Single-string inverters provide amuch lesser capacity than a central inverter. They are called the Central inverterbecause they tend to incorporate long PV strings, other than the spread-out architecture seen with string inverters. The capacity of each type of inverter is varying and shifting toward the middle as central. Central inverters have higher efficiency in regard to converting DC electricity to ACelectricity. On the other hand, string inverters are not as. Central inverters are used inutility-scale solar or large-scale commercialinstallations. On the contrary, a string inverter is used in. Another major question people ask before choosing between central and string inverters is in regard to their advantages. So, let's find out what is. Central inverters are more expensiveand have more maintenance demands in comparison to string inverters. Also See: 7 Types of Solar Inverters:.