What to Expect When You’re Expecting a Main Electrical Panel Upgrade(MPU) on the Central Coast of California with Elect Electric
Updated: 2 days ago
What to Expect When You’re Expecting a Main Electrical Panel Upgrade (MPU) on the Central Coast of California with Elect Electric
If you’re considering a main electrical panel upgrade in San Luis Obispo County or California’s Central Coast, you probably have questions about permits, PG&E, inspections, how long your power will be off, and what the entire process looks like.
At Elect Electric, we coordinate the process from the initial Project Planning Consultation through permitting, utility coordination, installation, inspection, and reconnection.
Whether your home has overhead or underground electrical service, here’s what you can expect when it’s time to replace or upgrade your main electrical panel.
Step 1: Start with a Project Planning Consultation
The first step is our Project Planning Consultation.
Instead of automatically scheduling an electrician to come to your home just to look at the panel, we can usually gather much of the information we need remotely.
We’ll ask you for photos of your existing electrical panel, meter, surrounding area, and other relevant equipment. You can submit the information through our website or text the photos to our office.
If it would be helpful, we can also schedule a phone or Zoom call to talk through the project with you.
During this process, we’re looking at things such as:
Your existing electrical service size
The type and condition of your current panel
Whether your electrical service is overhead or underground
Available space and the location of the equipment
Your current electrical needs
What you may want to add to your home in the future
Potential complications we can identify before the project begins
This also gives us a chance to understand why you’re considering an upgrade.
Maybe you’re adding an EV charger, heat pump, solar system, Powerwall or other battery storage. Maybe your existing electrical panel is obsolete or damaged. Or perhaps you’re simply trying to prepare an older home for its next several decades of use.
Understanding the reason behind the project helps us recommend the right solution instead of simply replacing what’s already there.
Step 2: Review Your Main Electrical Panel Upgrade Options
Using the information you provide, Elect Electric can prepare a detailed, upfront estimate for your project.
Depending on your home and your goals, we may provide several options rather than simply replacing the existing panel with a modern equivalent.
This is a great opportunity to think about how your home’s electrical needs may change in the future.
Your options may include additional electrical capacity, improved surge protection, more breaker space, equipment designed to accommodate solar or battery storage, or other modern electrical upgrades.
We may also determine that increasing your electrical service size isn’t necessary.
The goal isn’t just to replace what’s there.
It’s to determine what makes sense for your home today and what may make sense tomorrow.
Step 3: Approve the Project and Schedule a Site Visit
Once you’ve reviewed the options and selected the work you would like completed, you’ll approve the project and make the required initial payment.
That’s when we move from planning into project preparation.
We will schedule an on-site visit to verify the information used to prepare the estimate, take measurements, confirm equipment locations, and identify any conditions that need to be addressed before installation.
This is also when we can verify conduit routing, service locations, grounding and bonding requirements, access, and other job-specific details.
When underground utilities need to be identified before digging or other work, we’ll also coordinate the appropriate USA North 811 utility marking process.
Once the project has been verified, several things begin happening at approximately the same time.
Step 4: Materials, Permits and PG&E Coordination
Think of this stage as three parallel paths that all have to come back together before installation day.
Materials
We order and prepare the electrical panel, breakers, service equipment, and other materials required for your project.
For many standard main panel upgrades, the equipment we need is readily available. If your project requires specialized equipment, we’ll account for that as part of the scheduling process.
Local Building Permit
We apply for the required electrical permit with the appropriate city or county building department.
Elect Electric also coordinates the required electrical inspection.
For many standard main panel upgrades, the local permitting process is relatively quick.
PG&E Coordination
We submit the required information to PG&E and coordinate the utility side of the project.
This is often the least predictable part of the schedule.
Depending on the project and what PG&E requires, their portion of the process may take anywhere from approximately five days to 30 days or longer.
Projects involving underground service, engineering changes, utility equipment upgrades, or other special circumstances can take considerably longer.
Elect Electric will handle the coordination and keep the project moving, but PG&E’s processing, engineering, and scheduling timelines are outside of our control.
Once the materials, local permit, and PG&E requirements are all ready, we can bring everything together and schedule the work.
Step 5: Scheduling Your Main Panel Upgrade
A main electrical panel upgrade is a little different from a normal electrical service call because several different people and organizations may need to be coordinated on the same day.
For a typical main panel replacement, we need:
The homeowner and property ready for the scheduled outage
Elect Electric’s electricians and materials on site
PG&E available for the electrical service disconnect and reconnect
The local building department available for the required inspection
Our job is to coordinate those pieces so the old electrical service can be disconnected, the new equipment installed and inspected, and your home re-energized as smoothly as possible.
Once everything is confirmed, we’ll schedule the installation with you.
Step 6: What Happens on Main Panel Upgrade Day?
For many standard main panel upgrades, your electrical power will be shut off in the morning.
PG&E disconnects the utility power so our electricians can safely remove the existing equipment and begin installing the new electrical service equipment.
Depending on the project, this may include:
Removing the existing main electrical panel
Installing the new panel and meter equipment
Replacing or updating circuit breakers
Updating grounding and bonding
Updating the overhead service mast when required
Reconnecting existing circuits
Completing required labeling
Correcting related code requirements associated with the panel replacement
The installation must reach the appropriate stage for the local building inspector to inspect the work.
Once the required inspection has passed, PG&E can reconnect the electrical service.
How Long Will My Power Be Off?
This is probably the most common question we hear about main panel upgrades.
For most of our main panel upgrade projects, homeowners should plan to be without electrical power for the working day.
Power may be disconnected around 8:00 a.m., and in the majority of our projects it is restored by approximately 5:00 p.m.
However, we recommend preparing for the possibility of a longer outage.
Utility emergencies, inspection delays, unexpected job conditions, or PG&E scheduling issues can occasionally push the reconnection later into the evening, sometimes as late as 9:00 or 10:00 p.m.
That’s not typical, but we’d rather have you prepared for the possibility than surprised by it.
If you work from home, have medical equipment, refrigeration concerns (refrigerators are typically fine for a day without power), or another need that depends on continuous electrical power, please discuss it with us before installation day so you can make appropriate arrangements.
What If I Have Underground Electrical Service?
Underground electrical services can require additional planning.
If your existing underground utility conductors and related equipment can remain in place, the process may be fairly similar to an overhead panel replacement.
However, if PG&E requires changes to the underground service, the project can become significantly more involved.
That may include:
PG&E engineering
New conduit or service requirements
Trenching
Underground utility locating
New service conductors
Additional inspections
Additional utility fees
A longer project timeline
Underground service upgrades can also involve a longer PG&E application and engineering process than a standard panel replacement.
If we identify these requirements during planning, we’ll discuss the expected work, routing, process, and additional costs with you before proceeding.
We don’t want underground service requirements to become a surprise halfway through your project.
Step 7: Inspection, Reconnection and Final Details
Once the installation reaches the required stage, the local building inspector verifies that the work complies with applicable requirements.
After approval, PG&E can reconnect the electrical service.
Elect Electric then completes any remaining work, verifies operation of the electrical system, labels the new panel, and makes sure the installation is ready for you to use.
We’ll also show you the important features of your new electrical panel and answer questions about the equipment.
You should know where your main disconnect is, how your new panel is organized, and what to do if a circuit breaker trips.
Can an Older Electrical Panel Affect Homeowners Insurance?
For years, homeowners usually thought about replacing an old electrical panel when they needed additional capacity or when something failed.
In California, there’s another reason to pay attention to older electrical equipment: homeowners insurance.
California’s insurance market has changed significantly, and some insurance carriers are becoming increasingly selective about the homes and electrical equipment they are willing to insure.
Some older panel brands and designs that may raise concerns include:
Zinsco
Sylvania-Zinsco
Federal Pacific / FPE
Bulldog
Pushmatic
Older Circle AW equipment
Having one of these panels does not automatically mean your insurance company will cancel your policy. Requirements vary by insurance carrier, policy, and the condition of the equipment.
However, some homeowners may be asked to replace older or higher-risk electrical equipment as a condition of obtaining, renewing, or maintaining coverage.
If you have one of these older electrical panels, it may be worth planning for replacement before an insurance company gives you a deadline.
Planning an electrical upgrade is much easier when you have time to evaluate your options than when you’re trying to meet an insurance deadline.
Do You Actually Need a 200-Amp Electrical Service?
Not necessarily.
A main panel replacement doesn’t automatically mean increasing your electrical service size.
For example, a home with an older 100-amp electrical panel doesn’t automatically need a 200-amp service simply because the panel needs to be replaced.
Sometimes replacing obsolete or deteriorated equipment while maintaining the existing service capacity is the right solution.
Other homes really do need additional capacity.
That might be because you’re adding:
An EV charger
Electric heating or cooling
An induction range
An electric water heater
Solar
Powerwall or another battery system
An accessory dwelling unit
Other significant electrical loads
Modern energy-management technology can also sometimes allow homeowners to add equipment without immediately increasing the size of the utility service.
That’s one reason we prefer to look at your entire home and your future plans before recommending an upgrade.
A good electrical upgrade shouldn’t just solve today’s problem. It should take tomorrow into consideration too.
Before You Call: Take These Photos
Thinking about replacing your electrical panel?
A few photos can help us get started without requiring an initial trip to your home.
If it’s safe and accessible, take photos of:
The entire electrical panel and meter from several feet away
A close-up of the panel and meter
The circuit breakers with the panel door open
The manufacturer’s label, if visible
The area above, below, and around the panel
Your overhead electrical service, if you have one
The area where underground service enters the property, if applicable
A close-up of the existing PG&E meter helps us identify the electrical service equipment and plan th
Never remove the panel cover or expose electrical wiring to take a photo.
You can send the photos to Elect Electric or submit them through our Project Planning Consultation form.
From there, we can review your existing equipment, talk about what you’re planning for your home, and start developing your options.
Ready to Start Planning Your Main Panel Upgrade?
Replacing a main electrical panel involves a lot more coordination than most homeowners realize.
But you shouldn’t have to coordinate it yourself.
Our job at Elect Electric is to bring together the planning, materials, permits, inspections, PG&E coordination, and electrical work so everything arrives at the right place at the right time.
Elect Electric provides main electrical panel upgrades throughout San Luis Obispo County and the surrounding Central Coast, including Atascadero, Paso Robles, San Luis Obispo, Santa Maria, and nearby communities.
Start with a Project Planning Consultation.
Send us photos of your existing electrical panel and tell us what you’re trying to accomplish. We’ll help you understand your options and what to expect before the project begins.
Because a main panel upgrade shouldn’t just replace yesterday’s electrical system. It should help prepare your home for what’s coming next.
About the Authors:
This blog post was originally written by ChatGPT prompted by Daniel Ehinger, an experienced electrician dedicated to promoting electrical safety and best practices. The content was edited and enhanced by Daniel Ehinger, who provided valuable insights and improvements to ensure accuracy, clarity and readability.
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