Just like there is no "best fruit", there really isn't an overall "best solar panel". The solar panel that will work best for you depends on the environment, placement, warranty, & size. Most solar panels are warrantied by the manufacturer for 20+ years to produce up to a certain percentage of their original efficiency.
If you're considering the best solar panels to get the most out of your solar installation, it's best to engage an experienced consultant or solar firm to evaluate your circumstances and help you make that choice.
Simpleray is a top solar installer in the Midwest and beyond. We can recommend solar modules & design an installation that will get you the best value for your situation.