What is the difference between an energy storage inverter and a photovoltaic inverter?
Time:2024-07-26
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As the core component of photovoltaic power generation and energy storage systems, inverters are famous outside. Many people see them with the same name, the same role in the same field, it is thought that these two is the same kind of products, in fact, it is not.
Energy storage converter (i.e. PCS), also known as ‘bi-directional energy storage inverter’, is the core component to realise the bi-directional flow of electricity between the energy storage system and the grid, which is used to control the charging and discharging process of the battery, and carry out the conversion of alternating current and direct current. It can be used to supply power directly to AC loads in the absence of a power grid.
According to the energy storage converter application scenarios and capacity size, the energy storage converter can be divided into photovoltaic energy storage hybrid converter, small power energy storage converter, medium power energy storage converter, centralised energy storage converter and so on.
Photovoltaic storage hybrid, low-power storage converters are used in household and industrial/commercial scenarios, where photovoltaic power can first be used by local loads, with excess energy stored in batteries, and optionally connected to the grid if there is still a surplus of electrical energy.Medium-power, centralised energy storage converters can achieve higher output power and are used in industrial and commercial, power station and large-scale power grid scenarios to achieve peak shaving and peak/frequency regulation.
Electrochemical energy storage system generally consists of four core parts: battery, energy management system (EMS), energy storage inverter (PCS), and battery management system (BMS). Energy storage inverter can control the charging and discharging process of the energy storage battery pack, and carry out the conversion of AC and DC, which has a very important role in the industry chain.Photovoltaic inverter, is dedicated to the field of solar photovoltaic power generation inverter, the biggest role lies in the solar cells generated by the DC power through the power electronic conversion technology into can be directly connected to the grid, the load of AC power.PV inverters, as the interface device between PV cells and the power grid, convert the electrical energy of PV cells into AC energy and transmit it to the power grid, which plays a crucial role in the PV grid-connected power generation system. With the promotion of BIPV, in order to maximise the use of solar energy conversion efficiency, while taking into account the aesthetic appearance of the building, gradually diversified requirements for the inverter form. At present, the common solar inverter methods are: centralised inverter, string inverter, multi-string inverter and module inverter (micro-inverter).The biggest difference: the demand for inverters in energy storage scenarios is more complex than in grid-connected PV scenarios. In addition to DC to AC conversion, it also needs to have the functions of converting from AC to DC, and fast switching between grid-connected and off-grid, etc. At the same time, the energy storage PCS is also a bi-directional converter, with energy control in both charging and discharging directions.In other words, energy storage inverter has higher technical barriers.
Energy storage converter (i.e. PCS), also known as ‘bi-directional energy storage inverter’, is the core component to realise the bi-directional flow of electricity between the energy storage system and the grid, which is used to control the charging and discharging process of the battery, and carry out the conversion of alternating current and direct current. It can be used to supply power directly to AC loads in the absence of a power grid.
According to the energy storage converter application scenarios and capacity size, the energy storage converter can be divided into photovoltaic energy storage hybrid converter, small power energy storage converter, medium power energy storage converter, centralised energy storage converter and so on.
Photovoltaic storage hybrid, low-power storage converters are used in household and industrial/commercial scenarios, where photovoltaic power can first be used by local loads, with excess energy stored in batteries, and optionally connected to the grid if there is still a surplus of electrical energy.Medium-power, centralised energy storage converters can achieve higher output power and are used in industrial and commercial, power station and large-scale power grid scenarios to achieve peak shaving and peak/frequency regulation.
Electrochemical energy storage system generally consists of four core parts: battery, energy management system (EMS), energy storage inverter (PCS), and battery management system (BMS). Energy storage inverter can control the charging and discharging process of the energy storage battery pack, and carry out the conversion of AC and DC, which has a very important role in the industry chain.Photovoltaic inverter, is dedicated to the field of solar photovoltaic power generation inverter, the biggest role lies in the solar cells generated by the DC power through the power electronic conversion technology into can be directly connected to the grid, the load of AC power.PV inverters, as the interface device between PV cells and the power grid, convert the electrical energy of PV cells into AC energy and transmit it to the power grid, which plays a crucial role in the PV grid-connected power generation system. With the promotion of BIPV, in order to maximise the use of solar energy conversion efficiency, while taking into account the aesthetic appearance of the building, gradually diversified requirements for the inverter form. At present, the common solar inverter methods are: centralised inverter, string inverter, multi-string inverter and module inverter (micro-inverter).The biggest difference: the demand for inverters in energy storage scenarios is more complex than in grid-connected PV scenarios. In addition to DC to AC conversion, it also needs to have the functions of converting from AC to DC, and fast switching between grid-connected and off-grid, etc. At the same time, the energy storage PCS is also a bi-directional converter, with energy control in both charging and discharging directions.In other words, energy storage inverter has higher technical barriers.
Patrick Qi
Patrick Qi
Gitenno