This guide addresses the challenge of meeting the small-scale energy needs of ICT installations in rural and remote areas where there is insufficient access to high-quality, reliable electricity to meet the needs of the ICT installation. Compared to the use of ICTs in developed countries, the economics of ICT ownership are very different when there is no readily available supply of high-quality electricity, as in the following cases: (1) There is no access to the grid at the desired location and grid extension is unaffordable or unavailable; (2) Access to electricity is intermittent or unreliable, as with community diesel generators operated only in the evenings and electricity grids with frequent and long-lasting outages; (3) Electricity is available but is characterized by extremely poor quality.