Dynamic power reduction takes account of self-consumption by the household before the
power of an inverter is reduced:
- A custom limit can be set.
- A Fronius Smart Meter can be connected to the D- / D+ connection sockets for Mod-
bus data on the system monitoring datalogger.
With the Fronius Symo Hybrid, any PV power that is not allowed to be fed into the grid is
used to charge the battery instead so that it does not go to waste. Dynamic power reduc-
tion is only activated if the battery is full or cannot be charged for some other reason.
"No limit" - The photovoltaic system converts all the available PV energy and feeds it
into the grid.
"Limit for entire system" - The entire photovoltaic system is limited in accordance with
a set power limit.
Field for entering the total DC system power in Wp.
This value serves as a reference for the rule and also for failures (e.g. a meter failure).
Field for entering the max. power in W or % (up to two decimal places, negative values
can also be entered).
If no meter has been selected under the "Meter" menu item:
Max. power produced by the entire system.
If "Fronius Smart Meter" or S0 inverter has been selected under the "Meter" menu item:
Max. grid power feed
Example: Dynamic power reduction
(efficiency values have not been taken into account)
PV system to Fronius Symo Hybrid: 5000 W
Household consumption: 1000 W
Max. grid power feed: 60% =
3000 W
Case 1: The battery may be charged
Power at grid feed-in point: 0 W
Power at inverter output: 1000 W
Power to the battery: 3000 W
Case 2: The battery must not be charged
Power at grid feed-in point 3000 W
Power at inverter output: 4000 W
Power to the battery: 0 W
In this example, no more than 3000 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 com-
pensated as required.
DNO Editor –
Control priorities
For setting the control priorities for the ripple control signal receiver, the dynamic power
reduction and control via Modbus
115
EN
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