With over 1 billion people without access to clean water and over 1.4 billion people without access to modem energy services [Alliance for Rural Electrification Webs Site, April 2008; www.ruralelec.org], renewable energy (RE) technologies can play an important role in meeting the needs of these people. Unfortunately many projects which have involved the implementation of RE technologies into the developing countries have failed. This is frustrating for the participants and potentially damaging for the industry. But the technologies work, good quality equipment is available, so why do projects fail? In 1999, international experts came together with the formation of the task -Photovoltaics (PV) Servicing Development Countries within the International Energy Agency's PV Power Systems Programme. Based on many years of in-country experiences these experts developed 8 recommended practice guides (RPGs) on how to implement successful RE projects. This paper provides an overview of what is required to successfully implement RE technologies in developing countries based on the RPGs and the author's experience.