From the perspective of the entire power system, the application scenarios of energy storage can be divided into three major scenarios: generation-side energy storage, transmission and distribution-side energy storage, and user-side energy storage. These three scenarios can be divided into energy-based demand and power-based demand from the perspective of the power grid.

1. what is user-side energy storage?

We usually say that user-side energy storage mainly refers to the application of electrochemical energy storage in the majority of industrial and commercial customers, energy storage equipment can be simply understood as a large charging treasure. Charge at low electricity prices, and discharge at high electricity prices for business production, thereby reducing the cost of electricity for enterprises.

2. what are the benefits of installing energy storage systems?

(1) Shaving peaks and filling valleys: utilizing the difference between peak and valley electricity prices, charging in the valley and flat period, discharging in the peak period and sharp peak period, reducing the cost of electricity for enterprises.

(2) Balancing demand charges: The energy storage system can cut peaks and fill valleys, eliminate peak loads, smooth the electricity consumption curve ,and reduce demand charges.

(3) Dynamic capacity increase: the user’s transformer capacity is fixed, usually when the user needs the transformer in a certain period overload operation, the need for transformer capacity expansion. After installing a matching energy storage system, the transformer load can be reduced by discharging energy storage during that time, thus reducing the transformer capacity increase and transformation costs.

(4) Demand-side response: after installing the energy storage system, if the grid issues a demand response, customers can not limit power, do not have to pay the high cost of electricity during the period, but may participate in the demand response transactions through the energy storage system, to obtain additional compensation fees.

3. What are the main application scenarios of customer-side energy storage?

User-side energy storage is mainly applied to charging stations, industrial parks, data centers, communication base stations , and other objects that use electricity regularly.

4. About user-side energy storage investment, construction, and operation revenue mode?

(1) The integrated operator invests, builds ,and operates the system, and the customer does not need to pay a penny, but only needs to provide a site for the construction of the energy storage system, and the gain is shared between the integrated operator and the user.

(2) Both parties share the revenue, the specific revenue share according to the customer’s electricity consumption, and energy storage scale size for negotiation.

(3) The user invests and builds the energy storage system by himself, and the integrated operator is responsible for the operation and commits to the customer’s revenue.

5. What is the floor space of the energy storage plant?

The floor space of a 1MWh energy storage plant is about 10 square meters, or 20-30 square meters if the safety distance between front and back is considered.

6. What are the site requirements for installing an energy storage plant?

(1) The site is located outdoors, and there is no dangerous chemical warehouse within 20 meters.

(2) The site is as close as possible to the power distribution room, and the distance from the power distribution room should not exceed 100 meters.

7. Does the installation of an energy storage power plant require the assistance of the owner to complete the formalities?

Installation of energy storage power plant needs to be filed in the local development and reform bureau website, this procedure is the responsibility of the integrated operator, the owner only needs to cooperate with the information provided.

8. How long is the construction period of the energy storage plant? Is it necessary to disconnect the power? How long does it take to disconnect?

After the formalities are completed, the official construction cycle is about 1-1.5 months; a short power cut is required for the installation of grid-connected cabinets, and the shortest power cut time is about 2 hours.

9. Who will be responsible for the operation and maintenance of the energy storage plant after completion? Is it necessary to involve personnel from the owner’s side?

For customers who choose an integrated operator, the integrated operator will be responsible for the operation and maintenance of the energy storage power plant after completion, and will generally provide simple training to the owner’s staff, and provide solutions to deal with special circumstances.

10. Does the energy storage plant increase the owner’s basic electricity bill?

No, it will not. If the billing is based on capacity, the basic electricity cost is fixed. If the billing is based on demand, there is also a possibility that the maximum demand will be reduced due to the load borne by the energy storage discharge, thus lowering the basic tariff.

The energy storage capacity design, has taken into account the capacity of the transformer and the load, not because of energy storage charging to pull up the demand, if it pulls up the demand, the energy management system (EMS) will automatically identify and stop the energy storage charging.

11. Is the metering of the energy storage plant accurate?

Yes, all the meters installed are meters that meet the requirements of national standards and have passed the test.

12. Who is responsible for the safety problems of the energy storage power station?

If Party A’s equipment fails or is destroyed or lost due to Party B’s equipment, Party A will compensate for the loss suffered by Party B. At the same time, Party B will be responsible for the safety of the storage power station during the performance of the contract. At the same time, Party B is responsible for ensuring the machine damage insurance and property insurance related to the project during the performance of the contract, and bears the insurance premiums, and the insured amount of property insurance should be not less than the actual value of the insured property.