String Inverter VS Central Inverter: What’s Different

Solar energy is quickly gaining popularity in India. Central to any solar power system, inverters play an important role by converting the direct current (DC) into alternating current (AC) that powers your home or business. With several types of inverters available, choosing the right one is key to the efficiency and performance of your solar power system. In this blog post, we’ll explore the differences between string inverter vs central inverter, helping you make an informed decision.

What is a String Inverter?

A string inverter is a type of solar inverter used to convert DC power from multiple solar panels into AC power. Each panel is connected in series (a string), and the combined DC power is then sent to a central inverter.

Benefits of String Inverters

1. Modularity: One of the primary benefits of string inverters is their modularity. You can easily add or remove strings of panels without impacting the overall system.

2. Ease of Maintenance: String inverters are relatively easier to maintain compared to central inverters. If one string inverter fails, only the panels connected to that string are affected, making troubleshooting simpler and often more cost-effective.

Common Applications: String inverters are commonly used in both residential and commercial settings, where installations vary in size and complexity. They are particularly suitable for systems with shading issues, as each string can operate independently.

What is a Central Inverter?

A central inverter is a large, powerful inverter that converts DC power from multiple solar panels into AC power. Unlike string inverters, which handle smaller groups of panels, central inverters manage the output of an entire solar array.

Advantages of Central Inverters

1. Handling Large-Scale Installations: Central inverters are designed to handle large-scale solar installations, making them ideal for utility-scale projects. They can manage the output of thousands of solar panels, providing a centralized point of conversion and control.

2. Efficiency: Central inverters are generally more efficient for large installations, as they reduce the complexity of wiring and can handle higher voltage inputs, leading to lower energy loss.

3. Common Applications: Central inverters are typically used in utility-scale solar projects, such as large solar farms, where the sheer number of panels makes individual string inverters impractical.

Key Differences Between String Inverter vs Central Inverter

When it comes to selecting the right inverter for your solar power system, it’s essential to understand the key differences between string inverters and central inverters. Here are some factors to consider:

Efficiency

String inverters may experience efficiency losses due to shading or mismatched panels in a string. However, they offer the advantage of modularity, allowing for more precise management of individual strings.

Central inverters, on the other hand, generally provide higher efficiency for large-scale installations due to their ability to handle higher voltage inputs and reduce wiring complexity.

Scalability

String inverters are ideal for smaller installations and can be easily scaled by adding more strings. This makes them a flexible option for residential and commercial projects.

Central inverters are better suited for large-scale installations where scalability is less of a concern. Their ability to manage the output of thousands of panels makes them the go-to choice for utility-scale projects.

Cost

The cost of string inverters is typically lower for small to medium-sized installations. However, as the scale of the project increases, the cost of multiple string inverters can add up.

Central inverters may have a higher upfront cost, but they become more cost-effective for large-scale installations due to their ability to handle larger volumes of power with fewer units.

Installation Complexity

String inverters offer simpler installation and maintenance for smaller systems. Each string operates independently, making troubleshooting and repairs more straightforward.

Central inverters require more complex installation and maintenance for large systems. They centralize the conversion process, which means any issues can impact the entire system.

Sungrow’s PV Inverters

Sungrow’s string inverters are perfect for residential and commercial applications, providing modularity and ease of maintenance. Their central inverters, on the other hand, are ideal for utility-scale projects, offering high efficiency and the capacity to handle large-scale installations.

Sungrow provides top-rated string inverters that range from 2.5 kW to 352 kW. With features like high yield, smart control, safety, and durability, you can trust Sungrow to bring reliable power solutions. Sungrow’s central inverters are offered in standard container sizes of 10 or 20 feet, with a starting capacity of 500 kW and a maximum power output of up to 6.8 MW. Whether you’re looking to install a small residential system or a large utility-scale project, Sungrow has the perfect solution for you.

With over 27 years of experience providing solar solutions, Sungrow has installed 605 GW of power electronic converters worldwide. As the world’s No. 1 on PV inverter shipments, Sungrow will definitely not disappoint you. Visit Sungrow’s website now to discover how these inverters can transform India!