I-sola-ted solar panels

These are solar panels (I think) … and they are isolated on an island … in the middle of a park lake.
Hmm.
If they are solar panels, I can’t quite compute what they are doing there - unless the electricity generated from them is driving some pumps in the water (?).
If anybody who knows Longton Park (in Stoke on Trent) can tell me the answer, I’d be grateful.

Mind you, we’ve had so many cloudy days recently – with so much rain to go with them – that I doubt much has been processed from these particular panels anyway.