IEC 62446-1:2016 is the international standard that defines the required electrical tests, documentation, and reporting for verifying the performance and safety of grid-connected photovoltaic (PV) systems. It is most commonly applied during commissioning, routine maintenance, or fault investigations — ensuring that the electrical characteristics of a solar installation meet design expectations and operational safety requirements.
As part of our optional string-level electrical testing service, we carry out non-invasive tests in accordance with IEC 62446-1 to assess the DC-side health of your solar system. These tests include:
- Open-Circuit Voltage (Voc) – Verifies correct string voltage and helps detect module or connection faults.
- Short-Circuit Current (Isc) – Confirms expected current output under standard irradiance.
- Insulation Resistance – Checks the electrical insulation of PV strings relative to ground to identify degraded cables or potential safety risks.
- Polarity Verification – Ensures correct string wiring and identifies reverse connections.
- String Continuity – Confirms uninterrupted connectivity through the string.
These electrical tests are typically performed from accessible locations such as DC isolators or inverter string terminals, no roof access or system disassembly is required. When combined with thermal imaging inspections under IEC 62446-3, this provides a comprehensive picture of both electrical and thermal performance, all delivered through our structured Survey → Analysis → Reporting methodology.
The results are compiled into a clear, standards-aligned report designed for your installer, O&M provider, or insurer to interpret and act on.
