Vision de l'entreprise : Facturer pour un avenir durable
Why is the Charging Station Equipped with Energy Storage?
How to make money ?
- Peak-valley A rbitrage
Charge during the off-peak period when the electricity price is low and discharge during the peak period when the electricity price is high, and earn the price difference in this way. This method requires a large peak-to-valley price difference, such as a peak-valley price difference of RMB 1/hour, and a high discharge capacity to maximize the profit.
- 2 Grid Connection and Consumption of New Energy
Combined with photovoltaic power generation and energy storage system, the electricity generated by photovoltaic power generation is stored and released when needed to improve the utilization rate of new energy.
- Power Distribution Capacity Expansion
When the user's electricity demand exceeds the original transformer capacity, the energy storage system can charge quickly to meet the load's electricity demand and reduce the transformer's use cost.
- Using the Energy Storage System to Achieve Capacity Management and Reduce Electricity Fees
Store electricity during the low electricity load period and release it during the peak period, thereby reducing peak power and maximum demand, reducing the maximum demand power of enterprises, and further reducing the basic electricity price and overall electricity fee.
- Market-oriented D emand - side R esponse
When electricity consumption is tight, enterprises can take measures to reduce electricity consumption to balance the relationship between supply and demand and obtain economic compensation. By using the user-side energy storage system, enterprises can get corresponding incentive prices or subsidies.
- Electricity T ransaction
In addition to charging service fees for providing charging services, energy storage equipment can also be used for electricity transaction. For example, store electricity when the electricity price is low and sell the electricity to the power grid or other users when the electricity price is high to earn the price difference.
How to Calculate the "Energy Storage Account" of Charging Stations
According to the calculation formula of energy storage income [Peak-valley price difference per kWh * Discharge volume * Number of years], it can be seen that the core variables affecting energy storage income include peak-valley price difference and the charging volume that can be discharged during peak hours. The size of the peak-valley price difference directly affects the revenue per kWh of energy storage, and the discharge volume mainly depends on the operating capacity of the charging station.
According to the estimation of experts in the industry, the total cost of building a small industrial and commercial energy storage station with a capacity of 200 kWh, including equipment and construction costs, is about RMB 150,000. Assuming that during the operation period, the station can achieve at least one charge and one discharge per day, with a total of about 170 kWh of electricity. Considering that the peak-valley electricity price difference is RMB 0.7 yuan, the daily income is about RMB 119. In the case of 330 days of effective utilization in a year, the annual income can reach RMB 39,300, and it can be recovered in less than four years.
"Energy Storage System" to Become the "Standard Configuration" of Future Charging Stations
With the continuous development of fast-charging technology, the accelerated launch of fast-charging vehicles and the users' increasing demand for DC fast-charging service, the supply focus of public charging piles is gradually shifting towards DC fast charging piles, and the market demand for DC fast-charging piles is expected to grow further. However, this will also bring great challenges to the power grid.
The instability of renewable energy has always been a bottleneck in its development. Energy storage charging station achieve stable energy output by storing excess energy, providing feasibility for the large-scale application of renewable energy. The new energy storage power system is vividly likened to a "reservoir". On the one hand, it can effectively absorb new energy electricity; on the other hand, it has the characteristics of quick response and long-term output capabilities, and is expected to become the main supporting force for grid frequency modulation, providing sufficient flexibility for the new power system. For charging stations, energy storage equipment not only plays an important role in attracting and retaining users, but also can achieve diversified profitability by skillfully using peak-valley electricity prices. When the load is low, the energy storage battery is charged at a lower electricity price; during the peak load period, the energy storage battery supplies power to the load to realize the smooth transfer of the peak load, thus obtaining the benefits of peak-valley electricity price. For major commercial EV charging stations, they can achieve customer acquisition, repeat purchases, and diversified profitability, and at the same time contribute to the stability of the power grid system, which kills multiple birds with one stone and maximizes social benefits..
Epilogue
With the increase of the installed capacity of renewable energy, the peak-valley price difference of electricity price tends to increase gradually. From the perspective of industrial development law and economy, the integrated mode of " photovoltaic-power storage-charging-inspection-service" is a model and technology that will help maximize the utilization of energy resources in the future.
