Electrical Panel Upgrade Contractors in San Antonio, TX

San Antonio Panel Size Selection Guide

Signs Your San Antonio Electrical Panel Needs Upgrading

1. Breakers that trip frequently - particularly during summer AC peak; indicates overloaded circuits on the existing panel
2. Fuse box (not breaker panel) - any San Antonio home with a fuse box should be upgraded immediately; fuses are a fire risk and not insurable under most modern policies
3. Federal Pacific Stab-Lok or Zinsco panels - both brands known for breaker failure and fire risk; if your San Antonio home has one of these panels (common in 1960s-1970s San Antonio homes), replacement is urgent
4. Planning EV charger installation - a Level 2 EV charger requires a dedicated 40-50A, 240V circuit; most 100A San Antonio panels cannot accommodate this without upgrade
5. Adding major new loads - hot tub, pool pump, new HVAC system, or whole-home generator

San Antonio Winter Storm Uri Lessons

February 2021 Winter Storm Uri caused widespread electrical system failures across San Antonio. Many older San Antonio homes with 100A panels experienced circuit failures during the prolonged cold event when heating loads (backup electric heat, space heaters) pushed panels beyond capacity. Post-Uri electrical upgrades (panel upgrades, whole-home surge protection, generator transfer switches) surged in demand across Bexar County.

Frequently Asked Questions: Electrical Panel Upgrade in San Antonio

How much does an electrical panel upgrade cost in San Antonio?

San Antonio electrical panel upgrades: 100A to 200A upgrade 1,500-3,500; 200A panel replacement (same amperage) 1,000-2,500; 200A to 400A upgrade 2,500-5,000; subpanel installation 800-2,000. CPS Energy meter base upgrade (required for some older San Antonio homes) adds 300-700. Whole-house surge protection adds 300-800. EV charger circuit installation (concurrent with panel upgrade) runs 400-900. San Antonio panel upgrade costs are moderate compared to coastal metros - the competitive San Antonio electrical contractor market and lower cost of living translate to accessible pricing for Bexar County homeowners.

Do I need a permit for an electrical panel upgrade in San Antonio?

Yes - the City of San Antonio requires a permit for all electrical panel upgrades. The permit is pulled by the licensed electrical contractor (Master Electrician or company with Master on staff). CPS Energy is coordinated by the electrician for service disconnect and reconnect. Unpermitted panel work creates homeowner insurance issues and problems at resale. Always confirm your San Antonio electrician will pull the required permit before work begins.

What electrician license is required for panel upgrades in San Antonio?

Electrical panel upgrades in San Antonio must be performed by or under the direct supervision of a Texas Master Electrician. Verify the electrical contractor holds an active Texas Master Electrician license at TDLR License Search. Journeyman electricians can perform panel work under Master supervision but cannot independently pull permits or run an electrical business. Hiring an unlicensed electrician for San Antonio panel work creates fire risk, insurance exposure, and permit issues.

Should I upgrade from 100A to 200A in my San Antonio home?

Yes - for most San Antonio homes with central HVAC and standard modern appliances, a 200A panel is the appropriate minimum. San Antonio summer heat load (July-August) creates the highest electrical demand of any US season due to continuous central air conditioning operation. A 100A panel serving a San Antonio home with central HVAC, electric water heater, and standard appliances is at or near its rated capacity during summer peak. If you are adding an EV charger, pool pump, or additional HVAC unit, a 200A panel is required. The 1,500-3,500 cost of a 100A to 200A upgrade in San Antonio is one of the highest-value electrical investments available for an older San Antonio home.