that it does not go to waste. The feed-in limitation is only active if the power of
feeding in is higher than the set power reduction.
"Off"
The inverter converts the entire available PV power and feeds it into the public
grid.
"Limit for entire system"
The entire photovoltaic system is limited in accordance with a set feed-in limit.
The value of the total permissible feed-in power must be set.
"Limit per phase"
Each individual phase is measured. If the permissible feed-in limit is exceeded on
one phase, the total power of the inverter is reduced until the value on the af-
fected phase is permissible again (see example below). This setting is only neces-
sary if required by national standards and regulations. The value of the permiss-
ible power of feeding in per phase must be set.
Example: "Limit per phase" (setting value: 1000 W)
Phase 1 Phase 2 Phase 3 Total
Max. possible production [W] 1000 1000 1000 3000
Set value
"Limit per phase" [W]
500 1500
Load demand in the household
network [W]
500 750 1250 2500
Load coverage in the household
network via PV system [W]
500 1500
Purchase from the public grid
[W]
0 250 750 1000
"Total DC system power"
Input field for the total DC system power in Wp.
This value is used if the "Maximum permitted feed-in power of the entire sys-
tem" is specified in %.
"Hard Limit"
If this value is exceeded, the inverter switches off within max. 5 seconds. This
value must be higher than the value set for "Soft Limit".
"Soft Limit"
If this value is exceeded, the inverter will regulate down to the set value within
the time required by national standards and regulations.
"Maximum permitted feed-in power of the entire system"
Input field for the "Maximum permitted feed-in power of the entire system" in W
or % (setting range: -10 to 100%).
If there is no meter in the system or if a meter has failed, the inverter limits the
feed-in power to the set value.
Example: Feed-in limitation
(without consideration of the efficiency)
PV system to Fronius inverter 5000 W
Loads in the house 1000 W
Maximum permitted feed-in power of the entire system 60% = 3000 W
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