I have a batch of 6 Old solar panels seemingly no longer working on the roof. they where inspected a while back and claimed to have "microcracks" . these panels are about 12 years old

They total 1.5kw worth. I have been looking at a supplier of 500w solar panels that i can get relatively cheaply on their own using the existing inverter. the inverter is a Delta 2.5kw inverter.

Can old solar panels be fairly easy to remove from their rails and swapped out with newer panels? I was looking at the solar production on this inverter when the sun is on those panels the inverter is producing 100w.