Off-grid inverter
1. Definition and functionOff-grid inverter is a device that can convert the DC energy generated by a DC power source such as a solar panel into AC energy and store it in a battery for subsequent use.
It is an independent system that does not depend on the external power grid.
2. Principle of operation
The DC power generated by the solar panels is converted through an inverter circuit to AC power supply for use.
At the same time, the circuit design allows the power to be stored in the battery for use at night or on cloudy days.
3. Application Scenarios
Mainly used in remote areas without grid connection or unstable grid, such as isolated islands, remote mountainous areas, ships, etc.4. Characteristics
- Independence: It does not depend on the external power grid and can operate independently.
- Energy storage: capable of storing electricity to ensure continuous power supply.
- Multiple protection functions: It has multiple protection functions such as input reverse connection protection, input under-voltage protection and output overload protection.
- High efficiency and stability: adopting PWM control mode to improve efficiency; sinusoidal waveform output, waveform distortion rate is less than 5%.
Grid-connected inverter
1. Definition and function
Grid-connected inverter is an inverter that converts DC power generated by distributed power sources such as solar panels into AC power and directly connects it to the public power grid.It allows users to sell excess power to the grid, realizing power recovery and revenue.
2. Principle of operation
Using Maximum Power Point Tracking (MPPT) technology, the operating point of the solar panel is adjusted according to the light conditions to extract the maximum power.It converts DC power to AC power and ensures that the output power matches the grid standard by synchronizing the frequency and phase of AC power with the grid.
3. Application Scenarios
It is mainly applied to scenarios such as urban and industrial areas that are connected to the public power grid.4. Features
- High efficiency and stability: Highly efficient conversion of DC power to AC power and integration into the power grid to ensure stable operation of the power grid.
- Intelligent: monitoring the parameters of solar panels and power grid, with automatic diagnosis, fault protection and other functions.
- Environmental protection and energy saving: injecting the power generated by renewable energy sources directly into the grid, which helps to reduce the dependence on traditional energy sources.
Hybrid Inverter
1. Definition and FunctionHybrid inverter combines the functions of off-grid inverter and grid-connected inverter to realize both off-grid and grid-connected systems.
It is capable of converting AC power from the utility to DC power for storage during peak power consumption and outputting it when needed.
2. Application Scenarios
It is suitable for homes, small commercial places, resorts and other small-scale places.
3. Features
- Flexibility: Off-grid and grid-connected working modes, adapting to different energy demands and application scenarios.
- Energy management: Allows users to manage energy by themselves, including storage and output.
- Efficient utilization: Stores power during peak consumption and outputs it when needed, reducing energy waste.
Through the detailed explanation above, we can see that off-grid inverters, grid-connected inverters and hybrid inverters have obvious differences in definitions, functions, working principles, application scenarios and features. Which inverter to choose mainly depends on the specific power demand and application scenarios.