Wind power
I don't understand why the likes of Amazon & Facebook don't have their own massive turbines built off the west coast of Ireland.
God knows, Ireland is a windy place and while they won't be generating power all of the time, they will be most of time.
It's hardly as if these companies are short a few billion.
And while these have little to do with the diesel-powered generators they need as a data-centre-UPS but it would mean that they would be immune to the vagaries of price hikes and there would be a lower chance to put the diesel-powered generators into operation.
And it would make for good PR too.