Photovoltaic heat supply system

The utility model discloses a photovoltaic heat supply system. The system is characterized in that the solar heat collector, the phase change energy accumulator, the solar heat exchanger, the input end of the heat conduction oil circulating pump and the heat conduction oil circulating pump form a heat conduction oil loop; a primary net water supply outlet of the solar heat exchanger is communicated with a primary net water supply inlet of the first heat user heat exchange station through a primary net water supply pipe, and a primary net water return outlet of the first heat user heat exchange station is communicated with a primary net water return inlet of the solar heat exchanger through a heat supply circulating pump. A secondary network water supply outlet of the first heat user heat exchange station is communicated with a secondary network water supply inlet of the second heat user heat exchange station through a secondary network water supply pipeline; and a secondary net backwater outlet of the second