Linear Performance Guarantee
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SolarWorld UK
9 Berwick Courtyard
Berwick St Leonard
Salisbury
Wiltshire
SP3 5UA
service-uk@solarworld.com

The linear performance guarantee

More performance guaranteed

With the introduction of the linear performance guarantee in 2011, SolarWorld became the first company in the sector worldwide to set a new guarantee standard. Instead of offering guarantees that end after 10 or 20 years like other manufacturers did, SolarWorld introduced the continually decreasing linear performance guarantee. This guarantees a maximum performance reduction of a fixed percentage over a period of 25 years. A minimum value is set for the output of the SolarWorld modules every year for a 25-year period. This means that the guaranteed performance of the solar module is higher at every point in time than with the standard tiered guarantee and therefore provides real added value. Today, the linear performance guarantee is standard for most manufacturers.

All guarantee details for our solar modules can be found in our service certificates, for example:

  • Extended product workmanship warranty
  • Characteristic values of our linear performance guarantee
  • Additional general conditions like validity and contact partner

Your benefits with our performance guarantees over 25 years and over 30 years at a glance:

The linear performance guarantee for Sunmodule Plus and Sunmodule XL

  • 20-year product warranty
  • 25-year linear performance guarantee
  • At least 97% of nominal power in the first year
  • Guaranteed maximum performance reduction of 0.7% per year
  • Guaranteed performance of 90% after 11 years
  • Guaranteed performance of 80.2% after 25 years

The service certificates of our modules are available in our download section.

The linear performance guarantee for Sunmodule BIsun protect

  • 20-year product warranty
  • 30-year linear performance guarantee
  • At least 97% of nominal power in the first year
  • Guaranteed maximum performance reduction of only 0.35% per year
  • Guaranteed performance of 90% after 21 years
  • Guaranteed performance of 86.85% after 30 years

The service certificates of our modules are available in our download section.