Z300 PVT kit

The Z300 Photovoltaic Tester & Troubleshooter (PVT) is a 1500 V  / 30 A multi function instrument for the modern PV technician. The instrument is capable of both testing and troubleshooting, and does it with unprecedented speed. The user may store test results as well as meta data (GPS, photos, time) via the Z300 controller app. 

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SKU: 14-1 Category:


Z300 PVT product overview

Feature / functionZ300 PVT
Voltage range for Voc test0 – 1500 V
Voltage accuracy+/- 0.1 %
Current range for Isc test0 – 30 A
Current accuracy+/- 0.1 %
Resistance range for isolation resistance Riso test0 – 40 MΩ
Accuracy of Riso fault position test+/- 0.5 PV module resolution
Condition for Riso fault position testIrradiation > 100 Watt per sq. meter
Condition for Riso fault position testRiso < 3MΩ
Polarity checkYes
Tone generator to map out strings0 – 100 kHz
Amplifier probeIncluded
Wireless connection to controller deviceBluetooth
Controller app operating systemiOS and Android available
Module databaseYes – 17.000 modules
String test time to complete20 seconds
Report functionIn app – print to PDF
Battery modelRCC-2054
Battery technologyLi-Ion, DC 15 V, 3200 mAh, 48.0 Wh
Operation time8-10 hours

Please note that modern high-efficiency PV modules can have high electronic capacitance. This capacitance can and will cause inrush currents. If the inrush current is large enough, it can trigger the Z300 PVT over-current protection circuit, which activates around 50 A. We recommend that strings of modules with efficiencies higher than ~ 19% should deliver a maximum of 10 A in total when tested with the Z300 PVT.

The inrush current scales with higher PV module efficiency, and in general, a higher current or voltage will increase the inrush current. For example, bifacial modules are more likely to present inrush currents.

A reduction of string voltage (e.g., by breaking down strings into half-length) can be a remedy to avoid excessively high inrush currents. Another method involves adjusting tracker orientation when this is possible.

The most straightforward method for reducing inrush current is to simply test at lower levels of solar irradiance. Keep in mind that the Z300 PVT is partly designed for troubleshooting and fault finding. These specialized test features work perfectly fine even at very low irradiance.

Additional information

Weight6 kg
Dimensions35 × 35 × 28 cm