Quality High photovoltaic performance, efficiency and profit

Rigorous Quality Management Program

Hanwha Q CELLS runs 3 to 4 times stricter quality management system.

Our products have been independently tested and verified by the rigorous and independent quality assurance program of the German certification institute, VDE. We have raised the bar even higher by implementing internal quality testing programs with higher standards than those of the VDE.
Our testing ensures outstanding durability and world-class performance even in the harshest conditions: strong wind, heavy snow loads, salt stress, aridity, high temperatures, or humidity. Our testing standards are likely the reason we have passed all initial registration tests, including those of the IEC. All in all, Hanwha Q CELLS is recognized and renowned across the global PV industry as a brand with a superior level of quality.

In June 2015, PHOTON magazine announced that Q CELLS' solar panel model Q.PRO-G2 was the winner in the full-year yield measurement by the Photon laboratory in 2014 for the second consecutive year. Q.PRO-G2 outperformed not only all polycrystalline competitors, but also most of the mono-crystalline solar panels in the test of a total of 174 panels.
Hanwha Q CELLS obtained the “Top Brand PV” Seal of EuPD research for the markets in Europe and Australia for five consecutive years since 2014. Likewise, Hanwha Q CELLS modules achieved a “Top Performer” in 2017 DNV-GL PV Module Reliability Scorecard, which puts Hanwha Q CELLS to be among the overall “Top Performer”.

Quality Assurance at Q CELLS

  • The production of Q CELLS cells and modules is fully-automated. That way, we can ensure 100 % quality control - in Germany, Malaysia, and other locations.
  • IEC test criteria are not enough. In our own module testing center, we apply criteria that is 2-3 times harder than IEC.
  • Together with the VDE institute, we implemented the most comprehensive quality program of the industry – Quality Tested. For the first time, retesting is mandatory.
  • At the dynamic load tests at the renowned Australian Cyclone Testing Station (James Cook University), our modules were the first modules ever to withstand wind speeds of up to 350 km/h

Hanwha Q CELLS never stops improving its products. Our premium solar modules are the result of our industry-leading technical expertise. More than 400 scientists and engineers research, develop, and conduct tests in our four R&D centers located in Germany, Korea, Malaysia, and China. Therefore, it is no coincidence that our solar modules have set numerous world records for efficiency.

The Best Guarantee for Your Long Term Investment is our Quality

Low Light Behaviour of Solar Modules

What is a solar modules‘ low light behaviour and why is it important?

To evaluate a solar modules output performance, one shouldn’t trust the nominal power alone. The nominal power is measured at an ideal irradiance of 1000 W/m² which – in real life – only occurs once in a while on a sunny day in June. But what about regions with regular cloud cover, rain, mist, and prolonged low lights in the morning and evening?

Under those conditions the irradiance intensity can be reduced by up to 50% (partly cloudy sky) and more (cloudy sky). While in southern regions like Spain the ideal irradiance of 1000 W/m² represents approximately 19% of the global annual irradiance, it is negligible in northern countries like Germany (see graph Irradiance Kassel).

In addition, modules are installed at a lower tilt angle, while they are positioned vertically to the light source when tested for nominal power. Throughout the day, the angle at which the sun hits the module continuously changes due to the rotation of the earth. The smaller the angle, the lower the transition of sun light to electricity. Tracker can help but are a costly solution. Therefore, the module’s behaviour at low light conditions – the so-called low light behaviour – is just as crucial as the nominal power. Generally, to evaluate this behaviour the module’s efficiency is evaluated at 200 W/m².

How do Q CELLS solar modules perform in low light conditions?

Hanwha Q CELLS builds modules for real-life conditions. At 200 W/m² the new crystalline modules still achieve 98% of their initial efficiency, respectively. At an irradiance between 400 and 900 W/m² they can even exceed 100% of their nominal values. This was independently approved by the Fraunhofer ISE institute.

In conjunction with the excellent temperature coefficients as well as the high power classes, Q CELLS solar modules set new yield standards. In a benchmark test based on the common simulation software PVSol, Q CELLS modules achieved 2 % more yield in an installation in Munich, Germany, than the modules of strong brand competitors.

Solar Modules' Temperature Coefficient

What is a solar modules‘ temperature coefficient and why is it important?

The efficiency of a module depends on the module temperature. Rising module temperature leads to a decrease in efficiency. Therefore, the temperature coefficient for power output is the second most important factor that drives the module output under real-life conditions – next to the low light behaviour. Ask yourself: What happens when the air temperature climbs up to 40 °C on a hot summer day in Athens? What happens when the module heats up during power generation?

Solar modules can easily reach temperatures between 45 and 65 °C during operation – even on rather cool days. The temperature coefficient specifies the module’s relative performance decrease when the temperature rises by 1 °C (or Kelvin, K), calculated as a percentage of nominal power.

The industry standard for the temperature coefficient of the power output is currently set between -0.49 and -0.45 %/K. At a temperature of 65 °C this implies an efficiency loss of up to 18 % - directly mirrored in your yield data. Yet, beware: the values of temperature coefficients usually have a tolerance of ± 10 %. Most module manufacturers choose to use the best values not the most likely.

How do Q CELLS modules perform at increasing temperature?

Hanwha Q CELLS has engineered its modules to keep the power loss in check.The new solar modules exhibit one of the most efficient temperature coefficients for crystalline modules, being only -0.43 %/K.

What appears to be a minor change at the second digit only, quickly adds up to a 1% difference in yield, resulting in higher self-consumption and higher returns - something you will be glad to recognize in your yield data.