All series of Autarco inverters are protected by an integrated residual current monitoring device which protects against feeding-in DC fault currents to the grid. They fulfil this requirement in accordance with DIN VDE 0100-712 as well as IEC 60364-7-712:2002.

Our larger digitilised inverters (XLX-MII and OX Series) come equipped with residual current suppression technology which;

• Reduces residual currents produced within the inverter.
• Allows for small reductions in residual currents produced in the PV Arrays.

If the PV Array is producing high residual currents (the common scenario) the residual current suppression technology can not remove them. The root cause in the PV Array must still be diagnosed and resolved.

When a residual current is detected that exceeds the allowed limits the inverter will shutdown and send an error.

• ILeak-PRO01  30mA
• ILeak-PRO02  60mA
• ILeak-PRO03  150mA
• ILeak-PRO04   300mA

For more details on how to troubleshoot high residual current values please see the Issue Resolution page; Residual Currents.

In special situations it is possible to adjust the max residual current limit on the inverter.

There are various applications where the use of RCD’s are mandatory. If an RCD is used, we recommend the use of Type A RCD with the highest tripping value allowed.

For large commercial projects tripping values of 300mA and less may cause tripping in wet or humid weather.

In certain applications the use of RCD’s with low tripping values may be required.

It is possible to lower the threshold in the inverter so that the inverter shuts down, prior to flipping the external RCD.

Please contact support if you feel this may be necessary.

For usage of residual current devices with Autarco grid-tied inverters, please see Declaration.