Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 60 -
SMA Regelsysteme GmbH
3.4.10 Connection of a Dump Load
If there is a surplus of energy in the island grid which is not utilized, but cannot be
stored either because the batteries are fully charged, it makes sense to connect an
additional consumer (dump load). It is connected to one of the relays not yet used
otherwise (K1 to K8) as shown in Fig. 3.17.
The switched current of the relays K1 to K8 is a maximum of 5 A at
230 V AC. A detailed limit curve is shown in Chapter 13.
Sunny Island
13
14
13
14
N
L
F2
5 A
external distribution
L
N
K3
K4
control
relay 3
control
relay 4
load
> 1 kW
load
< 1 kW
AC-
Outlet
SI-
BPRE
SI-
BPRE
Fig. 3.17:
Connection of an additional load (“dump load“)