All that noise

Arc fault circuit interruption was introduced as a standard for PV inverters many years ago, but against a backdrop of technical complications, the issue is still far from resolved. A recent report has found that many inverters fail this important task in challenging environments.

Issue 10-2019

Other nearby electrical appliances, as well as DC cabling and modules themselves, create significant inductance and capacitance, seen as noise on an oscilloscope. This can make the task of arc fault detection more complicated and lead to false alarms.

Image: PVEL

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