String inverters are the most cost-effective inverter options available in the U.S. Traditionally, solar installation companies offer systems with string inverters if your roof has limited shading throughout the day and does not face multiple directions (such as a gabled roof). However, recent hardware and software updates from major string inverter companies allow them to be applicable in a wider set of circumstances.
HOW STRING INVERTERS WORK
Your solar panels are arranged into groups connected by “strings”, hence the name. Multiple strings of panels can be connected to a single inverter, which transforms the DC electricity produced by the panels into appliance friendly AC electricity.
String inverter technology is a very reliable, tried-and-true technology that has been around for decades. Modern solar technology allows individual panels to continue producing power even if a part of the panel is shaded, although without module level power electronics, string inverters can only optimize power output at the string level, not at the individual panel level. This means that string inverter systems may not be right choice for homes that are prone to shading throughout the day. However, the ease of installation and lower price point makes them attractive to many homeowners and installers.