PV Test Equipment
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Emazys

Z300

A smart, portable photovoltaic tester and troubleshooter for 1500V systems. Measures Voc, Isc, Riso, and series resistance, locates insulation faults, and connects to the emazys cloud via Bluetooth — designed for conventional and standard-efficiency module strings.

Insulation Resistance Voc & Isc Series Resistance Ground Fault Finding Arc Fault Finding Bifacial Modules Inrush Current New Module Technology
Key Specifications
Max Voltage (Voc)0 – 1500 V
Max Current (Isc)0 – 30 A
Insulation Resistance0 – 99 MΩ
Ground Fault LocationRiso < 3 MΩ
Series Resistance0 – 10 kΩ
HE Module ProtectionStandard
ConnectivityBluetooth / Cloud
Overview

The Emazys Z300 is the core photovoltaic tester and troubleshooter in the emazys product line — a professional-grade field instrument that combines Voc, Isc, insulation resistance, series resistance, and ground fault location into a single portable unit. Like all Z300-family instruments, it is Bluetooth-controlled via the emazys iOS and Android app, with automatic GPS tagging, photo capture, and real-time cloud sync to the emazys data platform.

The Z300 is designed for commissioning and O&M work on conventional and standard-efficiency PV module strings — residential, commercial, and utility-scale installations using PERC, polycrystalline, and standard monocrystalline modules. Its insulation resistance range of 0–99 MΩ meets IEC 62446-1 requirements for typical installations and its string test sequence delivers Voc, Isc, Riso, polarity, and fault position in a single workflow.

For sites using high-efficiency TOPCon, HJT, or bifacial modules with elevated capacitance and higher inrush currents at string level, the Z300 HE is the recommended instrument. The HE variant adds dedicated inrush current protection circuitry — an important consideration when working with high-density modern arrays.

Z300 vs Z300 HE — Key Differences
Both instruments share the same core test functions, Riso range, cloud platform, and app. The key difference is inrush current protection — which matters significantly when working with high-efficiency or bifacial module strings.
Feature Z300 Z300 HE
Max Voltage0 – 1500 V0 – 1500 V
Max Current0 – 30 A0 – 30 A
Insulation Resistance0 – 99 MΩ0 – 99 MΩ
Inrush Current ProtectionStandardEnhanced — HE & bifacial rated
TOPCon / HJT SafeUse with cautionYes — designed for HE modules
Series Resistance (Rs)0 – 10 kΩ0 – 10 kΩ
Ground Fault LocationRiso < 3 MΩRiso < 3 MΩ
Bluetooth App ControlYesYes
Cloud Sync & ReportingYesYes
GPS & Photo CaptureYesYes
Best ForConventional & PERC modulesHE, bifacial, TOPCon, HJT
Key Capabilities
Voc, Isc & String Testing
Measures open-circuit voltage and short-circuit current at string level with polarity check. Series resistance measurement helps identify connector degradation and wiring faults before they escalate.
Insulation Resistance (Riso)
Riso measurement to 99 MΩ — fully compliant with IEC 62446-1 commissioning requirements. Results are flagged against pass/fail thresholds and stored with GPS location data.
Ground Fault Location
When Riso falls below 3 MΩ, the Z300 activates tone tracing to locate the fault position within the string — significantly faster than section-by-section cable isolation.
Arc Fault Indicators
Series resistance measurement helps flag wiring conditions — degraded connectors, loose terminations, or high-resistance connections — that create the conditions for DC series arc faults over time.
Cloud & App Connected
Same Bluetooth app and emazys cloud platform as the Z300 HE. GPS tagging, photo capture, and module database integration. CSV and Excel export for reporting.
Module & System Coverage
Suitable for residential, commercial, and utility-scale arrays using conventional PERC, poly, and standard mono modules. For HE, bifacial, TOPCon, or HJT strings, the Z300 HE is recommended.
Full Specifications
Open Circuit Voltage (Voc)0 – 1500 V
Short Circuit Current (Isc)0 – 30 A
Inrush Current ProtectionStandard — conventional modules
Electrical Polarity CheckOK or Reverse
Insulation Resistance (Riso)0 – 99 MΩ
Ground Fault LocatorActive when Riso < 3 MΩ
Series Resistance (Rs)0 – 10 kΩ
ConnectivityBluetooth (iOS & Android app)
Data Managementemazys cloud — CSV / Excel export
GPS & Photo CaptureVia controller app
Power SourceRechargeable Li-ion battery (RRC 2054)
Test Lead Rating1500V CAT III (MC4 compatible)
StandardsIEC 62446-1 compatible
Documents & Resources
User Manual
Z300 PVT User Manual
Full field operating guide including setup, test sequences, and safety instructions
Datasheet
Z300 PVT Kit Items List
Complete kit contents and accessories reference sheet
Share Your Experience
Have you used the Emazys Z300 in the field? We'd like to hear how it performed — what worked well, where limitations were encountered, and how it compared to other instruments. Use the Request Advice form on our home page to share your experience.