Thunder Electric
12026 Colwick St Ste A , San Antonio, TX 78216-2719
BBB Accredited A+ rated. Electrician, Electrical Contractors, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
Need electrical panel upgrade with bad credit financing in San Antonio but worried about credit? Many of our 45 contractors offer financing through credit unions, buy-now-pay-later programs, and in-house payment plans — approval not based solely on credit score.
Typical cost in San Antonio
$1,200–$4,500 / project
45 contractors in San Antonio
12026 Colwick St Ste A , San Antonio, TX 78216-2719
BBB Accredited A+ rated. Electrician, Electrical Contractors, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
3535 Metro Parkway , San Antonio, TX 78247
Heating and Air Conditioning, Plumber, Electrician ...
Serves: 78201, 78202, 78203, 78204 +52 more
247 W Olmos Dr , San Antonio, TX 78212-1957
BBB Accredited A+ rated. Commercial Electrician, Electrician, Electrical Contractors ...
Serves: 78201, 78202, 78203, 78204 +52 more
4729 Shavano Oak , San Antonio, TX 78249-4020
BBB Accredited A+ rated. Electrician, Electrical Contractors, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
12106B Valliant St , San Antonio, TX 78216
BBB Accredited A+ rated. Electrician, Electrical Contractors, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
318 W Nakoma St , San Antonio, TX 78216-2621
BBB Accredited A+ rated. Construction, Roofing Contractors, Electrician ...
Serves: 78201, 78202, 78203, 78204 +52 more
12123 Jones Maltsberger Rd , San Antonio, TX 78247-4202
BBB Accredited A+ rated. Electrical Contractors, Electrician, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
1842 Bandera Rd , San Antonio, TX 78228-3801
BBB Accredited A+ rated. Electrician, Electrical Contractors, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
San Antonio, TX 78237-1559
BBB Accredited A+ rated. Electrician, Electrical Contractors, Commercial Electrician
Serves: 78201, 78202, 78203, 78204 +52 more
12829 Wetmore Rd , San Antonio, TX 78247-3628
BBB Accredited A+ rated. Electrician, Electrical Contractors, Landscape Lighting ...
Serves: 78201, 78202, 78203, 78204 +52 more
5903 Danny Kaye Drive , San Antonio, TX 78240
BBB Accredited A+ rated. Electrical Contractors, Electrician, Electrical Wiring ...
Serves: 78201, 78202, 78203, 78204 +52 more
San Antonio, TX 78238-5156
BBB Accredited A+ rated. Electrician, Electrical Contractors, Commercial Electrician
Serves: 78201, 78202, 78203, 78204 +52 more
San Antonio electrical panel upgrades are driven by three primary forces: the large inventory of older homes in established neighborhoods (Alamo Heights, Olmos Park, Monte Vista, King William, and South San Antonio) with 100-amp or older 60-amp service panels that cannot support modern electrical loads; the dramatic growth of EV ownership and EV charger installation in San Antonio Bexar County; and the aftermath of Winter Storm Uri (February 2021) which revealed electrical system vulnerabilities and triggered significant home infrastructure investment across the San Antonio metro.
| Service | San Antonio Price Range |
|---|---|
| 100A to 200A panel upgrade | 1,500-3,500 |
| 200A panel replacement (same amperage) | 1,000-2,500 |
| 200A to 400A panel upgrade | 2,500-5,000 |
| Subpanel installation (60A-100A) | 800-2,000 |
| Meter base upgrade (if required by CPS Energy) | 300-700 additional |
| Grounding electrode system upgrade | 200-600 additional |
| AFCI/GFCI breaker upgrades (whole house) | 500-1,500 |
| Whole house rewiring + panel upgrade | 8,000-25,000 |
| EV charger circuit (40A, 240V) installation | 400-900 |
| Generator transfer switch installation | 500-1,500 |
| Surge protection device (whole home) | 300-800 installed |
CPS Energy coordination. CPS Energy is the San Antonio municipal utility serving the majority of Bexar County. Panel upgrades require CPS Energy to disconnect and reconnect service and, in some cases, upgrade the meter base or service drop from the street. CPS Energy coordination adds 3-7 business days to San Antonio panel upgrade timelines. The San Antonio electrician handles CPS Energy scheduling as part of the upgrade process.
BLS SOC 47-2111 Electricians for the San Antonio-New Braunfels MSA reflects regional electrical labor costs.
San Antonio heat and panel load. San Antonio summer heat load (July average 95 F; over 100 days of 90+ heat per year) drives high HVAC electrical demand. Homes with aging 100A panels running central air conditioning are particularly at risk of overloaded circuits during July-August peak demand. Panel upgrades to 200A are strongly recommended for San Antonio homes with central HVAC, electric water heaters, and modern appliances.
Electrical panel upgrades in San Antonio are regulated work that requires a Texas-licensed electrician. The Texas Department of Licensing and Regulation (TDLR) licenses electricians in Texas at three levels:
For San Antonio panel upgrades, verify:
San Antonio permit requirement. City of San Antonio requires a building permit for electrical panel upgrades, pulled by the licensed electrical contractor. Apply at City of San Antonio Development Services. CPS Energy must be notified of the panel upgrade - the licensed electrician coordinates with CPS Energy for service disconnect and reconnect.
Why permits matter for San Antonio panel upgrades: Unpermitted panel work creates homeowner insurance issues (insurers may deny claims for electrical fires in unpermitted systems) and problems at resale. San Antonio home inspectors regularly identify unpermitted panel work during point-of-sale inspections.
| Panel Size | Monthly Typical San Antonio Use | Best For |
|---|---|---|
| 100A (existing, aging) | Up to 10,000-15,000 kWh/year | Very small home; no EV; window AC only; often undersized for modern loads |
| 200A | Up to 30,000 kWh/year | Standard San Antonio home; central HVAC; modern appliances; single EV charger |
| 400A (dual 200A) | Large estate; high-demand loads | San Antonio homes with multiple HVAC units, pool pump, EV chargers, workshop |
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.
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