The South Pacific territory - comprising the three atolls of Atafu, Nukunonu and Fakaofo - had been dependent on diesel to generate electricity.
New Zealand, which administers Tokelau, funded a $7m (?4.3m) solar project.
Solar grids were constructed on the three atolls, with the last completed earlier this week.
"The Tokelau Renewable Energy Project is a world first. Tokelau's three main atolls now have enough solar capacity, on average, to meet electricity needs," New Zealand Foreign Affairs Minister Murray McCully said in a statement.
"Until now, Tokelau has been 100% dependent upon diesel for electricity generation, with heavy economic and environmental costs," he added.
Project co-ordinator, and PowerSmart MD, Mike Basset-Smith said that the move represented a "milestone of huge importance" for Tokelau, as it would now be able to spend more on social welfare.
The remote islands of Tokelau lie between New Zealand and Hawaii.
Most of the 1,500 islanders live by subsistence farming, with thousands of others choosing to settle in New Zealand or neighbouring Samoa.
The Zero-Blade Technology is largely inspired from the sailboat and is likely to increase the efficiency of the current wind power conversion devices. The blades are replaced by a sail-shaped body while both hub and gearbox are removed. Instead of spinning the blades' rotor, the wind is being harnessed by a sail which follows a non-rotational back and forth motion. Such movement follows a knot path and allows the conversion of the majority of the kinetic energy into mechanical energy (using pistons). The same is then converted to a hydraulic pressure that could either be stored (in hydraulic accumulator) or instantly converted to electricity via a hydraulic motor and a generator. Thanks to the aerodynamic shape of the Saphonian, the drag force becomes the driving force of the system while the lift force becomes almost nil.