For the development of renewable energy, countries and regions all over the world have clear plans. China strives to peak carbon emissions by 2030 and achieve carbon neutrality by 2060; the EU is expected to raise its carbon emission reduction target to 60% by 2030, and the corresponding renewable energy consumption target is raised from 32% to more than 40%.

It is estimated that by 2050, renewable energy power generation will become the world’s largest energy carrier, accounting for 86% of the world’s total power generation. Among them, the cumulative installed capacity of photovoltaic will reach 8519GW, accounting for 43% of the total installed capacity of global electricity.

At present, there is a big gap in this goal in many countries, so it is necessary to support enterprises to enter the photovoltaic industry through subsidies, so that its costs will be further reduced, and the development of photovoltaics will be promoted faster.

In addition to reducing costs and increasing efficiency in the photovoltaic module itself, thanks to the continuous reduction of energy storage costs, the combination of photovoltaic + energy storage can also help the development of a higher proportion of photovoltaics. In this regard, the following issues also need to be resolved to continue to reduce LCOE, support the grid, and integrate energy storage. Some solutions are also needed.

Continuously reducing LCOE requires continuous component innovation, system design optimization, and reduction of non-technical costs, such as land management fees, which are very important for photovoltaic development.

Solar+storage+charging integrated system integrates photovoltaic power generation, energy storage, micro-grid control, and electric vehicle charging through an integrated solution. It uses the battery energy storage system to absorb low electricity and supports fast charging during peak periods. It is supplemented by photovoltaic power generation system, which effectively reduces the grid load during peak periods of charging stations, improves system operation efficiency, and provides auxiliary service functions for the grid.

The integrated solution of ” solar+storage+charging ” can solve the problem of power distribution network in limited land resources and insufficient power distribution capacity of charging stations; at the same time, through photovoltaic power generation, 25 years of sustainable economic benefits can be achieved; The energy system fully utilizes the functions of storing energy and optimizing configuration, charging in valleys and discharging in peaks to further reduce charging costs, and can use off-grid operation mode to emergency charge new energy vehicles when the grid fails and power outage; discharge through energy storage , Can reduce the impact on the grid; in addition, it can also reduce the use of traditional energy, reduce polluting gas emissions, and improve energy utilization. In addition to the new energy automobile industry, ” solar+storage+charging ” also helps break the bottleneck of the development of photovoltaic power generation and energy storage industries.

Today, when the world is advocating green travel, it is necessary for ” solar+storage+charging ” to follow the development trend of new energy vehicles and vigorously build. Behind the multifunctional integrated station of ” solar+storage+charging ” is the continuous progress in the development of wind power, photovoltaic, and energy storage, as well as the development opportunities ushered in by “new energy power generation + energy storage”.

Compared with the problems of cost and technology, the grid connected photovoltaic power generation is the main problem. Although the ” solar+storage+charging ” is still in the demonstration stage at present, there should be a large application scenario in the future. With the decrease of battery cost and the continuous improvement of efficiency after technical progress, economic benefits will be gradually generated.

From the commercial point of view, the current ” solar+storage+charging ” still belongs to the category of distributed energy and energy trading. As the core carrier of grid connection and energy trading, State Grid has the terminal and pricing power of grid connection and energy transaction. Since the State Grid has built several “solar+storage+charging “, other relevant parties are also willing to participate.

Although ” solar+storage+charging ” have been put into operation, many people are not optimistic. It still depends on the electric vehicle V2G technology, which is the real big market and general direction. V2G is the abbreviation of Vehicle-to-grid. When the electric car is not in use, the electric energy of the on-board battery is sold to the grid system. If the vehicle battery needs to be charged, the current flows from the grid to the vehicle.

For private car owners’ mobile energy storage, V2G is a very important unit, and the technology is not difficult, but it is too difficult to implement. If everyone is discharging and charging at the same time, it will have a great impact on the distribution and adjustment of grid. In summer and winter, the power grid will run at full capacity, and it is difficult to increase the capacity in many places. V2G will have a great impact on the grid. The demand for charging will definitely increase, and the prospects for new energy vehicles are also good, but there is still a long way to go before becoming a mainstream model.

1. Japan’s energy storage policy

In terms of funding, Japan is committed to providing direct funding for the research and development of energy storage technologies and to subsidizing the costs for the promotion of Energy Storage Technologies, such as the budget of the Ministry of Economy, Trade and Industry (Meti) of Japan of about US $98.3 million, a 66% subsidy to households and businesses that install lithium-ion batteries.

Taking sodium-sulfur batteries as an example, the Japanese government not only provided free financial support in the early stage of research and development, and provided more than 50% of the funds, but also provided support in various aspects including technology, market, and demonstration projects. After it was put into commercial operation, Continue to give subsidies.

In terms of technology, Japan is committed to reducing battery costs and providing battery life. Therefore, it has launched a number of projects for technology research and development, including wind power projects, on-board batteries, stationary energy storage batteries, battery material technology evaluation, etc. The storage involved Energy technologies include lithium batteries, nickel-hydrogen batteries and all-vanadium flow batteries. In 2020, Japan will develop a new generation of storage batteries, and hopes to make production costs 90% lower than lithium batteries through mass production.

2. U.S. Energy Storage Incentive Policies

The U.S. government has given great support to energy storage technology and has positioned energy storage technology as a strategic technology to support the development of new energy. In recent years, the US government has formulated a series of related plans, investment and subsidy policies to support the development of the energy storage industry. The outlook for the US energy storage market remains bright.

At the federal level, the main incentive policies are investment tax credits (ITC) and accelerated depreciation (MACRS). Similar to photovoltaics, the US energy storage system’s incentive policies include investment tax credits (ITC) and accelerated depreciation, mainly for energy storage systems invested by private entities. MACRS allows energy storage projects to accelerate depreciation according to a depreciation period of 5-7 years.

On the other hand, the rise of the energy storage market is largely dependent on the promotion of state-level local governments.

In addition to federal policies, the U.S. state legislative and supervisory agencies have made the deployment of energy storage systems a priority in their energy policy. Each state has also introduced corresponding incentive policies for energy storage. A series of energy storage systems launched by U.S. states in the second quarter of 2019 Policies and measures.

3. China’s energy storage policy: a late start but rapid progress

China’s energy storage industry started late, but developed rapidly. Government departments began to focus on the development of energy storage industry in 2009. National development and Reform Commission, Ministry of science and technology, Ministry of industry and information technology and other ministries and commissions have set up special funds for energy storage industry, which are also reflected in national “863” and “973” scientific research projects.

Since then, with the emergence of foreign advanced energy storage material technology and high-performance battery technology investment boom, China new energy industry market demand has continued to expand. In 2010, the “Renewable Energy Law Amendment” mentioned the development of energy storage for the first time.

The 2016 “13th Five-Year Plan” clearly stated that eight key projects in the energy industry, including renewable energy, energy storage facilities, and key energy technology and equipment, should be promoted, and the R&D and application of solar thermal power generation and large-scale energy storage technologies should be accelerated. The development of the energy storage industry ushered in spring.

4. Inspiration and reference of energy storage incentive policies in the world

In recent years, the relevant policies of the energy storage industry in various countries have mainly focused on the following aspects:

1) In countries or regions where energy storage has not yet been promoted or has just started, the development of energy storage has gradually been incorporated into the national strategic plan, and the government has begun to formulate a development roadmap for energy storage.

2) In countries or regions where energy storage has a certain scale or relatively developed industries, governments often use tax incentives or subsidies to promote energy storage cost reduction and scale applications (especially user-side).

3) In countries or regions where energy storage is gradually participating in the auxiliary service market, the government has opened up regional power markets to achieve multiple values for energy storage applications and provide high-quality service creation platforms.