Enter your module specs, your inverter's MPPT window, and your design temperatures. Get back valid series/parallel combinations with cold-adjusted Voc and hot-adjusted Vmp, flagged for code compliance. Defaults are a typical residential 400W module and a SolarEdge-class string inverter.
Design-assist only. Final permits require a licensed PE and AHJ review. This tool is a starting point, not a stamped deliverable.