GERMAN vs CHINESE SOLAR PANELS.
THE DIFFERENCE.


German made Perth Solar Warehouse solar energy systems vs the rest. See the differences below in comparative, side by side detail. Be guided by what is important to you.

INDUSTRY PRESENCE


When quality surpasses quantity.


A company’s ability to manufacture successful products over time is defined by time itself. Many things done right will always take you further.

SOLARWORLD AG (MADE IN GERMANY)
42 years
Premium Chinese AVERAGE
15 years
Tier 1 Chinese AVERAGE
5 Years
 

PRODUCT WARRANTY


Comprehensive warranties define proven durability.


A manufacturer’s product warranty is a testament to any individual products build quality, and it’s suitability for a given location over time.

SOLARWORLD AG (MADE IN GERMANY)
20 years
Premium Chinese AVERAGE
12 years
Tier 1 Chinese AVERAGE
10 Years
 

MATERIAL QUALIFICATION


The often forgotten elements.


Despite the vertically integrated nature of most leading solar panel manufacturers certain elements still require outsourcing for supply.

Backsheet selection:

SOLARWORLD AG (GERMAN MADE)
3
Tier 1 Chinese Average
80

The backsheet protects a solar cells electrical integrity on the reverse side. There are over 80 different kinds of backsheets on the market. Only three of these are proven effective to withstand extreme weather conditions and UV radiation for a solar panels life expectancy and beyond.

Incorporating precision components ensures results.

 

CONSTRUCTION


Superior construction produces more power, longer.


Fully automated systems combined with strict material flow monitoring, regular electrical and visual measurements, as well as intermediate process inspections deliver solar panels built to last.

Solar cell production:

SOLARWORLD AG (GERMAN MADE)
Full Automation
Tier 1 Chinese Average
Partial Automation

Eliminating the need for manual handling of a solar panels most delicate component ensures a solar cells long-term integrity.


Protective glass and film:

SOLARWORLD AG (GERMAN MADE)
Full Automation
Tier 1 Chinese Average
Moderate Automation

Solar cells are protected from the elements with the precise implementation of the associated solar glass and rear backsheet (film).


Electrical junction box:

SOLARWORLD AG (GERMAN MADE)
Full Automation
Tier 1 Chinese Average
Partial Automation

The junction box on the rear of the solar panel requires flawless functionality and insulation to endure the expected environmental stresses once installed.


Module frames and sealing material:

SOLARWORLD AG (GERMAN MADE)
Full Automation
Tier 1 Chinese Average
Minimal Automation

Providing the finish touches to the visual aesthetics, this is also the final seal to completely encapsulate the delicate solar cells to ensure zero ingress for over 30-years.

TESTING


Diverse Long-term Testing Procedures.


Extensive testing holds material selection and the manufacture of any end product to account. Given the nominated life expectancy, solar panels need in-depth testing to ensure the stamped performance or greater when subject to intense environmental factors daily.

Climate chamber testing (-40 to +85 deg C):

SolarWorld AG (German Made)
9125 Cycles
Tier 1 Chinese Average
200 Cycles

A highly accelerated life cycle test which simulates 9125 cycles, a workload of 25 years. IEC standard requires on 200 cycles


Module breakage test & hail impact test:

SolarWorld AG (German Made)
535 gm
Tier 1 Chinese Average
7.53 gm

A natural hailstorm is replicated by dropping a 535-gram, 51mm diameter steel ball onto a solar panel from a height of 4m. This is repeated 20 times at 11 different points of impact. IEC only specifies a standard weight of 7.53 grams.


Hotspot testing:

SolarWorld AG (German Made)
100%
Tier 1 Chinese Average
1%

Thermography and electroluminescence measurements detect intermediate resistance, thermal zones or conduction loss in solar cells, contacts and junction box.


Hemispheric lighting test:

SolarWorld AG (German Made)
100%
Tier 1 Chinese Average (N/A - 0%)
Indoor Only

Performance analysis which examines the behaviour of the solar modules under conditions as authentic as possible, simulating daily and annual changing light conditions, including related temperature variations.


Test environments:

SolarWorld AG (German Made)
Indoor & Outdoor
Tier 1 Chinese Average
Indoor Only

Testing the weathering resistance of a solar module in the open environment and not just under laboratory conditions.


Advanced mechanical load test:

SolarWorld AG (German Made)
Extreme
Tier 1 Chinese Average
Mild

A test simulating extreme wind pressure and suction forces affecting solar modules such as a severe winter and higher altitudes in which solar modules are exposed.


Salt spray testing (maritime climates):

SolarWorld AG (German Made)
100%
Tier 1 Chinese Average
2%

A solar modules ability to fulfill all requirements of DIN EN 61701 salt spray test.


Desert condition testing:

SolarWorld AG (German Made)
100%
Tier 1 Chinese Average
1%

A solar modules ability to sustain electrical and structural integrity through extreme environmental conditions such as high wind speeds, temperature variations and extreme sand storms in accordance with DIN EN 60068-2-68.


UV light ageing test (kWh/m2):

SolarWorld AG (German Made)
3000
Tier 1 Chinese Average
15

3000 kWh/m2 simulates 57 years of UV radiation exposures at 60 degree C. IEC standard requires a UV dose of only 15 kWh//m2, despite the annual UV radiation in Central Europe alone being 50 kWh/m2.


Electrical testing:

SolarWorld AG (German Made)
Dry & Wet
Tier 1 Chinese Average
Dry Only

Testing carried out on both wet and dry conditions including alternating temperature cycles. In addition, applying a partial discharge test to determine the modules reaction to high voltages.


Ammonia resistance testing (high-level):

SolarWorld AG (German Made)
100%
Tier 1 Chinese Average
1%

Utilising three independent inspection marks (DLG, TUV Rheinland and SGS), laboratory tests are conducted to determine if a solar module can withstand the effects of ammonia in barn air over a 20-year period.


Ensure your short and long-term solar production and ultimate satisfaction by understanding what truly defines a solar panel. Success is in the detail. This information has been obtained and interpreted in conjunction with the following document available for download in definative detail: Real Value, The Advantage of Quality -SolarWorld AG

PERFORMANCE


Better performance guarantees.


All solar panel performance depreciates in any environment different from Standard Test Conditions. An excellent solar panel negotiates degrading environmental factors to deliver peak performance for longer.

Performance warranty period:

SOLARWORLD AG PROTECT (MADE IN GERMANY)
30 Years
Premium Chinese Average
25 Years
Tier 1 Chinese Average
25 Years

Output degradation per annum (if linear):

SOLARWORLD AG PROTECT (MADE IN GERMANY)
0.3%
Premium Chinese Average
0.7%
Tier 1 Chinese Average
0.7%

Performance degrading factors to consider: luminous intensity, UV radiation, temperature stress, ammonia/ agriculture, salt spray, hail, high winds, localised periodic shading.

INTERNATIONAL AWARDS


Independent awards from known global industry institutes.


Why is this important? The simple answer is the rated information on the product data sheet and on the specification plate of the solar panel is accurate or better, in a diverse array of environments and conditions. In most cases the product actually exceeds the expected performance. Always remember, no 2 solar installations are the same, neither should the choice of solar panel be the same.

Just because an individual or brand states 25 years performance doesn’t guarantee 25 years performance is possible.

2007

Photon Award

2007

Photon Award

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2009

Photon Award

2009

Photon Award

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2010

Photon Award

2010

Photon Award

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2013

PV Magazine Test Award

2013

PV Magazine Test Award

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