Inverters are mainly classified according to application fields, output waveforms, topology, power levels, input source types and other dimensions.
Core classification methods of inverters
By application field
Off-grid inverters: used for independent power supply systems (such as remote mountainous areas or communication base stations) to convert battery DC power into AC power.
Grid-connected inverters: connected to the public power grid, used for distributed photovoltaic/wind power generation, converting DC power into AC power that meets the requirements of the power grid.
Hybrid inverters: integrate DC power from multiple power sources (such as photovoltaic panels, energy storage batteries) and realize intelligent power management.
Energy storage inverters: support bidirectional power conversion and are used in energy storage systems (such as home energy storage and microgrids).
By output waveform
Square wave inverters: simple waveforms and low costs, but with many harmonics, suitable for low-demand loads such as incandescent lamps.
Modified sine wave inverters (pseudo-sine waves): fewer harmonics, which can meet the needs of most household appliances.
Sine wave inverter: The waveform is close to the mains, suitable for precision instruments and high-power equipment (such as medical equipment, data centers).
By topology
Two-level inverter: Basic structure, suitable for small and medium power scenarios.
Three-level/multi-level inverter: Reduce harmonics, improve efficiency, mostly used in high-power industrial fields.
By power level
Micro inverter (<4kW): Adapt to a single photovoltaic panel, avoid the "barrel effect", and have high safety.
String inverter (1.5kW-250kW): Suitable for household, industrial and commercial distributed photovoltaics.
Central inverter (250kW-10MW): Used for large ground power stations.
Other categories
Voltage source inverter (VSI) and Current source inverter (CSI): Based on the input source type (constant voltage or constant current) respectively.
Self-excited oscillation type and external oscillation type: based on whether the conversion process depends on external signals.