A single string of Jinko 420W panels at 13. 96 A is well within limits for any standard inverter. When connecting multiple strings in parallel to the same MPPT input, the currents add: Total current = Isc per string x number of parallel strings.
String inverter sizing requires calculating total solar panel DC capacity, estimating inverter AC rating, configuring panel strings, and verifying voltage compatibility within the inverter MPPT operating range.
In this article, we'll review the basic principles of wiring systems with a string inverter and how to determine how many solar panels to have in a string.