What is frequency shifting power reduction?
All UL1741SA compliant grid-interactive inverter has the Frequency-Watt feature, which requires the grid-
interactive inverter to reduce power with the increasing of grid frequency when grid frequency is over 60Hz.
The power will drop to zero before the over frequency trip threshold is reached.
When the Luxpower hybrid inverter requires the grid interactive inverter to reduce power, it simply shift the
output frequency up a bit, the grid-interactive inverter will limit its output power accordingly after sensing this
frequency shift.
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Users need to enable AC coupling function when they connect existing on grid system to EPS terminal.
Utility Meter
Generator
Manual
Bypass
Switch
N
PE
L1
L2
PE
N
L2
L1
L
1
L
2
N
E
P
S
G
E
N
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R
ID
L
1
L
2
L
1
L
2
Master inverter
PE
N
PE
L1
L2
PV
BA
T
L
1
L
2
N
E
P
S
G
E
N
G
R
ID
L
1
L
2
L
1
L
2
Slave inverter
PE
N
PE
L1
L2
PV
BA
T
L
1
L
2
N
E
P
S
G
E
N
G
R
ID
L
1
L
2
L
1
L
2
Slave inverter
PE
N
PE
L1
L2
PV
BA
T
+
-
CT
CT
2
CT
1
Kw
. h
7
9
8
6
6
480r/kw
. h
10A
Utility Panel
Generator Panel
Load
Panel
Debug
Charge
Discharge
Device info.
Basic
Advanced
Restart inverter
Reset
Standby:
Feed-in grid
Feed-in power(kW)
Fast zero export
Set