H.R.3878 - Federal Government - To authorize the National Science Foundation to accept and use contributed funds from the Department of Energy for certain activities related to the Energy for Sustainability program.

Authorizes the National Science Foundation (NSF), in carrying out its Energy for Sustainability program, to accept and use funds contributed by the Department of Energy (DOE) from the Energy Efficiency and Renewable Energy program, to support projects that enable related research and development activities within those programs. Requires the Director of the NSF to consult with the Assistant Secretary of Energy for Energy Efficiency and Renewable Energy when preparing solicitations for such projects.