The UNI-T UT503PV PV Insulation Resistance Tester is a professional handheld tester designed specifically for solar photovoltaic (PV) installation, commissioning, maintenance and fault-finding applications.
Unlike a conventional insulation resistance tester, the UT503PV includes a dedicated PV insulation resistance measurement function for energised photovoltaic systems up to 1000V DC, allowing technicians to assess insulation condition on PV arrays and associated DC circuits.
It combines PV insulation resistance testing, conventional insulation resistance testing, AC/DC voltage measurement, automatic discharge, timed testing, comparison testing and data logging in one compact field instrument.
With insulation resistance measurement up to 4000MΩ (4GΩ), selectable test voltages up to 1000V, MC4 compatible test leads, USB connectivity and Bluetooth app support, the UT503PV is ideal for solar installers, commissioning technicians, renewable energy contractors and electrical maintenance teams.
Designed for Solar PV Testing
Solar PV installations present a particular challenge for insulation testing because the PV array may remain energised whenever sufficient sunlight is present.
The UT503PV incorporates a dedicated PV insulation resistance mode that allows insulation resistance testing on energised photovoltaic circuits where the system voltage is below 1000V DC.
This makes it particularly useful for:
- Residential rooftop solar
- Commercial solar installations
- Industrial PV systems
- Utility-scale solar farms
- PV string testing
- Solar inverter commissioning
- Preventative maintenance
- Insulation fault investigation