String solar inverters are the most widespread type of inverter around the world. According to IHS Markit 2020, in 2019 they occupied more than 60% of the whole market
. String inverter is grid-connected and can take care of a row of solar panels, which are considered as one string. The main disadvantage of a string inverter is its inability to cope with problematic panels: if even one panel in a row suffers from shading or is damaged and has lower efficiency as a result, it usually drags down other panels in a row to its level. However, string inverters are relatively inexpensive and reliable, which probably explains their popularity. If your installation is large, it is possible to use multiple string inverters.