IEEE 1547
The national standard for interconnecting distributed energy resources (solar, battery, generators) with the electric grid, specifying voltage regulation, frequency response, and islanding detection requirements.
Why It Matters
IEEE 1547-2018 enables solar inverters to provide grid support functions (voltage regulation, frequency response) that were previously prohibited, making rooftop solar more grid-friendly.
Related Terms
Interconnection Standard
State-level rules governing how solar and battery systems connect to the utility grid, including application requirements, timelines, fees, insurance, and technical standards (IEEE 1547).
Anti-Islanding
A safety feature that automatically disconnects a grid-tied solar system from the utility grid during a power outage, preventing the system from energizing downed power lines.
Grid Modernization
Upgrading the electrical grid with smart meters, sensors, automated switches, and two-way communication to handle distributed energy resources, reduce outages, and enable dynamic pricing.