Loop impedance measurement on photovoltaic farms in IT systems with voltages up to 900 V AC is one of the greatest challenges in modern PV system diagnostics. High voltages, the specifics of IT networks, the presence of inverters, and the large scale of installations require not only specialized equipment, but also knowledge, experience, and a precisely planned measurement methodology. How can such measurements be carried out safely and effectively? Which standards must be met, and what should b
The measurement of current-voltage (I-V) characteristics of photovoltaic panels plays a key role in evaluating system efficiency and detecting potential issues within a PV installation. Learn how to perform accurate measurements in compliance with IEC 61829 using the advanced Sonel PVM-1530 Max meter. Discover the impact of environmental factors such as irradiance and temperature on the measurement results, as well as the importance of correcting these to standard test conditions (STC).
I-V c
In a world where we are seeing the rapid growth of photovoltaic micro-installations, it is essential to not only ensure their proper installation but also to regularly assess their technical condition. The advanced PVM-1021 Pro meter from Sonel S.A. delivers comprehensive, standard-compliant measurements, ensuring both the safety and high operational reliability of PV systems.
Growing Significance of PV System Checks
In 2025, the number of prosumer micro-installations in Poland is ex
With the number of photovoltaic systems on the rise, it is vital to ensure that they are safe and comply with applicable regulations. To meet these needs, we have designed our new Sonel PVM-1530 meter which is dedicated to measuring solar PV systems operating at voltages up to 1500V and meets the requirements of IEC 62446-1.
Growing significance of solar PV system checks
The energy sector is in the process of transforming from a conventional and centralised model to a distributed model. Th
With the increasing and dynamic development of solar photovoltaic farms and power plants, we are witnessing a growing demand for proper short-circuit loop impedance measurement between the inverter and the LV/MV transformer. To enable these tests to be made, Sonel have developed the Sonel MZC-340-PV high current loop impedance meter. The world's first meter designed for measuring short-circuit loop impedance in networks with voltages as high as 900V AC and are within the CAT IV 1000V measure
The developing world and industry are posing new challenges to electricians, for which not only a different approach than before is needed, but also completely new measuring equipment. This leap is best seen in electromobility and renewable energy sources, where the voltage of 1,000 V DC has long been exceeded.
Sonel comes to the rescue with its AHV-3 high-voltage adapter, which allows safe measurement of DC voltages up to 3,000 V. The word 'safe' is not used here by accid
The Sonel MPI-540-PV multifunctional meter for electrical installations parameters has enormous measuring capabilities not only in the area of photovoltaics, but also of low-voltage recipient installations, power quality or – with the use of additional accessories – electromobility.
In PV installations, we can use it mainly for category 1 measurements as defined by EN 62446, such as:
continuity of protective connections,
resistance of ground,
insulation resistance on the
