Renewable Energy Knowledge Hub

17 Apr 2023

Should you go for a String Inverter or Microinverter

String Inverter microinverter Sunglo.jpg

Inverters have one basic function, to convert Direct Current into an Alternating Current, which is the type of current that is used in homes. In this article we will delve into both String and Micro inverters. 


What is a string inverter?

A string inverter is a standalone device attached in series to your solar panels. Multiple strings of solar panels can be connected to your inverter. A string is essentially  a group of solar panels connected and all the strings are connected in parallel to each other.

Advantages of String Inverters

Easy to troubleshoot

A PV solar plant has a single string inverter, if anything were to ever fail in the system, it's likely the inverter, making troubleshooting relatively easy.


Installing a string inverter is cheaper than installing microinverters, as fewer labour hours are required and string inverters are more affordable than microinverters.

Lower probability of a wiring mishap

Since there are fewer connections overall in the system, there is a lower chance of the system being improperly cabled.


What is a Microinverter

Microinverters perform the same function as string inverters, but they are installed underneath each panel i.e.; number of microinverters is typically  equal to the number of panels, but there are microinverters which accept multiple panels. A microinverter takes full advantage of the power generated by each panel to the grid voltage.

Advantages of Microinverters

More Electricity

You can yield a higher output while using microinverters. The reason for that is that there are slight differences in currents between solar panels. When panels are in a string, the current is reduced to that of the least producing panel in a string.

Suitable for challenging installations

If the panels in a plant are facing multiple angles and directions then microinverters are the way to go, or you may have shading issues from trees or nearby structures, with a string inverter you may lose some of the production, but with microinverters you can achieve maximum production.


Microinverters have 10 year warranties which are extendable on the payment of a nominal fee.

Panel level Monitoring

Microinverters can track the production of each individual panel, while a string inverter can track the production of the whole system.

Ease of expansion

If you were to expand your system in the future, you can simply add microinverters and panels to your existing system.

String Inverter vs microinverter Sunglo.jpg

Should you go for a String Inverter or Microinverter

There is a list of things to keep in mind and a list of questions to ask yourself before choosing the correct inverter. String inverters are affordable and easy to maintain. Regular households prefer string inverters to microinverters. Microinverters are expensive but more efficient than string inverters. They are the most convenient inverter for small offices or large households. The factors to consider before choosing the correct inverter are:

  1. Price
  2. Longevity
  3. Installation
  4. Performance
  5. System Expansion Capacity
  6. Troubleshooting Steps
  7. Monitoring(Remote/Smart Home)
  8. Safety
  9. Battery
  10. Functions
  11. Reliability
  12. External Conditions Adaptation

There isn’t any best solar inverter for all applications. It depends on the above factors, and if you choose wisely, you will have the desired inverter at your convenience. 

FactorsMicroinverterString Inverter



ExpensiveMore Affordable



10 Years5 Years



Easy InstallationQuite Complicated



Very HighHigh, Low under non-ideal conditions

System Expansion Capacity


Excellent doesn't need any other sourceMay need another inverter

Troubleshooting Tips


Simple and convenientMaybe Complex

Panel Level Monitoring


Panel Level Monitoring is possiblePanel Level Monitoring is not possible



Rapid Emergency Shutdown AvailableRapid Emergency Shutdown not Available



Expensive but EfficientAffordable and moderately efficient



Excellent under any conditionsHigh under specific conditions



Very reliableModerately Reliable

External Conditions Adaptations


Great adaptation to external conditionsVery limited response to external conditions

Related Articles

Bhadla Solar Park Sunglo.png

5 Reasons for you to Go Solar!!!

29 Mar 2023
Sunglo_Solar Panels.jpg

The What How When & Why of Solar Panels

16 Apr 2023