Electrical Panel Upgrade Los Angeles: 100A, 200A, 400A & SPAN Planning
The right electrical upgrade is not determined by breaker count alone. A Los Angeles home may need a simple panel replacement, a subpanel, a 100A-to-200A service upgrade, a larger service, load management, meter relocation or no service upgrade at all. The answer depends on the actual loads, service equipment, utility requirements and the homeowner’s future plans.
This guide is for homeowners planning heat pumps, EV charging, solar, battery storage, ADUs or other electrification work and trying to understand what should be reviewed before the electrical scope is priced.
Full panel vs overloaded service
A physically full panel means the breaker spaces are occupied. It does not by itself prove that the utility service is too small. A load calculation and equipment review are needed to determine whether the service has adequate capacity.
Likewise, an older panel with open breaker spaces can still require replacement because of condition, rating, compatibility, utility requirements or the loads being added.
100A to 200A service upgrade
A 200A service is common in homes adding multiple electric loads, but it should not be treated as an automatic answer. Before proposing the change, confirm the existing service rating, calculated loads, meter/service configuration, overhead or underground feed, utility requirements, panel location and the new equipment being added.
When would a home consider 400A service?
Larger homes or properties with multiple major loads can require a larger service, but a 400A upgrade is a significant project. Review whether the loads truly require it, whether utility infrastructure can support it, how the service will be distributed, and whether load management or separate panels provide a better design.
Panel replacement vs service upgrade
| Project | What changes |
|---|---|
| Panel replacement | Replaces distribution equipment while the service size may remain the same. |
| Service upgrade | Changes service capacity and can involve meter, service conductors, utility coordination and new distribution equipment. |
| Subpanel | Adds distribution space but does not create additional utility service capacity by itself. |
| Load management | Controls or coordinates certain loads and may be useful when electrifying a home without simply increasing service size. |
SPAN smart panel
SPAN can add circuit-level monitoring and smart load control. It can be useful for homes coordinating Powerwall, EV charging, heat pumps and other electrification loads. SPAN is an option, not a universal requirement. Compare its features and project cost with a standard panel plus any required load-management equipment.
SPAN’s current manufacturer guidance distinguishes a panel upgrade from a utility service upgrade. Its PowerUp energy-management feature can manage selected loads to keep demand within the home’s existing service rating in some approved designs. That can help some projects avoid a larger utility service, but it is not a guarantee for every property. The exact design, service rating, equipment and utility requirements still control the outcome. Review SPAN’s current service-upgrade guidance.
Meter and service relocation
Some upgrades involve more than the panel. Existing meter location, clearances, overhead or underground service, utility access and planned construction can trigger meter or service relocation. Treat relocation as a separate defined scope rather than assuming it is included in a basic panel replacement.
For LADWP residential projects, LADWP currently says a contractor or homeowner planning a new residential service panel should request a meter spot before installation so the approved service-panel location is known. The online single-family process applies to service up to 320 amps, while larger service should be coordinated through the LADWP Connection Center. Review LADWP’s meter-spot process.
Plan for the loads you expect to add
- Heat pump HVAC
- Heat pump water heater
- EV charger
- Solar
- Tesla Powerwall or other battery storage
- Electric range or induction cooking
- Pool or spa equipment
- ADU or additional dwelling loads
- Future workshop or large appliances
Electrical upgrade checklist
- Existing service and main-breaker rating
- Panel manufacturer, condition and bus rating
- Load calculation and future-load assumptions
- Meter location and overhead/underground service
- Utility territory and utility requirements
- Permit and inspection responsibilities
- Grounding and bonding work included in the project
- Subpanel or load-management alternatives
- Whether wall, stucco or finish repair is included
- What is included, excluded or subject to a written change order
Older electrical panels need an equipment-specific review
For older or obsolete service equipment, including panels labeled Zinsco or Sylvania-Zinsco, identify the exact manufacturer and model before deciding the scope. A licensed electrical review should consider the panel condition, service rating, breaker and bus condition, available compatible components, grounding and bonding, and the loads being added. The recommendation should come from the actual equipment and project requirements rather than the brand name alone.
Coordinate electrical work with the whole-home plan
Electrical decisions affect HVAC, EV charging, solar and batteries. Review the HVAC panel and load review, Powerwall backup-load planning, Powerwall installation and solar installation before locking the final service size.
Request an Electrical Upgrade Review or call (833) 446-6387 to discuss the project as part of a coordinated home-upgrade plan. Final scope and pricing depend on the site review and written proposal.
