That stinks. Here is the wording from my signed contract. It is covered for 20 + 5 additional years. On the flip side I likely paid a LOT more than what you are looking at today ($29K for 8.1KW system).

“System repairs” refers to actions needed to fix your System if it is malfunctioning. System repairs ARE provided by the Installer. If System repairs ARE included, the coverage periods for each hardware component of your System (in years) are: Inverter Warranty: 20 years

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Inverter Warranty After the end of the Manufacturer’s Warranty on your System’s inverter, we warrant that under normal use and service conditions your System’s inverter will be free from defects in workmanship or defects in, or a breakdown of, materials or components, for the remainder of the Warranty Period;

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Extended Limited Warranty The terms of the Limited Warranty (other than the Roof Warranty and Section 2(b)(Performance Guarantee)) will remain effective (the “Extended Limited Warranty”) for five (5) years from the end of the Warranty Period (the “Extended Limited Warranty Period”).