Solar district heating networks use large areas with solar thermal collectors as a heat source. The concept is also known as solar district heating (SDH). The newly released Solar Heat. This year's report includes dedicated chapters on two growing technologies, Photovoltaic Thermal (PVT) and PV generated heat (PGH) systems. A new set of infographics highlights some of the key data from the report and are available for download. What is solar district heating? Solar district heating. A solar power tower at Crescent Dunes Solar Energy Project concentrating light via 10,000 mirrored heliostats, occupying an area of 13 million sq ft (1. Concentrated solar power (CSP), also called concentrating solar power or concentrated solar thermal, involves systems that collect solar. In the Earth's sunbelt, solar thermal power plants with thermal storage systems enable the cost-effective and sustainable provision of electricity and heat even after sunset or at times of high demand. While CSP has developed to a commercial scale, up to now it has played a small role in.