There are different types of string inverters used in solar installations, including standard string inverters, optimized string inverters, and hybrid string inverters. Each type has its own advantages and disadvantages, depending on the size, design, and location of your solar system. Some factors to consider are efficiency, reliability, cost, warranty, and compatibility with other solar components.
Standard string inverters are the simplest and most economical type of solar inverter. They are suitable for solar systems with uniform shading and orientation, as they operate at the average output of all the panels in the string. They do not allow individual monitoring of each panel, so it can be difficult to detect and troubleshoot any issues that may arise with the system.
Optimized string inverters are similar to standard string inverters, except they have a power optimizer for each panel. A power optimizer is a device which adjusts the voltage and current of each panel to maximize its output. Optimized string inverters are more expensive than standard string inverters, but they offer better performance and efficiency. They also allow for individual monitoring of each panel, which can help identify and resolve any problems arising with the system.
Hybrid string inverters are a combination of a standard string inverter and microinverters. Microinverters are devices which convert the DC power from each panel into AC power at the level of each solar module. Hybrid string inverters include a microinverter for each panel as well as a central inverter which synchronizes and manages the AC power from all the microinverters. Hybrid string inverters are the most expensive type of solar inverters, but they offer the highest performance and flexibility across all types of roof conditions. They also allow individual monitoring of each panel, as well as battery integration and grid support features.