Hunan Dongxin Group, founded in 1999, is a large privately-owned enterprise with 3,000 employees and 400,000 spindles. The company adheres to a product positioning of "high-end, specialty, and scale," focusing on the production of high-grade knitted yarn, core-spun yarn, slub yarn, and other series of products. Using high-quality Xinjiang cotton, American cotton, and environmentally friendly specialty differentiated fibers, it has an annual yarn output of 90,000 tons. The company consistently pursues a business philosophy of "high-quality products, differentiated products, high-tech technology, and scientific management." It is one of the largest slub yarn manufacturers in China, and its patented product JVC enjoys high prestige in the domestic textile market.

I. Reducing Electricity Costs (Direct Economic Benefits)

1.1 Peak-Valley Arbitrage:

Hunan implements a time-of-use electricity pricing policy (peak, flat, and valley). Energy storage can charge at a low price during the valley period and discharge for self-use during the peak period, reducing high-priced electricity expenses.

1.2 Demand Charge Management:

Energy storage can smooth out the peak factory power load, reducing the maximum demand power and demand charges.

II. Ensuring Stable Power Supply (Reliability Improvement)

2.1 Emergency Backup Power:

During periods of tight electricity supply or sudden power outages in Hunan during the summer, energy storage can serve as a backup power source, ensuring the uninterrupted operation of key production equipment and reducing production losses.

2.2 Voltage/Frequency Support:

Energy storage can quickly respond to grid fluctuations, improving the power supply quality of the park and preventing damage to precision equipment due to voltage drops.

III. Supporting Green Transformation (Policy and Brand Value)

3.1 Green Electricity Consumption:

If the park is equipped with photovoltaic power generation, energy storage can store excess green electricity, increasing the proportion of self-generation and self-use (peak photovoltaic power generation in Hunan is at noon, which may mismatch with the peak factory power consumption).

3.2 Carbon Emission Optimization:

Reducing the amount of electricity purchased from the grid (especially thermal power), helping enterprises achieve their "dual carbon" goals and improve ESG ratings.

3.3 Policy Subsidies:

Hunan may provide subsidies for user-side energy storage projects (for example, Changsha once provided a subsidy of 0.3 yuan/kWh for integrated photovoltaic and storage projects), or priority participation in demand response (subsidies of approximately 200-500 yuan/MW·time).

The Zhangjiajie Municipal Bureau of Industry and Information Technology is a newly established unit in Zhangjiajie's institutional reform.

I. Reduce enterprise electricity costs and enhance industrial competitiveness

1.1 Peak-valley arbitrage: Zhangjiajie implements Hunan's time-of-use electricity pricing (peak 1 yuan/kWh, valley 0.3 yuan/kWh). Energy storage can charge during low-price periods and discharge during high-price periods, reducing enterprise electricity expenses.

1.2 Demand charge optimization: Microgrids can smooth industrial loads, reducing peak demand charges (demand charges can account for up to 30% of electricity costs for large industrial users).

1.3 Self-use of photovoltaic green electricity: If equipped with rooftop/open space photovoltaics, it can further reduce the purchase of electricity and lower the cost per kilowatt-hour.

II. Ensure power supply and enhance industrial stability

2.1 Power supply guarantee during peak tourist season: During peak tourist seasons in Zhangjiajie (such as summer and national holidays), electricity demand surges. Microgrids can alleviate pressure on the power grid and avoid power outages affecting production.

2.2 Emergency backup power capability: For enterprises such as precision manufacturing and food processing, microgrids can provide backup power, reducing losses from power outages.

III. Promote the green transformation of industry and meet the "dual carbon" goals

3.1 Reduce carbon emissions: Photovoltaic + energy storage replaces thermal power, reducing the carbon footprint in the industrial sector and contributing to Zhangjiajie's positioning as an ecological tourism city.

3.2 The Bureau of Industry and Information Technology can strive for national/provincial demonstration projects for "green factories" and "zero-carbon parks".

Xiangtan Comprehensive Bonded Zone was approved by the State Council on September 7, 2013. It is the 32nd comprehensive bonded zone to be approved and the largest in Hunan Province. Located in the national-level Xiangtan Economic and Technological Development Zone, its boundaries are: south to the Shanghai-Kunming High-speed Railway, north to Shatang Road, west to Xiangshui Avenue, and east to the Changtan West Line Expressway. The planned total area is 3.12 square kilometers, with the first phase covering approximately 1.62 square kilometers (2430 mu) and the second phase approximately 1.5 square kilometers (2250 mu). The total investment in the bonded zone is estimated at 3.679 billion yuan. It comprises four functional zones: a bonded processing zone, a bonded logistics zone, a customs clearance zone, and a comprehensive service zone. It has two checkpoints (main and secondary) and features various functions of an international port, including bonded warehousing, customs, commodity inspection, and quarantine.

I. Reduce enterprise electricity costs and improve energy efficiency

1.1 Photovoltaic power generation for self-use: Electricity generated by the carport photovoltaic system can be used by enterprises within the bonded zone, reducing the purchase of high-priced electricity from the grid (Hunan's industrial and commercial electricity prices have a large peak-valley difference; photovoltaic power generation can replace high-priced electricity during peak hours in the daytime).

1.2 Energy storage peak-valley arbitrage: Combined with Hunan's time-of-use electricity pricing policy (peak: 1 yuan+/kWh, valley: 0.3 yuan/kWh), the energy storage system charges during off-peak hours and discharges during peak hours, further reducing electricity costs.

1.3 Demand charge management: Energy storage can smooth out the peak load of the park's electricity consumption, reducing the maximum demand charge (the demand charge for large industrial users can account for more than 30%).

II. Improve power stability and ensure the operation of critical businesses

2.1 Emergency backup power: Enterprises in the bonded zone (such as precision manufacturing and cold chain logistics) have high requirements for power stability. The photovoltaic and energy storage system can provide backup power in the event of a grid failure, preventing production interruptions.

2.2 Power quality optimization: Energy storage can quickly respond to voltage fluctuations, ensuring the stable operation of sensitive equipment (such as automated production lines and data centers).

III. Promote green and low-carbon development and comply with policy guidance

3.1 Reduce carbon emissions: Photovoltaic + energy storage replaces traditional thermal power, helping the bonded zone achieve its "dual carbon" goals and improve its ESG rating.

3.2 Policy subsidies: Xiangtan City encourages the application of new energy and can apply for local government funding support for photovoltaic and energy storage demonstration projects.

IV. Optimize park infrastructure and enhance investment attraction

4.1 Charging pile supporting facilities: Meet the charging needs of new energy vehicles (logistics vehicles, employee private cars) in the park, and improve the park's supporting service capabilities.

4.2 Intensive land use: Photovoltaic carports make full use of parking lot space, achieving "two uses of one land" and improving land use efficiency.

Hunan Meini Supermarket Co., Ltd. is a retail chain enterprise. Currently, it has branch companies or subsidiaries in Changsha, Zhangjiajie, Changde, Xiangxi Autonomous Prefecture, etc. The company's first store was opened in Zhangjiajie City in 1998. After more than ten years of development, it has become a large commercial retail enterprise in the commodity circulation field in Northwest Hunan. The company currently has 35 operating stores, with a total operating area of more than 300,000 square meters, and an annual sales revenue of 1.5 billion yuan.

I. Reduce electricity costs and improve economic efficiency

1.1 Peak-valley arbitrage:

Hunan implements time-of-use electricity pricing (peak electricity prices can be more than three times higher than off-peak electricity prices). The energy storage system can charge during off-peak hours (around 0.3 yuan/kWh) and discharge during peak hours (over 1 yuan/kWh), significantly reducing electricity costs.

Case study: Supermarkets typically have peak electricity consumption during the day (air conditioning, lighting, etc.). Energy storage can cover this high-priced electricity demand, saving an estimated 20%~40% on electricity costs.

1.2 Demand charge optimization:

Supermarkets have fluctuating electricity loads (e.g., peak passenger flow during holidays). Energy storage can smooth the load curve, reduce the peak demand power, and reduce demand charges (demand charges for large and medium-sized commercial and industrial users in Hunan can account for up to 30%).

1.3 Photovoltaic self-generation and storage peak regulation:

If equipped with rooftop photovoltaics, the microgrid can store excess green electricity for use at night or on cloudy days, improving the green electricity consumption rate (Hunan's solar resources are generally average, but photovoltaic + energy storage can still reduce grid electricity purchases by 10%~30%).

II. Ensuring the stability of power supply

2.1 Emergency backup power:

Supermarkets have high requirements for power continuity (e.g., cold chain storage, cash register systems). The microgrid can seamlessly switch during power outages, avoiding spoilage of fresh goods or losses due to business interruption.

Case study: During the summer power rationing in Hunan in 2022, supermarkets equipped with energy storage could maintain the operation of key equipment for 2~4 hours.

2.2 Voltage/frequency support:

Energy storage can quickly adjust power quality and prevent damage to precision equipment (such as cold chain compressors) due to voltage fluctuations.

III. Green transformation and policy benefits

3.1 Carbon emissions and ESG improvement:

Microgrids reduce reliance on thermal power, reduce corporate carbon footprint, are in line with Hunan's "dual carbon" policy orientation, and enhance brand image (especially for environmentally conscious consumers).

3.2 Policy subsidies and benefits:

Hunan energy storage subsidies: Changsha and other places have provided subsidies of 0.3 yuan/kWh for integrated photovoltaic and storage projects.

Demand response benefits: Participating in grid peak regulation can obtain compensation (the highest standard in Hunan in 2023 is 4 yuan/kWh).

Green electricity trading: In the future, green electricity indicators can be sold or carbon emission reduction benefits can be obtained.

IV. Business model innovation

4.1 Charging piles + energy storage linkage:

If the supermarket is equipped with charging piles (such as parking lots), the microgrid can optimize the charging load, reduce the cost of grid expansion, and even increase revenue through charging services.