I did not think they had NG there, that's why I asked. Any NG probably has to be imported via LNG tanker.
Correct; this plan hatched a dozen years ago, when African NG was cheaper than US NG. At that point in time, NG would arrive in tankers to a regas plant; it was proposed for GBI well East of Freeport. It would then pipe in gas form to FPL, or maybe even a domestic plant.
Since then, the economics changed, with US making far more NG than it could sell. The need to import NG went to zero.
But, for the citizens of Bahamas, without any change, they are locked in to some of the most expensive power possible. Oil, and diesel.
The comments on underground transmission is valid from a short term $ view. Certainly the technology is there. Canada is sending huge amounts of power undersea from Labrador, thru Newfoundland, via PEI, an even on to the the US NE. But, yes, lots of users on the demand side to make multi-hundreds of km transmission work out.
I'm thinking more of GBI to Abaco and other "close" islands. But a better central point would be NP. btw, Great Abaco gets most power now from GBI via undersea link.
Another great example of very high cost power is Cat Cay. They do have some $ to spend, but most of that is going into local solar.