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Steca PAx4 Parallel switch box
The connections are made via an external box, the Steca PAx4.
A stand-alone PV system is relatively difficult to size, since often the loads and their average running times are not adequately known, or because, when the system is subsequently expanded, more loads are added.
This is where the simple expandability of the Steca Solarix PI inverters pays off. Up to four devices can be operated in parallel. The connections are made via an external box, the Steca
PAx4.
From the outside, the combination of two, three or four inverters functions like one device with a correspondingly higher capacity. Internally, in case of open-circuit operation or low output, e.g.
for the lighting, only one inverter continues to operate. This has a positive effect on the electricity consumption, since the devices which are not turned on do not consume any power. Only when a
higher capacity is called for, for example when a refrigerator is turned on, are all the inverters automatically switched on, thus ensuring trouble-free operation.
In this regard, Steca Solarix PI inverters are all the same. Only via the connection to the Steca PAx4 parallel switch box is one inverter designated as the master. This device then has control
over the system, whilst the other Steca Solarix PI inverters operate as slaves.
Technical Information:
| Ambient temperature: | -20 °C … +45 °C |
| Interfaces: | 6 x RJ45 (4 x inverter) |
| Degree of protection: |
IP 20 |
