Doing some digging on USVI electricity. It seems to be mostly locally generated from oil, coal and natural gas.
Dept of Energy info page on USVI: https://www.eia.gov/state/?sid=VQ
Virgin Islands Water and Power Authority (WAPA) July 2019 production report: http://www.viwapa.vi/customer-service/megawatt-hours-production-report
From ‘About Us’...
“Today, WAPA produces electrical power at plants on St. Thomas and St. Croix and distributes electrical service through smart grids to customers on St. Thomas, St. Croix, St. John, Hassel Island, and Water Island.”
This tweet stayed up for about 15 minutes. Gone now. I screencapped for posterity. Probably would have been up longer if a couple thousand hadn't reported him for violating twitter policy. Top Kek!
Censored for posting. 
I wonder if @Jackwagon kept his DMs? I wonder if the "compromisers" found out his 'other' twitter accounts?
doesn’t say LSJ island but maybe because it is private. If so JE probably did have a backup genset.