In the first section, geothermal energy, heat pump technology and different types of heat pumps are presented. There is a discussion and analysis of heat pump components and their performance as well as discussions about solar energy and different solar collectors and their components. The use of solar collectors and ground source heat pumps for domestic hot water and space heating have been considered as well. Towards the end, several configurations of ground source heat pumps with solar collectors such as Parallel, Series and regenerative have been presented and been analyzed. Seasonal performance factor (SPF) increase in a Parallel integration where solar collectors use for providing DHW and space heating, especially in summer time. Ground regeneration configuration is not recommended for single borehole, because it has only a small effect and it is not economically advantageous.