
Ageing, moisture and other environmental factors can lead to a loss of performance and reduced operational reliability in PV systems. This is due to changes in electrical properties caused by deteriorating insulation.
With solutions for continuous insulation monitoring and targeted fault-finding, Bender helps operators to identify risks at an early stage, prevent outages and operate their systems safely and cost-effectively.
Large-scale PV systems must be operated safely, reliably and economically over many years. Their operation presents various challenges. In particular, environmental factors such as UV radiation, moisture, temperature fluctuations and contamination, as well as the natural ageing of materials, contribute to changes in the electrical properties of the components.
Insulation faults are one of the most common and, at the same time, most critical causes of operational faults in photovoltaic systems. The particular challenge lies in the fact that insulation problems often develop gradually and are not immediately apparent during normal system operation. Nevertheless, they can have significant consequences. They affect the electrical safety of the system and, in extreme cases, can lead to dangerous situations. In addition, insulation faults also lead to power losses, an increased risk of faults and unplanned downtime, as well as high maintenance and repair costs. Operators of large-scale PV plants face the challenge of identifying these risks at an early stage and actively counteracting them.
Bender’s solutions lay the foundation for identifying changes in the system’s condition at an early stage and responding to them in a targeted manner. Continuous measurements reveal critical developments before they result in faults, outages or safety-critical situations. At the same time, they make a significant contribution to increasing the system’s availability and safeguarding energy yields.
Two solution components work in tandem: insulation monitoring using an adaptive measurement method and automatic insulation fault detection.
Continuous insulation monitoring detects low-resistance insulation faults early and reliably, before they compromise the safety and availability of the photovoltaic system. The adaptive measurement method takes into account the effects of weather, temperature and ageing, and adapts to the prevailing environmental conditions. As a result, Bender’s insulation monitoring devices deliver reliable measurement results at all times and help to prevent misinterpretations.


The safe and cost-effective operation of photovoltaic systems requires the early detection of changes in electrical characteristics and a targeted response to them. This minimises risks, prevents outages and ensures the long-term performance of the system.
Our experts will help you assess the requirements of your PV system and find the right solution for insulation monitoring and fault detection.