EcoFlow EFDELTA User Manual page 15

It allows users to connect two EF DELTAs in series to get continuous power that is two times more than a
single machine. The principle of using it is when the power of a EF DELTA is used up, the next machine can
immediately replace it to continue the power supply. This a entry-level UPS function that does not support
0ms in switching power.
Do not connect devices require high continuing power supply. Otherwise, please run multiple tests to
confirm it's compatibility before connecting devices, such as data servers and workstations, with EF
DELTA. EcoFlow do not take responsibility for any data loss or equipment damage caused by customers'
failure in following the instruction.
1.Entry-Level UPS user guide
Users can connect the EF DELTA AC charging cable to the power grid and connect a electricity device to
EF DELTA turn on the AC switch and automatically enter the entry-level UPS mode. When the external
power is cut o , battery will immediately supplied power to protect your device.
2. Series mode user guide
(Recommended for power users; all machines must be fully charged)
Users can connect no more than 2 fully-charged EF DELTAs 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. We do
not recommend you to charge more than two EF DELTA at the same time. Otherwise, the excessive load
may cause damage to the home power grid. To use this function, you need to set one EF DELTA as the
Master and the others as Serve 1. Connect one AC cable to the AC output port of the master unit and the
other side to the input port of Serve 1. After connecting the EF DELTA, turn all the AC switches on EF
DELTA on to activate multi-machine series mode. Finally, connect all the appliances to the AC sockets of
the Serve 1. Then you can charge your devices by using EF DELTA and enjoy the benefits from extended
powering time.
Example 1 ：
100%
Master unit AC on
AC ON/OFF
12V CAR
AC ON/OFF
12V CAR
100%
Serve unit AC on
AC ON/OFF
12V CAR
10
power a free life