This report is intended to support policymakers who want to accelerate energy access by engaging private-sector participants in developing countries or regions. It focuses on electricity access; for the purposes of this report, the term "energy access" refers to access to electricity and related services rather than cooking fuels or technologies. The authors focus on the use of distributed (or decentralized) electricity options rather than grid extension. While their primary focus is off-grid energy access, they also offer policy information for including distributed electricity as part of the grid. The report consists of an executive summary and two volumes that cover three types of information. The volumes can be read in conjunction with each other, or they can be read separately. The executive summary covers both Volume 1 and Volume 2.