Energy storage inverters and grid-tied inverters are two types of inverters that have some differences in their functions and applications.

Energy storage inverters are mainly used to convert direct current (DC) power into alternating current (AC) power and store it in batteries for later use. This type of inverter is often used in conjunction with energy storage systems, such as batteries, to achieve energy storage and output under unstable energy supply or off-grid conditions. Energy storage inverters can also manage the flow of energy, monitor battery status, and maximize system efficiency and maintain battery life by controlling the battery charging and discharging process.

In contrast, grid-tied inverters are used to convert power generated by DC power sources, such as solar photovoltaic panels or wind turbines, into AC power and inject it into the grid. This type of inverter is often used with renewable energy systems, such as solar photovoltaic systems or wind energy systems, to achieve grid-tied power generation of renewable energy. Grid-connected inverters must meet the requirements of the power grid, such as frequency, voltage, and power factor, to ensure that electrical energy is safely injected into the grid.

In summary, energy storage inverters are mainly used for energy storage and output, while grid-connected inverters are mainly used to convert DC energy into AC energy and inject it into the grid. There are some differences between the two in application scenarios and operating requirements, but in some cases, they can also be used in combination to achieve the needs of energy storage and renewable energy grid connection.