Service
Electrical Panel Upgrades in San Antonio
100 amp to 200 amp is our specialty. Permitted, inspected, and built to code.
- Licensed and Insured
- BBB Accredited
- Veteran Owned
- TECL 41806
5.0 on Google, 11 reviewsas of October 2, 2026
Same day
Appointments available
Flat rate
Approved before work begins
TECL 41806
Licensed and insured
8am to 8pm
Open every day
Electrical emergency? Sparks, burning smell, or a dead panel: call (210) 446-5446 now
Emergency service$49 Off
Your First Service Call
New customers take $49 off their first diagnostic or service call with Wattsmith Electric.
New residential customers only. One per household. Valid on your first service call only. Not combinable with other offers. No cash value. Mention this offer when you book.
Our service guarantees
- We hit your window. Miss it with no heads-up, and that is $149 off.
- You approve one flat price before we touch a wire. No hourly meter.
- We protect your floors, haul our mess, and leave the space clean.
- Everything meets code and we stand behind it, or we come back and fix it.
Wattsmith Electric works to the 2023 National Electrical Code and pulls the permit where one is required. How we handle permits, inspections and the workmanship guarantee is on our standards page. The license, the coverage in force and our federal registrations, including the certificate of insurance process for contractors, are on insurance and licensing.
Why it does not pay to wait
An overloaded or obsolete panel is a daily fire risk, not a someday problem. Federal Pacific and Zinsco breakers have a documented history of failing to trip under fault, and a full panel forces dangerous double-taps. Every day you wait is another day running a known hazard.
Your panel is the heart of the house. A 100 amp panel wired in the 1980s was never meant to run a modern kitchen, a heat pump, an EV charger, and a shop out back. Upgrade it to 200 amp and you stop fighting for capacity every time you add a circuit.
We pull the permit, coordinate the utility disconnect, set the new panel, land every circuit clean and labeled, and get it inspected. You end up with headroom, a clear directory, and work that passes the first time.
Electrical panel upgrade and replacement work we handle
- 100 amp to 200 amp service upgrades
- Panel and meter combo replacements
- Federal Pacific and Zinsco panel replacement
- Sub-panel installation for shops, additions, and pools
- Whole-home surge protection added at the panel
- Permit, utility coordination, and inspection handled
Signs you need this
- You have a Federal Pacific or Zinsco panel
- The panel is full and you are out of breaker slots
- You are adding an EV charger, hot tub, or heat pump
- The panel is rusted, warm, or double-tapped
What you can check yourself first
Before you call, here is what you can safely check on your own. Even if you still call us, you will walk in knowing more than you did.
- Open the panel door and read the main breaker rating. 100 or 125 usually means an older service; 200 is modern.
- Look for the brand. A Federal Pacific (FPE) or Zinsco label is a known safety concern worth a call.
- Count your spare slots. If every slot is full or doubled up, you are out of room to add anything.
- Snap a photo of the panel label and the meter outside. That alone lets us give you a tighter number.
Straight pricing
In San Antonio, a 100 amp to 200 amp panel upgrade generally runs about 1,500 to 4,000 dollars, depending on your home.
What drives the number
- Panel and meter location, and whether the meter can and mast also need replacing
- The condition of the existing grounding and bonding, which older homes often lack
- Permit and utility coordination, which we handle
- Whether you add surge protection or a sub-panel at the same time
Wattsmith quotes the exact figure flat after we see the job, and you approve it before we start. The range is context, not your bill.
Free estimate. We come look at the panel, the meter, and the service, and give you a fixed price before anything starts.
- Up to three options on a job, each a real way to do it, priced flat. You choose the scope.
- The estimate is free. Nothing is owed until you approve the work.
- The price you approve is the price you pay.
Book your panel assessment
Flat-rate quote before any work starts. A Wattsmith electrician calls you back within 15 minutes during business hours.
Where we work
Panel Upgrades across the San Antonio metro
We bring panel upgrades to San Antonio and the surrounding communities. Find your area below or call and we will confirm we cover you.
- Panel Upgrades, Alamo Heights
- Panel Upgrades, Stone Oak
- Panel Upgrades, Helotes
- Panel Upgrades, Schertz
- Panel Upgrades, Converse
- Panel Upgrades, Universal City
- Panel Upgrades, Leon Valley
- Panel Upgrades, Boerne
- Panel Upgrades, New Braunfels
- Panel Upgrades, Cibolo
We do panel upgrades across the rest of the metro too, including Live Oak, Selma, Timberwood Park, Hollywood Park, Castle Hills, Windcrest, Kirby, Alamo Ranch, Westover Hills, Medical Center, Bulverde, Fair Oaks Ranch, Terrell Hills, Olmos Park, Shavano Park, Garden Ridge, Spring Branch, Canyon Lake, Seguin, Marion, Saint Hedwig, Adkins, La Vernia, Elmendorf, China Grove, Von Ormy, Somerset, Lytle, Castroville and Floresville.
Reviews
5.0 on Google, 11 reviewsas of October 2, 2026
FAQ
Panel Upgrades questions
Straight answers. If you do not see yours, call us and ask.
Most residential upgrades are a one-day job. There is a power-off window while we swap the panel and the utility reconnects. We schedule it so you are down for the shortest time possible.
Keep exploring
Related work and guides
Related services
Helpful guides
- Federal Pacific Panel Replacement, from Identification to Done
- What Panel Capacity an EV Charger Actually Needs
- Service Mast and Weatherhead Damage: Who Repairs What
- Zinsco Panel: What to Know, and How It Compares to Federal Pacific
- Electrical panel replacement cost, and what a 200 amp upgrade costs
- When the Main Breaker Keeps Tripping
- Cost to Rewire a House, and What Drives the Number
- Why Summer Is Hardest on Your Electrical Panel
- Panel Upgrades in Monte Vista Historic Homes
- Is Your Panel Ready for Solar in San Antonio?
Need panel upgrades done right?
Flat-rate pricing quoted up front. Licensed and insured. A Wattsmith electrician calls you back within 15 minutes during business hours.
- Licensed and Insured
- BBB Accredited
- Flat-Rate Pricing
- Background-Checked