Microinverters are devices used in solar energy systems to convert the direct current (DC) electricity generated by individual solar panels into alternating current (AC) electricity that can be used in homes or fed into the electrical grid. Unlike traditional string inverters, which are connected to multiple solar panels, microinverters are typically installed on each individual solar panel.
Here are some key points about microinverters:
Individual panel optimization: With microinverters, each solar panel operates independently, allowing for panel-level optimization. This means that shading, dirt, or other issues affecting one panel will not impact the overall system performance as severely as with string inverters. Each panel can produce its maximum power output, even if other panels are experiencing reduced output.
Higher energy harvest: By optimizing the performance of each panel, microinverters can improve the overall energy harvest of a solar system. This is particularly beneficial in installations with partial shading or panels oriented in different directions.
Simplified design and installation: Microinverters eliminate the need for complex string sizing calculations that are necessary with string inverters. They also simplify the installation process since there is no need for high-voltage DC wiring, as microinverters convert DC to AC directly at the panel level. This can enhance safety during installation and maintenance.
Monitoring and maintenance: Microinverters often come with built-in monitoring capabilities, allowing system owners to monitor the performance of each individual panel. This helps in quickly identifying any issues or underperforming panels. Additionally, because each panel operates independently, it is easier to locate and troubleshoot any faults within the system.
Scalability and flexibility: Microinverters offer greater flexibility in system design and scalability. Additional panels can be easily added to the system without major modifications, and panel orientations and configurations can be more diverse.
Microinverters typically come at a higher cost compared to traditional string inverters. However, the benefits of panel-level optimization and simplified installation can outweigh the higher upfront investment, especially in installations where shading or varying panel performance is a concern.