In photovoltaic power generation, the principle of \"using the power generated locally first and feeding any surplus to the grid\" means that the load consumes the power first, with any excess being sent to the grid

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The last edit to this post was made by It will be more tomorrow_bZzMU on 2020-2-14 at 21:21. Photovoltaic power generation can be divided into 3 categories based on the way in which electricity is used: 1. All electricity sold to the grid: The electricity generated is sold entirely to the power grid, which is advantageous for the person in question, as the grid provides subsidies for distributed photovoltaic power generation; the cost is usually a little over one yuan per kilowatt-hour； 2. Entirely for own use: All the electricity generated is used by the same entity, which makes it suitable for remote areas or those with unstable power supply. The electricity produced can be stored if needed, or it can be wasted. 3. For self-use; excess power generated by photovoltaic systems is fed into the grid: The electricity produced is first used for personal needs, and any surplus is sold to the grid. Most household distributed power generation uses this model. This is also the original intention behind distributed photovoltaic power generation: to reduce line losses and carbon emissions, as well as to increase the capacity of the power grid without the need to replace electrical equipment. Since the questioner has installed a two-way meter, it must be the third electricity usage method. The electricity generated by photovoltaic projects is first used by the users themselves, and only the excess electricity that they do not consume is sent to the power grid company. Typical photovoltaic systems are equipped with two meters: one is installed in the customer’s incoming cable box and measures power in both directions, allowing it to track the amount of power supplied by the grid to the customer as well as the amount of power sent back from the customer to the grid ； The other is installed on the photovoltaic generation side; it is usually a unidirectional meter used to measure the amount of electricity generated by the photovoltaic system. The grid company’s purchase refers to that portion of electricity delivered by users to the grid.