A technology very often used on Pharos IV is the Savonius Turbine:
Savonius wind turbine - Wikipedia, the free encyclopedia
It is very simple, extremely rugged and quite cheap, and it works with ocean
currents just as well as with wind.
On Pharos IV, almost all floaters and ships have some kind of Savonius turbi-
ne as a secondary power production system, and even many seafloor habi-
tats use them.
Savonius turbines are also the type used for the colony's first ocean current
power plant. While their energy output is lower than that of other types of
turbines, the initial costs and the maintenance requirements are much lower,
too.
Due to the weather conditions on Pharos IV, the most common type is the
"flat" one without any kind of mast, approximately like this one:
Forgen Wind Powered Generator
Another technology often used on Pharos IV is Solar Paint:
Swansea University - Latest Research
Since both floaters and SWATH ships usually have large horizontal areas that
are not used very often for other purposes, it seemed a logical idea to use
such "sun decks" for energy production by coating them with solar paint.
Together, Savonius turbines and Solar paint provide just enough energy to
keep the basic life support systems of a floater or ship running in emergency
situations, for example when a cyclone interrupts the energy grid of a floater
settlement (which usually has only one fusion reactor on a separate floater),
or when a ship has to shut down its fusion reactor for some reason.