Photovoltaic weak current eliminating circuit and energy storage power supply

A photovoltaic weak current eliminating circuit includes a discharge triggering module, a locking module, a discharge unlocking module and a discharge module. When output voltage of the photovoltaic input source is greater than a preset voltage, the discharge triggering module outputs a first control signal that is kept by the locking module to control the discharge module to discharge the energy of the photovoltaic input source. Accordingly, the stability of the energy storage power supply can be improved. After the discharge module operates, the discharge unlocking module controls the discharge triggering module to output a second control signal if the output voltage of the photovoltaic input source is greater than the preset voltage, so as to stop the operation of the discharge module. Accordingly, the utilization ratio of the photovoltaic input source can be improved.