Serving Castroville, TX Since 2006

    Castroville, TX
    Ambit Energy Electric Service, Rates & Plans

    Start service at a new address, pay your bill, manage your account, or transfer your electricity — all in one place. Castroville is in Texas's deregulated market, so you choose your provider.

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    Individual results vary. Savings not guaranteed.

    Local Services

    Castroville, TX Utility Setup Guide

    Castroville, located in Medina County in west central Texas, is a historic community founded by Alsatian settlers and known for its distinctive European heritage and picturesque setting along the Medina River. When you move to Castroville, you'll need to contact Oncor Electric Delivery for any power outages or issues with the poles, wires, and meters that serve your home—they are the transmission and distribution utility that owns that infrastructure. For your electricity plan, billing, and customer support, you'll work with Ambit Energy, your retail electric provider. This arrangement is standard throughout Texas's deregulated electricity market, where Oncor handles the regulated delivery while Ambit Energy offers competitive pricing and service options. Castroville's Hill Country location means hot summers that drive significant air conditioning usage, so plan for elevated cooling demand from June through September. Winter months are mild, keeping heating costs low for most of the year. When shopping for an electricity plan with Ambit Energy, focus on rates quoted at the 1,000 to 2,000 kWh monthly tier rather than the heavily advertised 500 kWh tier, since typical households in the area use substantially more than 500 kWh per month and will find better value over a full 12-month contract at the realistic usage level. Reviewing competitive rates in that range ensures you're comparing plans that actually match your home's consumption.

    Compare Castroville Energy Rates & Plans With Ambit Energy

    Showing 15 plans for Castroville, TX
    Usage:

    Budget Relief 12

    $50 Credit

    Earn $50 back when you use 1,000+ kWh in a month

    Term 12 MonthsRate Type Fixed
    16.5¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Texas Solar Buyback 24

    Solar

    Get paid for your excess solar energy

    Term 24 MonthsRate Type Fixed
    17.6¢
    per kWh at 1,000 kWh
    Sign Up Online

    Texas Solar Buyback 12

    Solar

    Get paid for your excess solar energy

    Term 12 MonthsRate Type Fixed
    17.6¢
    per kWh at 1,000 kWh
    Sign Up Online

    Lone Star Classic 24

    Fixed Rate

    Simple, straightforward fixed rate pricing

    Term 24 MonthsRate Type Fixed
    18.6¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Lone Star Classic 12

    Fixed Rate

    Simple, straightforward fixed rate pricing

    Term 12 MonthsRate Type Fixed
    18.6¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Secure Savings 24

    No Base Charge

    No base charge with automatic bill relief at higher usage

    Term 24 MonthsRate Type Fixed
    19.1¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Secure Savings 12

    Fixed Rate

    No base charge with automatic bill relief at higher usage

    Term 12 MonthsRate Type Fixed
    19.1¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Lone Star Plus 24

    Best Value

    Tiered pricing that rewards higher usage households

    Term 24 MonthsRate Type Fixed
    19.2¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Lone Star Plus 12

    Fixed Rate

    Tiered pricing with 12-month flexibility

    Term 12 MonthsRate Type Fixed
    19.2¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Free & Clear Nights 12

    Free Nights

    Free electricity every night from 9PM to 6AM

    Term 12 MonthsRate Type Fixed
    20.2¢
    per kWh at 1,000 kWh
    Sign Up Online

    Summer Break 24

    🌞 50% Off Summer🌞 50% Off Jun–Sep

    50% off energy charges from June through September

    Term 24 MonthsRate Type Fixed
    20.2¢
    per kWh at 1,000 kWh
    Summer effective: 13.1¢
    Sign Up Online

    Summer Break 12

    🌞 50% Off Summer🌞 50% Off Jun–Sep

    50% off energy charges from June through September

    Term 12 MonthsRate Type Fixed
    20.2¢
    per kWh at 1,000 kWh
    Summer effective: 13.1¢
    Sign Up Online

    Lone Star Flex

    No Contract

    No contract required, cancel anytime with no fee

    Term Month-to-MonthRate Type Variable
    20.3¢
    per kWh at 1,000 kWh
    Sign Up Online

    Ultimate Perks 24

    Rewards

    Get Reward Dollars monthly at restaurants, stores & more

    Term 24 MonthsRate Type Fixed
    20.6¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Ultimate Perks 12

    Rewards

    Get Reward Dollars monthly at restaurants, stores & more

    Term 12 MonthsRate Type Fixed
    20.6¢
    per kWh at 1,000 kWh
    with E-Plan Discount
    Sign Up Online

    Need help choosing a plan?

    📞 (361) 788-3521
    Disclaimer: Rates shown include TDU delivery charges and are based on the usage level selected. E-Plan discount requires enrollment in electronic billing. Actual rates may vary based on your specific usage and TDU area. See Electricity Facts Label for complete pricing details. Texas Electric Saver is an Independent Ambit Energy Consultant. Ambit Texas, LLC REP #10117. goambit.com/disclaimer

    Local Info

    Castroville, TX Utility & Government Contacts

    Verified numbers, addresses, and websites for services you'll need during your move.

    Oncor

    Power outage · grid operator

    Call Oncor for outages — not Ambit.

    City Hall

    Permits, utilities, general

    Police (non-emergency)

    Castroville Police Department

    County Courthouse

    Records, permits, court business

    Post Office

    USPS retail + mailing

    Frequently Asked

    Castroville Electricity Service FAQ

    About Castroville

    Who do I call for a power outage in Castroville?+
    Call Oncor Electric Delivery at (888) 313-4747. Oncor Electric Delivery maintains the wires and restores outages in the Castroville area. Your Ambit plan covers billing only.
    Which Ambit Energy plan offers the best value in Castroville?+
    At typical 1,000 kWh usage, Budget Relief 12 delivers the best fixed-rate value at 16.5¢/kWh (E-Plan included). For summer A/C months, the Summer Break plan offers 50% off energy charges June–September — often the strongest value when usage spikes.
    Is Ambit available in all Castroville ZIP codes?+
    Yes. Ambit serves all Castroville ZIP codes and surrounding areas in the same TDU territory.
    What nearby cities do you serve?+
    Atascosa, Lytle, Natalia, Von Ormy — all in Oncor Electric Delivery territory.
    How do I set up water service in Castroville?+
    Call Castroville Regional Water Authority at (830) 931-2260. Deposit may apply for new accounts. Setup typically completes in 1–3 business days.

    About the Texas Deregulated Market

    How long does it take to switch providers?+
    1 to 7 days, completed by your next meter read. No service interruption. New-address connections can usually happen same-day or next-day.
    What's the difference between Oncor and Ambit?+
    Oncor Electric Delivery owns the poles, wires, and meters (the Transmission & Distribution utility). Ambit is the retailer that sells your plan and sends your bill. You choose the retailer; the TDU is fixed by geography.
    Fixed vs variable rates — which should I pick?+
    Fixed locks your ¢/kWh for 12, 24, or 36 months. Variable can change monthly with wholesale prices. Most Texas households pick fixed for budget predictability, especially during summer peak months.
    What is the E-Plan discount?+
    Ambit's paperless billing discount — enroll in email-only billing and your rate drops by 0.2¢/kWh. Rates on this page assume E-Plan is enabled; add 0.2¢/kWh for paper billing.
    Do you have Spanish-language support?+
    Yes — our site is fully bilingual and phone support is available in Spanish. Ver esta página en español →

    Ready to switch in Castroville?

    Enroll in 5 minutes or call for help choosing a plan. Same-day and next-day connections available.

    Electric Bill Estimator

    Enter your current electric rate or your total bill and electricity usage to see how much you could potentially save before signing up or making the switch.

    ¢/kWh
    Disclaimer: Savings estimates are for illustration purposes only and are not guaranteed. Actual rates vary based on usage, location, and plan terms. Rates shown are at 2000 kWh usage level. E-Plan discount requires enrollment in electronic billing. Texas Energy Saver is an Independent Ambit Energy Consultant. Ambit Texas, LLC REP #10117.