Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 157 -
SMA Regelsysteme GmbH
Many more parameters will have an effect on the system. But unless there are co-
gent reasons to change them, their default values should be retained unchanged.
For a more detailed description of the parameters refer to Chapter 16.
In a three-phase system each Sunny Island has to be equipped with a
SIPBRE-OE for K3. All contacts of these relays have to be connected in
serial to control the mains contactor.
11.4 Mains Backup System with Generator and PV
For mains backup systems with frequent long-term grid failures it might be expedient
to integrate a genset. The Sunny Island is capable of controlling this configuration as
well, as shown in Fig. 11.4.
Fig. 11.4 shows a system without the opportunity for a discrete billing of solar energy
fed into the public grid. But this function can easily be integrated (cf. Fig. 11.3).
This type of plant configuration requires a very sophisticated plan-
ning and commissioning in order to prevent any kind of accident
with live wires that are assumed to be safe to touch. All local regula-
tions and laws must be met and the approval of the public utility
company is mandatory!
