What is a smart electrical panel?

A smart electrical panel replaces or supplements a home's main load center with circuit-level metering and control. Products like SPAN and Lumin let a homeowner see, prioritize, and remotely switch individual circuits — which becomes powerful when paired with solar and storage. Here is what they do and why they matter for backup.

Beyond a standard load center

A traditional panel simply distributes power to branch circuits through breakers. A smart panel adds intelligence on top:

• Per-circuit metering — real-time consumption for every breaker, not just the whole home.
• Remote control — turn circuits on or off from an app.
• Automated load management — shed or prioritize loads based on rules or available power.
• Integration — coordinates with solar, batteries, and EV chargers.

Some designs (like SPAN) replace the main panel outright; others (like Lumin) sit alongside an existing panel and control a subset of circuits.

Why load management matters for backup

The expensive part of resilience is battery capacity. During an outage, a home's total load often exceeds what a single battery can supply. A smart panel solves this by prioritizing circuits:

• Essential loads (refrigerator, lights, well pump, medical devices) stay on.
• Discretionary loads (electric dryer, oven, EV charger) are shed automatically when the battery is discharging or solar is low.
• As conditions change, circuits are restored in priority order.

The result: a smaller battery can back up more of the home because the panel prevents big loads from overwhelming the inverter. This can also avoid the cost and space of a separate protected-loads subpanel.

Monitoring value

Even without a battery, per-circuit data helps homeowners understand where energy goes and how much of their solar production is self-consumed. That granularity is similar to what a CT-based monitor provides — see solar consumption monitoring and CTs — but built into the panel itself.

Design and permitting notes

A smart panel is still a listed piece of service equipment and must be installed to the NEC and the manufacturer's instructions:

• It appears on the one-line diagram like any panel, with its main breaker, bus rating, and interconnection point shown.
• Battery and solar interconnection must respect busbar and 120% rules where applicable.
• The AHJ reviews it as service equipment; confirm the specific product is listed for your configuration.

The full picture of what a reviewer expects on the drawings is covered in what is in a solar permit set.

Smart panels are optional, but they turn a battery into a more flexible backup by managing loads circuit by circuit. Confirm listings and ratings against the manufacturer documentation, and have a licensed electrician or PE review the final design. Planning storage? See how to size a solar battery backup or try the DIY workflow.

Educational reference, reviewed 2026-07. A design aid, not a substitute for a licensed electrician or PE. Confirm the enforced NEC edition and local amendments with your AHJ.