A solar inverter is used to convert the Direct Current (DC) electricity generated by solar panels into a usable form of Alternating Current (AC) that can be utilized to integrate with the grid or run AC home appliances. Solar panels are wired together in series (a string of panels) which increases the voltage and keeps the current low so that wiring is simpler and wire size can be smaller. String inverters are designed to be wired to a single series string of 8-15 solar modules and are currently the most widely used inverter type. String inverters are typically warranted for 10 years but this period can be extended to 20 years.
String Inverters – Definition, Glossary, Details – Solar Mangoadmin