Which Is Better: Microinverters or String Inverters?

Whether you're new to solar or already have a system, choosing an inverter is a big decision. The two main types are microinverters and string inverters. We compare them on function, price and performance.

Function

Both convert the direct current (DC) your panels produce into the alternating current (AC) your home uses. The difference is how they do it.

A microinverter mounts on each panel and optimizes that panel on its own. That helps a lot when some panels are partly shaded.

A string inverter converts power for a whole string of panels at one central inverter, so a string's output can be held back by its weakest panel. In ideal conditions, it performs very well.

Winner: microinverters. Ideal conditions are rare, and optimizing each panel handles shade and weather better.

Price

String inverters are cheaper. One inverter handles a whole array. Microinverters are needed on every panel, so large systems cost more.

Winner: string inverters. But if you want the most energy out of your system, microinverters are often worth the extra cost.

Performance

String inverters deliver steady production across large, unshaded arrays. Microinverters get the most from each panel, especially on smaller or partly shaded roofs.

Winner: tie. It depends on your site.

Watch the video

We also made a short video on this topic. (Note: the original YouTube embed may no longer be available.)

Still not sure? Every site is different, and Solar Sam can help you pick the right inverter.

Talk to Solar Sam

Solar Sam is based in Columbia, MO and serves Central Missouri and surrounding areas. Call (573) 819-9623 or email info@solarsam.com for a free, no-obligation quote.