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that it does not go to waste. The feed-in limitation is only active if the power fed
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 power limit.
The value of the total permissible feed-in power must be set.
"Total DC system power"
Input field for the total DC system power in Wp.
This value is used if the
tem"
"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"
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 on Fronius inverter:
Consumption in home:
Maximum permitted feed-in power of the entire system:
Case 1: The battery can be charged
Power at grid feed-in point:
Power at inverter output:
Power into the battery:
Case 2: The battery cannot be charged
Power at grid feed-in point
Power at inverter output:
Power into the battery:
In this example, no more than 3 000 W may be fed into the grid at the grid
feed-in point. However, any loads that are located between the inverter and the
grid feed-in point can be supplied by additional power from the inverter. These
loads are also compensated as required.
126
"Maximum permitted feed-in power of the entire sys-
is specified in %.
"Soft
Limit".
60 % = 3 000 W
5 000 W
1 000 W
0 W
1 000 W
3 000 W
3 000 W
4 000 W
0 W
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