The loan and grant agreement is for the Vanuatu Energy Access Project.
The ADB's James Lynch said the project will deliver an increased supply of clean, renewable electricity to households in Malekula and Espiritu Santo and have a positive effect on rural livelihoods.
RNZI reports about 75 percent of Vanuatu's population lives in rural areas and have limited access to electricity nationwide, with the electrification rate at just 33 percent.
Where electricity is available, it is mostly generated from diesel and other fossil fuels.