How to calculate the photovoltaic energy storage battery
2025-07-04
In the photovoltaic energy storage battery system, it is crucial to scientifically calculate the combination of photovoltaic and energy storage batteries. So how should they be calculated? Next, Bonada takes the factory power consumption scenario as an example to analyze it in detail.
Suppose the power load power of a factory is 100 kilowatts and the power consumption time during the day is 10 hours. According to the relationship between power and time, it can be concluded that the power consumption of the factory in one day is: 100 kilowatts × 10 hours = 1000 kWh. However, when actually configuring the energy storage battery, it is not to directly match the energy storage capacity of 1000 kWh, but to seek the most economical and affordable solution. The installation capacity of photovoltaics also needs to follow this principle.
For example, the average duration of photovoltaic power generation is about 4 hours. In order to meet the factory's electricity demand of 1,000 kWh per day, the power generation per hour must reach: 1,000 kWh ÷ 4 hours = 250 kW, which means that the capacity of photovoltaic power generation should be above 250 kW.
It is worth noting that during the 4 hours of photovoltaic power generation, the factory equipment is in a state of charging and consuming electricity. Assuming that the equipment consumes 400 kWh of electricity in these 4 hours, the amount of electricity that needs to be stored in the energy storage system is: 1,000 kWh - 400 kWh = 600 kWh. Considering that the factory equipment may increase in the future and the electricity consumption is uncertain, configuring an energy storage cabinet of about 600 kWh is a more economical choice, which can effectively meet the needs of photovoltaic energy storage.
Through this calculation process, do you have a clearer understanding of the calculation method of photovoltaic energy storage?
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