Plug-in electric vehicles (PEVs) available today can help grid operators manage the grid?though few in use do. This is not too much of a problem now, but as more PEVs populate roads, utilities are likely to become increasingly concerned with managing and making use of these mobile assets. Today?s PEVs represent a significant increase in electricity demand that, if unmanaged, could cause problems with distribution-level transformers and could drastically increase demand during peak hours when PEV owners return from work and plug in their vehicles. The effect would force utilities to make upgrades to distribution networks that would likely be passed on in the form of higher rates to consumers. Conversely, PEVs also represent an increase in load that could be used to capture renewable electricity generation and help balance generation with demand, theoretically making electricity marginally cheaper and cleaner. Vehicle grid integration (VGI) technologies, which have been in development since before the Volt and LEAF were first sold in the Unites States, are designed to accomplish this purpose. Now that the market for PEVs has begun to firm with global sales surpassing 320,000 in 2014, pilots testing VGI technologies are emerging with greater frequency. According to Navigant Research, PEVs participating in VGI services are expected to provide nearly 4.2 GW of power to grids globally by 2024 under an aggressive scenario. This Navigant Research report analyzes the market opportunity for VGI technologies to be used to support grid reliability and stability. The study considers various policy factors associated with the growth of VGI, as well as significant market drivers and barriers. Global market forecasts for V2X-enabled PEVs and VGI capacity and revenue, segmented by region, category, and scenario, extend through 2024. The report also examines the major VGI technologies and case studies and profiles key market participants.