In 2023, more than 55% of the energy storage and solar power generation facilities deployment

According to the survey research, predicts 2023, more than 55% of the energy storage system with solar power generation facilities deployment. And with the enlargement of the market and development, its system architecture will become an important factor develop solar + energy storage projects.

according to the research Wood Mackenzie Power&Renewables latest survey, dc coupled solar + energy storage projects in grid side ( 英尺分) Applications are becoming more common, and are likely to dominate in the housing market. In addition, although the qualification for the federal investment tax credit is dc coupling power grid side solar + energy storage systems share growing a factor, but the investment tax credit in 2021 ( ITC) , it can't share is expected to gradually reduce cases will continue to grow.

recently, the United States department of energy's national renewable energy laboratory ( NREL) Recently released & other; Sound attenuation method and photovoltaic application & throughout; （ 健壮的PV降解方法和应用程序) Is aimed at better understanding of the real decrement of photovoltaic modules.

this growth is due to the dc coupled system architecture bring new change, make solar + dc coupling energy storage projects for the first time a grid application, got more attention. Typically, the user side ( BTM） Dc coupled systems use battery energy storage system and solar power generation assets related a multi-port hybrid inverter. Although these inverter is suitable for the user side ( BTM） Battery energy storage projects, but they are not suitable for the grid side ( 英尺分) Battery energy storage projects.

grid side ( 英尺分) Battery energy storage project of new changes of DC architecture independent DC - involving connected to the battery DC converter. The new grid side ( 英尺分) Dc coupled systems usually have lower than ac coupling system interconnection costs, and because they are only dependent on the single interconnection points. Interconnection cost will significantly affect the project developers capital spending ( According to the size of the system, interconnection cost can be 20% to 35% of the system balance cost stack) 。

the dc coupling system of single point interconnection also makes large-scale solar power generation facilities to store excess electricity in battery energy storage system, to make it economically viable, to support the excess solar time shift of economy effectively.

given to eliminate the acquisition system communication, reduces the system balance requirements, and easy to interconnect, the dc coupling system installation cost is lower than ac coupling system between 3% and 10%, depending on the solar + energy storage project size and duration of the discharge of the battery.

however, as the scale of system, dc system began to lose its cost advantage. Solar + energy storage scale of the project, through the power conversion and other hardware components to achieve economies of scale will not translate into capital spending, the overall system for solar power generation facilities and battery energy storage system to take more cost.

dc coupling system is easy to obtain the federal investment tax credit, at the end of 2021, the grid side ( 英尺分) The proportion of battery energy storage projects will drop to 10%. However, according to the report, although the qualification for the federal investment tax credit is dc coupling power grid side solar + energy storage systems share growing a factor, but the investment tax credit in 2021 ( ITC) Gradually reduce, its share of the market is still expected to continue to grow.

the current dc system do not allow the battery charging from the grid, so the ac coupling system will be mainly used for power battery installed systems that support the application of architectural option by default.

the user side of the commercial and industrial sectors, BTM） Battery energy storage market is the only one dc coupled systems without growth areas. Wood Mackenzie, the company said the sector continues to adopt ac coupling system, and will continue to do so in a short time. Although has the advantage of easy to install and system balance requirements, make dc coupled architecture in residential solar + energy storage is very popular in the market, but at present there exist some problems in the hybrid inverter of the port, such as a single point of failure, the input voltage is fixed, and the loss of flexibility, make it to the user side ( BTM） Battery energy storage system of nonresidential market reduces the appeal.

ac coupling system is better than dc coupling system is more suitable for future deployment of solar power generation facilities or battery energy storage system upgrades, and need higher reliability and flexibility of micro grid.