This slide (Source: Jan W. Bleyl, 2009) summarizes what an Energy Service Company (ESCo) is by explaining what it does for its clients. The ESCo integrates the various Technology vendors and contractors offerings using its professional Know-How and design expertise to provide suitable energy Supply (Mega-Watt Hours) or Savings (Nega-Watt Hours) solutions for its clients based on their particular needs and contexts. These solutions are also based on available Energy Sources / Carriers, the current Legislative and regulatory frameworks in place and finally incorporating the best Finance options available, including incentives. The client need only be concerned about the energy Supply or Savings provided by the ESCo which comes with Functional, Performance and Price guarantees. The risk of dealing with the various other stakeholders and managing the energy solutions themselves are largely taken over by the ESCo being the specialists in this field.