Solar Panel warranty  for degredation and performance guarantees

A solar array must be able to withstand the most extreme climatic conditions, such as torrential rain and hail, fierce winds, ice and snow and extreme heat. Quality brands can honor their solar panel warranty & guarantees, and only the best solar panels can withstand conditions year after year for over 40 years.  There are only a handful of solar panels that have passed the TÜV Rheinland’s Long-Term Sequential Test, which included Temperature Cycling, Dynamic Mechanical Load, Humidity Freeze, Damp Heat, and two Potential Induced Degradation Tests – both Positive and Negative, while observing power degradation performance of the solar modules. Kyocera Solar panels were the first panel to pass the rigorous TÜV Rheinland’s Long-Term Sequential Test in 2010, followed by SunPower and Q.Cells, all of which are in our high class range.

 ‘Kyocera panels have shown a degradation of only 9.6%, over 25 years of real world testing’

kyocera solarAdvanced high performance technology with a demonstrated proven history of longevity and performance will be priced relative to its demonstrated quality. Cheaper budget products may offer the same warranty, but are they able to honor their guarantees? It is advisable to choose the product that can demonstrate longevity in real world conditions, and in the case of solar panels, their are only a handful of manufactures that can prove that their products can withstand real world conditions for 25+ years. Manufacturers like Kyocera and Sunpower are able to prove via real world testing, proving their panels can honor their warranty and even beyond.

Kyocera’s modules maintain performance even under very severe environmental conditions and its entire product line of solar modules has passed the Salt Mist Corrosion Test, IEC61701:2011 Edition 2, Severity Level 6, administered by TÜV Rheinland in Tempe, Arizona. Kyocera’s solar panels have evolved over 38 years of product development and pioneering research and are ideally suited in marine and coastal areas for long-term projects.

Kyocera created the world-renowned Sakura Solar Energy Center and is the site of a 43kW Grid-tie System, installed in 1984. This system consists of more than 1,000 Kyocera solar modules which have been exposed to over 45,000 hours of solar irradiation. Performance results have proven that after 25 years, these panels have shown a degradation of only 9.6%.

 ‘SunPower expects its modules (panels) have a useful life of more than 40 years’

Sunpower E20 Residential Solar PanelSunPower expects its modules (panels) have a useful life of more than 40 years, defined as 99% of modules producing at least 70% of their power. This is made possible through fundamental design differences which provide robust protection against real-world stresses. SunPower modules show significantly less degradation than Conventional Modules in the industry standard reliability stresses meant to simulate hot and humid environments and constant thermal cycling. Testing for the dynamic loading affects from shipping, installation, and field exposure also show less degradation. Finally, SunPower modules do not require a diode for safe operation in shaded conditions, removing the potential for a single point of failure.

The degradation modes modeled for solar modules are:

• Cell damage induced by ultraviolet (UV) radiation

• Photo-thermal encapsulant browning

• Polarization

• High-voltage degradation

• Soiling

• Other effects

Unlike degradation modes, failure modes do not cause appreciable degradation in performance until catastrophic failure. Two key failure modes govern the life of solar modules:

• Backsheet cracking due to relative humidity and hydrolysis

• Solder-joint failure due to temperature cycling

In the world of solar power, you get what you pay for. Always use trusted brands from manufacturers that have a proven history of quality and performance.