause
damage to the home power grid. To use this function, you need to at first set any of the machines as the
master and the others as Slave 1 and Slave 2. Connect one end of the AC cable to the AC output port of the
master unit and the other end to the input port of Slave 1. Then, connect one end of the AC cable to the AC
output port of Slave 1 and the other end to the input port of Slave 2. After connecting the machines, turn all
the AC switches of the machines on to activate multi-machine series mode. Finally, connect all the
appliances to the AC sockets of the Slave 2 and then you can charge your devices using EF DELTA and
enjoy the benefits of extended powering time.
Example 1 ：
100%
Master unit AC on
AC ON/OFF
12V CAR
AC ON/OFF
12V CAR
100%
Slave unit AC on
AC ON/OFF
12V CAR
10
power a free life