Cognizant of the growing popularity of solar photovoltaic (PV) installations amongst residential dwellers as well as building developers, and the corresponding demand for a comprehensive set of technical and regulatory. We would like to thank the following organisations for their support and contributions in the development of this handbook: Grenzone Pte Ltd Phoenix Solar Pte Ltd. Deputy Chief Executive Energy Planning and Development Division Energy Market Authority Director Centre of Sustainable Building & Construction Building and Construction Authority The sun delivers its energy to us in two main forms: heat and light. There are two main types of solar power systems, namely, solar thermal systems that trap heat to warm up.