The difference between photovoltaic inverters and energy storage inverters

In the field of new energy, both photovoltaic inverters and energy storage inverters are important devices that play a crucial role in the photovoltaic storage industry. However, have you ever thought about the differences between photovoltaic inverters and energy storage inverters?

Photovoltaic inverter: It is mainly a device that converts DC power into AC power. It utilizes the switching characteristics of semiconductor devices such as field-effect transistors or thyristors to control the power supply voltage and current through rapid switching, thereby achieving the conversion of DC to AC power.
Energy Storage Inverter (PCS): It is a more comprehensive concept that encompasses the process of converting, regulating, and controlling electrical energy using power electronic devices. PCS typically includes multiple functional modules such as rectification, inverter, and DC/DC conversion, with the inverter module being just one of these modules.

Photovoltaic inverter: mainly responsible for converting the direct current (DC) generated by solar photovoltaic panels into alternating current (AC) for household or grid use.
Energy Storage Inverter (PCS): Energy storage inverters focus on bidirectional conversion and intelligent management of electrical energy. Not only does it have the function of a 76% photovoltaic inverter, but it can also convert AC power back into DC power and store it in a battery, or release DC power from the battery and convert it into AC power for supply. It also supports the collaborative work of battery management system (BMS) and energy management system (EMS) to optimize the charging and discharging of electricity, and can independently perform peak valley shaving and intelligent scheduling of energy storage system charging and discharging.

Photovoltaic inverter: The energy flow is unidirectional, that is, from the photovoltaic panel to the grid or load.
Energy Storage Inverter (PCS): Energy flows in both directions, from the grid or photovoltaic panels to the battery, or from the battery to the grid or load.

Photovoltaic inverter: mainly used in the field of solar power generation, including households, businesses, and large ground power stations. Its core function is to convert the direct current of the solar system into alternating current for use in the power grid.
Energy Storage Inverter (PCS): widely used for connecting energy storage systems with the power grid, such as industrial and commercial energy storage stations, household photovoltaic storage systems, and large-scale storage systems. It controls charging and discharging through devices such as batteries, stores and releases energy to meet different power demands at different times, ensuring the continuity and stability of power supply.

Photovoltaic inverter: Its function is relatively single, so its cost is usually lower. Photovoltaic inverters account for approximately 3-5% of the initial investment cost in photovoltaic systems, around 0.1 yuan/W.
Energy Storage Inverter (PCS): Due to the need for an integrated battery management system, its cost is relatively high.
Energy storage inverters account for approximately 15-20% of the initial investment cost in battery energy storage systems.