Method for determining installation number of household photovoltaic modules, household photovoltaic system and medium

The invention relates to the technical field of photovoltaic control, in particular to a method for determining the installation number of household photovoltaic modules, a household photovoltaic system and a medium. The method comprises the following steps: acquiring a load curve associated with a transformer and a historical load minimum value in historical load values recorded in a preset duration interval; determining the current downlink power of the transformer according to the rated uplink power of the transformer and the historical load minimum value; and based on the current downlink power, determining the corresponding maximum installation number of the household photovoltaic modules under the transformer. As the offset of the load to the power in the photovoltaic system is considered, the obtained maximum installation number is greater than the original initial maximum installation number determined based on the rated power, and the effect of improving the installation rate of the household photovo