HouLin Intelligent Engineering Co., Ltd

The current situation of China's energy storage market

Energy storage technology is the core foundation for building the energy Internet and promoting the development of new energy businesses. The bottlenecks of the three emerging industries in the future - new energy grid connection, smart grid and electric vehicles - all point to energy storage technology, with huge market potential.

Energy storage is currently in the initial transitional stage towards commercial application. The energy storage industry will directly improve the distribution of energy supply in time and space, as well as improve the energy structure. It is closely related to the government's reform of the power system. As an industry encouraged by the country for development, in March of this year, the National Energy Administration of China issued the "Guiding Opinions on Promoting the Development of Energy Storage Technology and Industry (Draft for Comments)", which pointed out the direction for the development of the energy storage industry; In April of the same year, it was announced at the 7th China International Energy Storage Conference held in Suzhou that detailed policies to support energy storage would be introduced one after another, and industrial development was expected to enter the fast lane.

Photovoltaic+Energy Storage

The era of photovoltaic parity is bound to arrive, and photovoltaic energy storage is unstoppable

Throughout, the country has highly encouraged and supported the development of distributed photovoltaics. According to the "Notice of the National Development and Reform Commission on Leveraging Price to Promote the Healthy Development of the Photovoltaic Industry" issued in 2013, the electricity price subsidy standard for distributed photovoltaics is 0.42 yuan (including tax) per kilowatt hour. The subsidy standards for distributed photovoltaics have remained unchanged for nearly 4 years and are not included in the quota system. Enterprises and individuals can receive subsidies in a timely manner.

During this period, the benchmark on grid electricity prices for newly built photovoltaic power stations in resource areas of categories one to three were adjusted from the 2013 policy of 0.90 yuan, 0.95 yuan, and 0.90 yuan per kilowatt hour to the 2016 implementation of 0.80 yuan, 0.88 yuan, and 0.98 yuan per kilowatt hour, and finally lowered to the current 0.65 yuan, 0.75 yuan, and 0.85 yuan per kilowatt hour.

With the continuous reduction of benchmark grid electricity prices, the subsidy price for distributed photovoltaic grid connection has remained unchanged for four consecutive years. It can be expected that the subsidy reduction for distributed photovoltaic grid connection is a trend and inevitability, with the ultimate goal of achieving grid parity for photovoltaics. The most direct impact of the subsidy reduction is the increase in electricity costs and the decrease in revenue. The emergence of photovoltaic energy storage is to maximize the revenue of photovoltaic systems.

What are the advantages of "photovoltaic+energy storage"?

Firstly, from a macro perspective, photovoltaic+energy storage can improve the stability of the power system and the integrity of power consumption; However, this perspective seems difficult for the general public to understand.

What we care about is: What are the direct benefits that photovoltaic+energy storage brings us?

The photovoltaic+energy storage system has increased the spontaneous self use rate of users and brought greater benefits

图一 光伏发电系统

This is a schematic diagram of a traditional photovoltaic power generation system. A 5KW system generates 20 kWh of electricity per day, with 10 kWh of electricity supplied to users. The ratio of spontaneous self use is 10/20=50%

图二 光伏+储能发电系统

This is a photovoltaic power generation system with energy storage added. The photovoltaic power generation is also 20 kWh and 10 kWh for users to use. In addition, 4 kWh of electricity is stored in the battery, and when users need it, these 4 kWh of electricity are released for users to use. Therefore, the proportion of self use becomes 4+10/20=70%.

Photovoltaic+energy storage system achieves peak shaving and valley filling, improves self use ratio, and brings greater benefits

The photovoltaic+energy storage system, with peak shaving and valley filling functions, can maximize photovoltaic self use. The system can detect load consumption, charge surplus electricity into the battery during peak power generation, and release supply loads during low power generation periods, thereby increasing the proportion of self use and maximizing user benefits.