Many more resources here.

Indexes articles and conference papers in all fields of engineering, including energy engineering and technologies.

The major database to papers in physics. Can be searched together with Compendex.

Key database for science and social science aspects of many sciences, including energy.

Data and reports on power/electricity sectors worldwide, including: thermal, wind, solar, hydro, nuclear, smart grid, geothermal, bio, and ocean.

Easy to use.

Many reports and much data on all forms of energy in these countries.