Function; Basic Principle; Feed-In Limit - Sonnen sonnenBatterie eco 8.0/2,5 Operating Instructions Manual

3 | Product description

3.4 Function

3.4.1 Basic principle

Illustration 1: sonnenBatterie function
1
2
3
The storage system (2) is connected to the PV system (1) and the public electrical mains
(5). Furthermore the current consumption of the consumers in the building (3) is con-
stantly measured (4).
Generation > Consumption
If the generation of power is greater than the consumption, there is a surplus of electrical
energy. In this case as much as possible of this surplus is used to charge the battery of the
storage system.
If the entire portion of the surplus can not be charged into the battery, the remaining sur-
plus is fed into the public electrical grid.
Consumption > Generation
If the consumption is greater than the generation of power, there is a deficit of electrical
energy. In this case the battery is discharged to even out as much of the deficit as possible.
If the entire deficit can not be compensated by discharging the battery, the remaining de-
ficit is covered by the public electrical grid.

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.
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PV system
Storage system
Consumers in building (e. g. washing machine,
hob, lamps, refrigerator, etc.)
4 Measurement of consumption
5 Public electrical mains
Operating instructions sonnenBatterie eco 8.0