Micro Inverters

A solar power systems (Photovoltaic systems) production can be affected by many factors such as module mis-match (module mismatch is the fluctuation of output between two solar panel with the same plated wattage, but one produces less power than the other), shading, and obstacles such as dust or debris. In addition, non-uniform changes in temperature, solar irradiance, and shading create complex current-voltage curves, affecting energy output. This is due to the fact that in traditional systems the performance of the entire system is dictated by the performance of the weakest module.

The micro inverter system corrects many of the factors that degrade solar system production.  This does this by performing Maximum Power Point Tracking (MPPT) at each solar panel.

MPPT is an algorithm used to calculate and respond to temperature and light changes detected on a solar power system, and to determine how much power to draw from the module. In contrast, centralized inverter’s MPPT algorithm sees the entire solar power system as a single module, and responds to the lowest production numbers it detects. 

Micro inverter MPPT algorithm works at each solar module in an installation and achieves greater accuracy which enables it to maximize energy harvest at all times, even during variable light conditions.

Traditional string inverters implementations create a single point of failure for solar power systems. If the inverter fails, the entire system is inoperable. Micro inverters convert power independently at each solar module. If one micro inverter fails, the rest continue to operate as usual. Also, if a micro inverter is damaged or fails, it can be replaced during routine maintenance or when convenient, further reducing maintenance costs.

Another benefit of the micro inverter design is the potential for installations to be expanded over time. An initial set of solar modules can be installed and additional modules added as needs and budgets grow without requiring the replacement of a large centralized inverter.