This workshop will focus on issues related to energy harvesting communications. First, for wireless sensor networks, which operate at ultra-low-power, the small wireless autonomous sensors can be powered by harvesting ambient power that is scavenged in milliwatts or even microwatts. If these wireless sensors, deployed throughout a home or factory, in-building or even outdoors to monitor all kinds of environmental conditions, are powered by energy harvesting, there are no batteries to replace nor labour costs associated with replacing them, making them self-sustainable. However, the design of communication systems has to take into account the fluctuating and often unpredictable availability of energy source. Next, in a cellular network, energy harvesting can be used to provide power in many elements of a telecom network, saving considerable costs in electricity supply and providing low maintenance monitoring. Powering mobile phone base stations with wind or solar power allows telecom networks to expand beyond the limits of the power grid. The possibility of re-distribution of the renewable energy in smart grids allows further efficient utilization, but leads to many challenges as well. Another important focus of this workshop is on RF energy harvesting. RF energy is currently broadcasted from billions of radio transmitters around the world, including mobile telephones, handheld radios, mobile base stations, and television/radio broadcast stations. The ability to harvest RF energy, from ambient or dedicated sources, enables wireless charging of low-power devices and has significant benefits to product design, usability, and reliability. Fundamental practical issues on realizing this ability lead to many interesting research problems. This workshop considers energy harvesting related issues in communications. We especially welcome research work that pushes theory to practice, such as theoretical work with emphasis on how to solve practical problem, experimental work on new systems, and system-level considerations for practical deployment. The workshop solicits state-of-the-art technical papers that were not previously published and are not currently under review for publication elsewhere.