Square D Generator Interlock Kits

Square D electrical panels are commonly found in two main series: Homeline and QO. Each series uses different interlock kits, and the correct fit depends on your panel series, amperage, and main breaker position. We carry kits for both Homeline and QO panels from 100 to 400 amp, including vertical throw, meter main, and outdoor configurations. GenInterlock branded kits are MET-Listed and Made in the USA.