90
P
Pa
arra
am
me
ette
err
D
De
effa
au
ulltt vva
allu
ue
e
R
Ra
an
ng
ge
e
F
Frre
eq
qu
ue
en
nc
cyy S
Sh
hiifftt P
Po
ow
we
err
C
Co
on
nttrro
oll
OFF
ON / OFF
F
Frre
eq
qu
ue
en
nc
cyy S
Sh
hiifftt T
Te
esstt
OFF
ON / OFF
S
Se
ett T
Te
esstt F
Frre
eq
qu
ue
en
nc
cyy
50.00 Hz
50.00 ~ 55.00 Hz
If PV inverters are connected on the AC side during battery-backup operation, the hybrid
inverter must be able to limit their output power. This limitation becomes necessary
when, for example, the hybrid inverter's battery is fully charged and the power available
from the PV system exceeds the power requirement of the connected loads.
To prevent excess energy from overcharging the battery, the hybrid inverter automati-
cally detects the problem and changes the frequency at the AC output. This frequency
adjustment is analyzed by the PV inverter. As soon as the power frequency of the bat-
tery-backup grid increases beyond the value specified in S
Se
ett T
Te
esstt F
Frre
eq
qu
ue
en
nc
cyy, the PV
inverter limits its output power accordingly.
Before retrofitting the existing PV system to an off-grid port, the F
Frre
eq
qu
ue
en
nc
cyy S
Sh
hiifftt
P
Po
ow
we
err C
Co
on
nttrro
oll parameter needs to be enabled. It must be ensured that the connected
PV inverters limit their power at the AC output via the hybrid inverter due to changes in
frequency. The frequency-dependent active power limitation PF must be set in the PV
inverter.
When the battery SOC is greater than 85%, the Hybrid inverter will standby be-
fore starting when switching off-grid, and does not support seamless
switching.
User Manual