In simple terms, a micro-inverter is an inverter that controls the output of a single solar panel. Each micro-inverter that is paired with a solar panel essentially creates a self-contained solar energy system.

Due to the way they're configured, micro-inverters have a few key advantages compared to string inverters that justify the higher price tag.

NO.1 Power Optimization

Micro-inverters allow you to produce more power out of the same panels. Each panel is individually controlled. If the output of a single panel drops, the other panels will not be affected. In areas where trees or other obstructions will cast shade on your panels, micro-inverters are well worth the investment. 

NO.2 Smarter Operation

Similar to the above point, if a piece of equipment fails completely, the rest of the array won’t be affected. 

With a traditional string inverter, the entire string could be affected to the point where the inverter wouldn’t produce power. You could potentially be left in the dark until you replace the faulty panel.

NO.3 Ease Installation

Micro-inverters use standard AC wiring, similar to what is used throughout your house. They are also plug-and-play, with each unit plugging into the next. 

NO.4 Expandable Design

Due to their 1-to-1 nature, systems with micro-inverters can essentially be as small or as large as you want them. If you want, you can start with a single panel+micro-inverter pairing. Adding more panels later isn’t a problem, because none of the existing equipment needs to be moved or re-wired to facilitate the addition