Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 61 -
SMA Regelsysteme GmbH
3.4.11 Connection to “ecopower-Mini-BHKW”
The Sunny Island is capable of controlling an “ecopower Mini-BHKW”-CHP unit via its
communication port COM3. To this extend the interconnection between the Sunny
Island and the CHP unit has to be performed as shown in Fig. 3.18. A three-wire
RS232 null-modem style communication (RxD, TxD, GND) is sufficient.
In order to afford an optimal charge regulation it has to be assured that sufficient
dumploads are installed in the system.
Be sure that the „ecopower Mini-BHKW“’s communication capability is en-
abled!
Sunny Island
13
14
13
14
N
L
F2
5 A
external distribution
L
N
K1
Dumpload 1
Dumpload 3
load
0,5 kW
load
2 kW
AC-
Outlet
SI-
BPRE
CHP
L
N
PE
Service COM3
13
14
K6
Dumpload 2
SI-
BPRE
3
load
4,5 kW
RS232
CHP ecopower
SI-
BPRE
K2
Fig. 3.18:
Connection to an „ecopower Mini-BHKW“