Product Warranty
This covers faults in the panel itself, like damage or wear that shouldn't happen under normal use. Expect 25 to 30 years, some times linked to installer status with that manufacturer.

Questions people asked me
What does a solar panel product warranty usually cover?
Solar panel product warranties cover manufacturing defects like faulty internal components, glass breakage from internal flaws, delamination, and structural frame problems. They don't cover external damage from weather, impact, vandalism, or normal wear and tear.
Is panel damage from weather or animals covered under warranty?
Solar panel warranties don't cover weather damage like hail or storm damage, or animal interference. They only cover manufacturing defects and performance guarantees. You need separate home insurance coverage for weather and wildlife damage protection.
What happens if a panel fails within the warranty period?
When solar panels fail within warranty, contact your installer who typically handles claims. You'll need purchase receipts, installation certificates, and problem documentation. Manufacturing defects are covered, but you usually pay labour costs of £300-800 for replacement.
Does the installer affect the length of the product warranty?
Your installer doesn't directly affect your solar panel product warranty length, but they can impact warranty validity. Manufacturers often require certified installers to maintain warranties, and uncertified installation may void your coverage entirely.
What's the difference between a performance and product warranty?
Product warranties protect against manufacturing defects and physical damage for 12-25 years. Performance warranties guarantee power output won't degrade below 80-90% of original capacity over 25-30 years. Both protect different aspects of your solar investment.
Can I transfer my solar panel warranty if I sell my house?
Yes, you can transfer solar panel warranties when selling your house. Most UK solar warranties are designed to be transferable, making your property more attractive to buyers and potentially increasing its value through proper documentation and timely notification.