Products & Services

SolarBuyer provides a comprehensive range of products and services to manage product risk and quality from the early stages of project development through installation and operation of the product in the field.


Reliability Testing

SolarBuyer reliability testing is designed to evaluate the material and component quality of solar products by conducting extended stress testing on samples of the finished product. The reliability of a solar product is heavily dependent on the quality of materials and components used to manufacture it.

Reliability testing can verify long-term product field performance expectations. Certification type testing (UL or IEC) is inadequate to validate the long-term reliability of solar products – both in terms of duration and breadth of testing.

Manufacturers often assemble specific solar products from multiple sets of materials. Buying or financing a specific product therefore does not guarantee that every product ordered would contain the same materials or components. Reliability testing is therefore always based on testing a known set of materials and components – not just a specific product type.

SolarBuyer works with its main laboratory partner – DNV-GL PVEL – based in Berkeley, CA to conduct reliability testing. Reliability testing typically consists of the following:

  • Pan file generation; temperature coefficients (per IEC 61215 Ed.2)
  • Low irradiance efficiency (down to 100 W/m2 irradiance)
  • Incident angle modifiers (IAM)
  • Light induced degradation (LID – to full stabilization)
  • Polarization induced degradation (PID – technical guideline per IEC 62804)
  • Static mechanical load (per IEC 61215 Ed.2)
  • Salt mist corrosion to severity level 6 (per IEC 61701)
  • Extended damp heat (DH) testing (3000 hours)
  • Extended thermal cycling (TC) testing (800 cycles)
  • Extended UV (double IEC 61215 Ed.2 standard irradiance)
  • Extended multi-stress test (UV-TC50-HF30)
  • Extended dynamic mechanical load testing (per IEEE 1262)

Reliability testing can be used to qualify products in advance for projects or portfolios, or be used to verify the reliability of actual products delivered to specific projects. When testing is used to qualify specific products, the supply and financing of the product should be linked to the specific set(s) of materials and components that have been tested.