Photovoltaic inverter and storage inverters in function, structure, technical requirement and application scenario, the following is their specific contrast: the functional characteristics of photovoltaic inverter, the main function is to convert the dc solar panels generate alternating current (ac), in order to satisfy the demands of family enterprise, electricity or power grid. With the maximum power point tracking (MPPT) function, the solar panel operating point can be adjusted in real time to improve power generation efficiency. Energy storage inverter: in addition to the transition of direct current (dc) and alternating current (ac), can also two-way conversion to electrical energy.

When the power grid is sufficient, the alternating current is converted to direct current to charge the energy storage equipment; When the power supply is insufficient or the power is cut off, the direct current in the energy storage device is converted to alternating current to supply power to the load, which has intelligent energy management function. Structure design of photovoltaic inverter: generally by the dc input circuit, inverter circuit, output circuit, control circuit and so on, relatively simple structure, focus on direct current (dc) to alternating current (ac).

Energy storage inverter: usually includes rectifier circuit, inverter circuit, DC/DC conversion circuit, battery management system interface, control circuit, etc., the structure is more complex to meet the energy two-way conversion and management needs of energy storage equipment.

Technical requirements for pv inverter: focus on straight/ac conversionefficiency, power density, protection function and protection grade,because often installed outdoors, good weatherability and anti-jammingcapability is required. Energy storage inverter: more charge and discharge efficiency, and on/off-grid switching speed, stored energy density, etc., need a quick response grid and energy storage device status change, still need to work closely with the battery management system, to ensure the safe operation of the energy storage device. Photovoltaic inverterapplication scenarios: mainly used in household photovoltaic power generation systems, industrial and commercial pv projects, large ground power station, etc., used to convert solar energy directly to electrical energy available. Energy storage inverter: suitable for home energy storage systems, industrial and commercial energy storage power station, scenarios, such as micro power grid can be realized in different energy scenario electrical energy storage and flexible deployment, improve energy utilization efficiency and stability of power supply. Photovoltaic inverter performance index 2: generally focus on conversion efficiency and power density, MPPT accuracy, protection grade indicators, to ensure the efficient and stable under different light conditions to convert pv dc to ac.