Critical Load Panel
A sub-panel containing only essential circuits — typically refrigerator, some lighting, phone charging, and select outlets. Consumer battery backup products (Powerwall, PWRcell, Enphase IQ) typically only back up a critical load panel, not the full main panel. This means HVAC, water heaters, EV chargers, pools, and other high-draw systems lose power during an outage even with a consumer battery installed. A whole-home microgrid backs up the main panel — every circuit.
Related Terms
The pattern of electricity consumption across a property over time — how much power is drawn by which loads, at which times of day and year. Load profiling is the foundation of microgrid design: battery sizing, generator sizing, and solar sizing all derive from the actual load profile of the specific property. Generic 'average home' sizing is inadequate for large estates with HVAC, EV charging, pools, and other high-draw systems.
An operating state in which an appropriately configured property electrical system is isolated from the utility grid and supplied by local resources such as storage or generation. Island-mode capability, transition behavior, supported loads, and runtime depend on system architecture, approved protective equipment, available energy, and site conditions.
Everything Stays On.
Customer-sited generation + energy storage + backup generation + intelligent controls = whole-property power continuity.
Request System DesignYour information stays with Prime Microgrid. We do not sell your request to contractor networks or lead marketplaces.