KOSTAL Pressebereich


KOSTAL extends its warranty promise to 10 years for all inverters up to 20 kW free of charge

The KOSTAL warranty: Simple. Guaranteed. Peace of mind.

10-year warranty for all KOSTAL inverters up to 20 kW


KOSTAL inverters are first-class and reliable quality products that are developed, tested and produced for many years of continuous use. With 110 years of experience in electronics and mechatronics, the KOSTAL brand is synonymous with "Made in Germany". 

The company-wide zero-error approach applies to every KOSTAL inverter. This is reflected in the high demand for KOSTAL inverters throughout Europe and explains why KOSTAL inverters are popular with plant owners, installers and specialist partners alike.

KOSTAL Solar Electric is now extending its warranty for all inverters up to 20 kW to 10 years. This underlines KOSTAL's market-leading quality approach. After purchasing the inverter, simply activate the Smart Warranty in the KOSTAL Solar Webshop and receive the full KOSTAL warranty. Afterwards, log in to the KOSTAL Solar Portal.


KOSTAL Solar Electric will introduce the Smart Warranty plus with commissioning on 1 April 2022. The Smart Warranty plus covers all the inverter components as well as the costs of replacement during the first 5 years after commissioning. In addition, it includes a material warranty from the sixth year of operation. This means that, including the statutory warranty, the new Smart Warranty plus provides a total warranty period of 10 years.

The Smart Warranty plus applies to all inverters of the PIKO MP plus, PIKO IQ, PLENTICORE plus, PIKO 12-20 and PLENTICORE BI series with a power rating of up to 20 kW.

The Smart Warranty plus starts when the warranty is activated in the KOSTAL Solar online shop. The warranty is activated for KOSTAL customers in just a few clicks and is free of charge. The warranty can be easily activated up to 6 months after commissioning in our KOSTAL Solar online shop (Warranty > free Smart Warranty activation). You will receive the warranty certificate immediately by e-mail.

New: 10-year warranty for the PIKO MP plus
New: 10-year warranty for the PLENTICORE / PIKO IQ series
New: 10-year warranty for the PIKO 12-20

Peace of mind

KOSTAL customers can also expect the best in the event of a warranty claim. The repair or exchange service is simple and transparent. The KOSTAL service and the certified KOSTAL installer as well as the KOSTAL specialist partners handle all the processing work for you.

The KOSTAL warranty: Simple. Guaranteed. Peace of mind!

Three steps to obtain your KOSTAL warranty

Step 1: Log on to the KOSTAL Solar Webshop 
Step 2: Enter system and location data
Step 3: Activate warranty

Job done! 

With KOSTAL Smart Warranty plus, KOSTAL customers get up to 10 years of individual protection and maximum peace of mind.

Important: For the Smart Warranty plus, you must also register in the KOSTAL Solar Portal.

Click here for activation.