Both your solar panels and inverters have their own warranties. For PV modules there are two types of warranties: (i) a product warranty, which covers defects on the solar panels. For that, the industry standard is 5-10 years, with selected manufactures offering up to 20 years. (ii) a power output warranty, which covers cases where the power output falls below the guaranteed levels. For that, industry standard is 20-25 years, with selected glass-glass module manufacturers even providing 30 years. Within this period, the under-performing solar panels will be replaced, or the owner gets compensated for the associated losses.  On the other hand, solar inverters are more complex and hence have shorter warranty periods of 5 to 12 years. However, as solar inverters are easily accessible, they can be swapped out when required.