Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 62 -
SMA Regelsysteme GmbH
3.4.12 Connection to “ecopower-Mini-BHKW” and utility
Such a plant option requires a very careful design and installation in
order to prevent accidents based on the assumption that the plant is
deenergized as it is disconnected from the utility!
In several operating modes energy feeding into the external utility is
possible via the Sunny Island!
The illustrated interconnection plans show the principle grid connec-
tion.
In any case, the local applicable regulations have to be complied
with and the approval of the public utility company is mandatory!
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
2 A
L
N
Grid
L
N
utility grid
13
14
K3
Mains
SI-
BPRE
13
14
K4
SI-
contactor
24V=
+
-
SI-
BP24
*
K2
SI-
BPRE-OE
Fig. 3.19: Connection to an „ecopower Mini-BHKW“ and utility