Sonnen sonnenBatterie hybrid 9.53, Operating Instructions Manual, Page: 12 / 28

3 | Product description
12 / 28 Operating instructions sonnenBatterie hybrid 9.53
3.4.2 Feed-in limit
PV systems are subject to a feed-in limit in some circumstances. The feed-in limit restricts
the PV system’s feed-in power at the mains connection point.
Example
• Nominal power of PV system: 10 kWp
• Power limit: 50 %
• Maximum feed-in power: 5 kW
In this example, the feed-in power of 5 kW must not be exceeded. The following figure
shows an example of the PV system’s production over the course of a day.
Illustration 2: Example: feed-in limit at 50% of
nominal power
1 Charging of storage system
2 Switch-on of consumers via self-
consumption switch
3 Switch-on of consumers via
sonnenSmart plug
4 Midday peak, which must not be fed
into the electrical mains
To prevent production reduction – and therefore
energy loss – the excess energy is first stored in the
storage system (1) and consumption is increased by
switching on consumers (2, 3). Production is only
reduced if these measures do not lead to the de-
sired limit.
Measures for limiting feed-in are explained in detail in the following. The individual meas-
ures are carried out one after the other. Only when one measure does not achieve the de-
sired reduction is the next measure introduced.
1. Charging of battery
Excess energy is directed to the storage system battery. In order for this to occur, there
must be sufficient storage capacity available in the battery.
2. Activation of the self-consumption switch
Consumers connected to the permanently wired switch output are switched on here.
3. Switch-on of consumers (via sonnenSmart plug)
The consumers are activated as soon as the feed-in limit is exceeded. The consumers are
deactivated again once the level has dropped below the limit and stayed there for at least
three minutes.
4. Reduction of PV power
Production is reduced via an integrated switch contact on the inverter. This limited the PV
inverter to a set power output. In order for this to occur, the inverter must support power
reduction using a switch contact or an external solution (e.g. a solar datalogger). Configur-
ation and connection are carried out by the electrician.