Datacenters largely have fixed power needs; the computers are going to be running constantly, or else they aren't making money for their capitalist overlords. What you want is something located at the solar arrays themselves, so that you can selectively switch whether the juice is going to the grid or to your power sink - and the power sink ideally should be something that also makes you money, but doesn't need to run 24/7 to do so. Like a crypto farm.