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KOSTAL warranty
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The KOSTAL warranty for more peace of mind

Extend the warranty period for your inverter and wallbox free of charge. Activate your device on our online KOSTAL Solar shop.

KOSTAL Smart Warranty

The Smart Warranty extends the warranty period of KOSTAL inverters and wallboxes free of charge. All that is required is a one-time activation on our online KOSTAL Solar shop. Activation is simple and can be completed within the first 6 months after purchase. 


It is that simple:

Step 1: Log in to the online KOSTAL Solar shop
Step 2: Enter system and location data
Step 3: Activate warranty

Done! You will receive the warranty certificate immediately by e-mail.

Real performance - Full service

Our services covered by the warranty include a rapid exchange service to ensure that the PV system concerned is back up and running in no time.            
We will organise the collection of the defective device and we will also cover the freight costs incurred for this.


KOSTAL warranty extension

For our customers who would like to have their inverters protected for even longer, the KOSTAL warranty extension offers an additional extension option. Within the first two years, the warranty period can be extended by a further 5 years from the date of purchase.

The warranty extension can be ordered conveniently via the KOSTAL Solar Webshop - easily and quickly, around the clock and even at weekends. You will receive the warranty certificate just as quickly and easily by e-mail. To be able to order the KOSTAL warranty extension, you must be registered in the webshop and the Smart Warranty option must be activated.

PV planning with KOSTAL

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Perfect solar and storage solutions for your PV system

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