Quality by SolarWorld

How we manufacture the highest quality solar panels

A higher standard of quality

Solar panels produced at SolarWorld manufacturing plants have operated in the field for the past 40-plus years, making us the longest continuously running commercial solar manufacturer. Only SolarWorld has the track record to prove that our solar panels outlast and outperform warranty expectations. How do we do it? By carefully controlling and precisely executing every step in the manufacturing process. The SolarWorld Standard goes beyond quality assurance to elevate solar to unprecedented standards.

It’s the only way to guarantee an outstanding product. Every. Single. Time.

Download the SolarWorld Quality flyer

What do we do differently?

Critical quality parameters are checked at more than 100 inspections points
along the line.
  • Extreme solar panel testing
  • Rigorous top quality material selection
  • Inspection and trace-ability
  • Superior junction box
  • Fully automated manufacturing
  • Third-party validation
  • Constantly innovating

SolarWorld extreme testing

Panel breakage test.

Subjects our panels to brutal impacts by heavy or hard objects to ensure stability and break-resistance. Occasionally hard objects fall onto roofs and we conduct these test to ensure that our roof-mounted solar system will withstand these impacts. For good measure, we also drop a 99-pound, lead-filled sack from a height of four feet onto the middle of vertically positioned solar panels up to three times.

Hail impact test

Replicates a natural hail storm by dropping a 1.1-pound, one-inch steel ball onto solar panels from a height of 13 feet. Then we repeat this up to 20 times in the same place on at least 11 different points of impacts.
Inclined plane test. Tests the effects of snow load on the lower edge of our solar panels, which simulates real-world conditions since sliding snow and ice apply pressure to the lower part of the frame. Other companies typically test evenly distributed snow load on a horizontal panel, even though installations almost always parallel the slope of a roof.
Salt spray test. Makes sure our panels are ideally suited for coastal areas and salty air by exposing the solar panel to a salt mist mixture and then storing it under humid conditions to simulate coastal conditions. We voluntarily submit our panels for this optional test to guarantee maximum performance and further demonstrate our commitment to quality.
Hemispheric lighting test. Simulates authentic light and temperature conditions to make sure our panels deliver optimal performance in the real world—which includes changing weather patterns.
Mechanical load test. Ensures our panels withstand extreme weather conditions, including excessive wind pressure, wind suction and snow load. Alternating pressure and suction are applied up to 1.2 million times using both static and dynamic forces, far exceeding IEC standards.
UV light aging test. Guarantees excellent results from our solar panels even in some of the brightest spots on the planet. We simulate 25 years of intense UV radiation, including 1300 kWh/m2 in normal conditions and up to 3000 kWh/m2 in desert conditions, which far exceeds IEC test standards.
Climate chamber test. Puts our solar panels through extreme temperature fluctuations in order to emulate 25 years of weather changes. In the climate chamber, the modules withstand temperatures as low as -40 degrees Celsius to as high as 85 degrees Celsius. We repeat this cycle 9,125 times versus the mere 200 cycles required by the IEC
Field installation and peel tests. Tests performance by exposing our solar panels to real wind and weather conditions in varying climate zones—not just contrived laboratory conditions. In field tests, data consistently shows our panels perform well above 100 percent of predicted models. At the same time, peel tests confirm the superior reliability of our sheet-to-glass and inter-sheet connections, which is a key contributor to the long lifespan of SolarWorld panels.
Electrical and hotspot tests. Assures optimal insulation and electrical safety in both wet and dry conditions in a broad range of temperatures. Electroluminescence measurements identify otherwise undetectable micro-cracks or contact breaks while thermography cameras search for “hot spots,” which can occur when cells lie in a shadow and heat up as a result of residual electricity, ultimately damaging the panel over time.