IEC 61701 Salt Mist Test for PV Modules – Standards, Process & How to Get Certified
The IEC 61701 salt mist corrosion test is a crucial qualification for photovoltaic (PV) modules used in coastal or humid environments. It evaluates a solar panel’s resistance to corrosion caused by salty atmospheres, ensuring long-term durability and performance.
What Is IEC 61701?
IEC 61701:2020 is an international testing standard developed by the International Electrotechnical Commission. It assesses the corrosion resistance of PV modules exposed to salt mist environments, such as near coastlines or offshore installations.
This test helps manufacturers demonstrate that their modules meet durability requirements in harsh environments.
Why It Matters for Solar Panel Manufacturers
Compliance with IEC 61701 is often required for solar farm projects near the ocean.
Third-party certification can improve product trust, reduce risk, and expand your market access.
Passing this test ensures long-term corrosion protection.
IEC 61701 Test Procedure Overview
Expose modules to a controlled salt mist environment using a test chamber.
Run repeated exposure cycles (up to 96 hours or more, depending on severity level).
Inspect for electrical, mechanical, and visual degradation.
Compare pre- and post-test performance values (like power output and insulation resistance).
Choosing the Right Equipment
To carry out this test effectively, you need reliable and accurate equipment. ASLI provides both:
Salt Spray Test Chambers – for simulating corrosive salt mist conditions.
Temperature & Humidity Chambers – for post-test stability and stress verification.
Related Testing Standards
ASTM B117 – Common salt spray standard (not PV-specific).
IEC 60068-2-52 – Cyclic salt mist testing for electronic components.
IEC 61215 – General PV module qualification testing (includes performance and aging).
Who Needs This Test?
Solar panel manufacturers are exporting to Southeast Asia or South Africa.
Installers and EPCs working on coastal solar projects.
R&D labs validating product lifetime and warranty claims.
IEC 61701 compliance is not just a checkmark – it’s proof your solar panels can survive the real world. With the right test equipment and knowledge, your product can stand out in competitive global markets.
Looking to test your solar modules? Contact ASLI today for a demo of our salt spray and environmental chambers.
