If you’re planning to install solar panels, an EV charger, or new appliances, your home’s electrical system needs to be ready to handle the extra load. A Main Panel Upgrade (MPU) is one of the most important steps in making sure your electrical system is safe, efficient, and compliant with modern standards.
At Starlight Energy, we perform main panel upgrades across California for homeowners transitioning to solar or adding high-demand equipment. Here’s everything you need to know — and how to prepare for a smooth MPU process.
What Is a Main Panel Upgrade?
Your main service panel (also called a breaker panel or load center) is the central hub that distributes electricity throughout your home. If it’s old, undersized, or doesn’t have room for new breakers, you may need to upgrade it.
A main panel upgrade involves replacing the existing electrical panel with a modern one that offers:
Higher amperage capacity (typically 125A, 200A, or more)
New breakers and safer wiring connections
Better grounding and bonding for code compliance
Space for future solar, EV, or battery equipment
Why You Might Need a Panel Upgrade
Most homes built before the 1990s have panels rated between 60A and 100A, which were fine for that era — but not for today’s high-power homes.
You may need an MPU if you:
Plan to install solar panels or battery storage
Are adding an EV charger, hot tub, or new HVAC system
Have frequent breaker trips or flickering lights
Have an outdated or unsafe panel brand (like Zinsco or Federal Pacific)
Need to meet utility or city requirements for solar interconnection
Upgrading your panel doesn’t just increase capacity — it improves safety, efficiency, and resale value.
How to Prepare for a Main Panel Upgrade
1. Schedule an Inspection
Start with a site assessment from a licensed electrical contractor like Starlight Energy. We’ll inspect your existing panel, service drop, grounding, and available amperage. This helps determine the right panel size and equipment needed.
2. Check With Your Utility Company
Most utilities require coordination when upgrading a panel, since it involves disconnecting and reconnecting power. Your contractor will usually handle this process, but homeowners should be aware that utility approval can take 1–3 weeks depending on your area.
3. Plan for a Temporary Power Outage
During installation day, your home’s power will be shut off for 4–8 hours while the new panel is installed and tested. Plan to:
Keep refrigerators closed
Charge phones and devices ahead of time
Power down sensitive electronics
At Starlight Energy, we coordinate with the utility and inspection departments to minimize downtime.
4. Clear Access to the Work Area
Make sure the area around your electrical panel is clean, accessible, and well-lit. Clear out any storage, shelves, or obstacles within a 3-foot radius. This helps your installer work safely and efficiently.
5. Grounding and Bonding Check
A proper MPU includes grounding to two 8' copper rods and bonding to the water line, as required by code. Homeowners should know where these connections are located — often near the main service or garage.
6. Prepare for Permit and Inspection
A main panel upgrade always requires an electrical permit and a final city inspection. A professional installer will handle this for you, but make sure you’re available for final sign-off if required.
After the Upgrade
Once your new panel is installed:
Verify all labels are clear and accurate
Review your breaker layout with the technician
Keep your permit and inspection documents for your records
You’ll immediately notice cleaner wiring, better organization, and more space for future circuits — especially if you plan to add solar or battery storage later.
Common Questions About MPUs
How long does a main panel upgrade take?
Most jobs are completed in one business day, with permits and utility coordination adding about 1–3 weeks to the total process.
Can I combine my MPU with a solar installation?
Yes — in fact, it’s often best to complete both together. At Starlight Energy, we design your solar and electrical upgrades to work seamlessly for faster interconnection and fewer delays.
How much does a panel upgrade cost?
Costs vary depending on your existing setup and amperage requirements, but most homeowners can expect $2,500–$4,500 for a full, code-compliant upgrade.
Will my power company charge extra?
In most cases, the utility service upgrade (like a new meter or service drop) is included at no cost, though this varies by utility.
Why Choose Starlight Energy
With over 10 years in the solar and electrical industry, Starlight Energy is committed to providing reliable, code-compliant upgrades that prepare your home for the future.
We handle everything — from permits and utility coordination to installation and final inspection — so you can enjoy a stress-free experience.
If you’re planning to install solar or simply want to modernize your home’s electrical system, start with a professional main panel upgrade consultation.
⚡ Schedule Your Free Assessment Today⚡
Contact Starlight Energy to get your main panel inspected and ensure your home is ready for solar, EV charging, or battery storage.
Starlight Energy — Powering Homes for a Brighter Future
