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.

Cost

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.

Lifespan

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.

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.