Smart electrical panels

What makes a panel smart

A standard panel is passive. Breakers trip when a circuit overloads, and that is all. A smart panel adds three things:

• Metering on each circuit, so you see what the house uses and when.
• Breakers that can be switched or limited from a controller, locally or by app.
• A programmable limit on total load, which the system enforces by shedding lower-priority circuits.

The third item is the one that matters for the service. If a smart panel guarantees the house never pulls more than a set number of amps, then the electrician can argue the service does not need to be bigger.

How the code treats it

Energy management systems (EMS) have their own article, Article 750, in the 2023 NEC. California’s 2025 Electrical Code took effect January 1, 2026 and is built on the 2023 NEC. Three points matter for homes:

1. The system cannot cause an overload. Under 750.30, an EMS must not overload a branch circuit, feeder or service.
2. Some loads cannot be shed. Emergency systems, legally required standby systems, critical operations power systems and fire pumps are off the list, and so are some life-safety loads like elevators. Few of these appear in a house.
3. The setpoint can count in the calculation. A new section, 220.70, allows the maximum amp setting of an EMS to stand in for the connected load when sizing a feeder or service. Section 625.42 does the same for EV charging load.

The section numbers above are from the 2023 NEC as reported by trade sources, not from the California text, so confirm them with your building department. Whether the setting counts depends on the product being listed for the job, on the way it is installed and on whether the local building department agrees. Interpretation of 625.42 is unsettled among code officials. Treat any promise of “no upgrade needed” as a question for your inspector, and your utility.

Where a smart panel fits

An EV charger on a full 100 amp service. Load management keeps the charger from running at the same time as the dryer and range. See EV charger load management. A charger with its own sharing feature can do part of this without a smart panel.

Battery and solar homes. A smart panel can choose which circuits the battery backs up. See home battery installation.

Tight spaces. Where there is no room for a bigger panel or a trench for new service, a smart panel makes a swap possible at the existing size.

Not a fit. If the load calculation passes 200 amps even with limits, or if the panel is a known problem brand, go for a regular 200 amp panel or 400 amp service.

What to ask before you buy

1. Does the product have a listing for use as service or panel equipment?
2. Will the city and utility accept the load limit in the plan? Ask for it in writing.
3. What does the panel do if its internet connection drops? Local control matters.
4. Who sets and labels the limit? The code expects the equipment to carry a marking of the setting.
5. Can I override it, and does the override defeat the safety purpose?
6. What is the price difference compared with a plain panel of the same size?

Cost

No published SoCal price range covers smart panels, so none is given here. A standard panel swap runs $2,500 to $4,500 as of October 2026, and a smart panel adds equipment cost on top of it. The panel upgrade cost page explains the base range. A smart panel can reduce the cost of a bigger service, but the savings depend on your utility, so compare the two quotes.

Permit

A smart panel installs under the same electrical permit as any panel swap, plus the paperwork the building department wants for the load management plan. Expect to submit the load calculation with the limit shown. The 2025 code changes guide lists other updates, and the load calculation guide explains how the limit enters the math.