Everything you need to wire a solar system safely — cable sizing, protection, current conversions, and string configuration.
Size cable for the current and keep voltage drop safe.
Open calculator →Convert energy (kWh) to power (kW), and back — kW = kWh ÷ hours.
Open calculator →Convert apparent power (kVA) to real power (kW) — kW = kVA × power factor.
Open calculator →Safe current rating per NEC 310.16 with temperature and bundling corrections, plus breaker sizing.
Open calculator →Voltage and current for each wiring configuration.
Open calculator →Browse every tool on the all tools page, or design a full system with the system report builder.