Backfeed Breaker
A dedicated circuit breaker in the electrical panel that receives power from the solar inverter. It connects the solar system to the home's electrical distribution system.
Why It Matters
NEC code limits the total breaker amperage feeding a panel. If your panel is already near capacity, you may need a panel upgrade or a feed-through lug kit to accommodate the solar backfeed breaker.
Related Terms
Panel Upgrade
Replacing a home's electrical panel with a higher-capacity one (typically 100A to 200A) to accommodate additional electric loads like solar, battery, EV charger, or heat pump.
NEC (National Electrical Code)
The U.S. standard for electrical installation safety (NFPA 70). Article 690 specifically covers solar PV systems, including wiring, grounding, labeling, and rapid shutdown requirements.
Inverter
A device that converts direct current (DC) electricity from solar panels into alternating current (AC) electricity used by your home.