Steca Parallel switch box

Up to four Steca Solarix PI can be operated in parallel. The connections are made via an external box, the Steca PAx4.

A further innovation that has gone into the Steca Solarix PI is the communication with the solar charge controllers from the Steca Tarom and Power Tarom series. A data connection to the charge controller can be created via the Steca PAx4.

Steca Solarix PI with Steca Tarom

Communication with Steca Tarom charge controllers

A further innovation that has gone into the Steca Solarix PI is the communication with the solar charge controllers from the Steca Tarom and Steca Power Tarom series. A data connection to the charge controller can be created via the Steca PAx4 parallel switch box.

In this case, the inverter connected directly to the battery communicates the amount of energy that has been withdrawn to the solar charge controller. The controller is thus able to calculate the correct state of charge (SOC).

This means that these systems no longer need to be switched to voltage-controlled operation or an additional current shunt.

If the switch-off threshold of 30 % SOC is reached, the Steca Solarix PI receives a signal from the solar charge controller and subsequently switches itself off in order to protect the battery from deep discharge. It turns itself back on again once the SOC has reached the 50 % mark.