Fixed-rate electricity plans lock in your price per kWh for the full length of your contract — typically 6, 12, or 24 months. That means your energy charge stays exactly the same whether summer demand spikes or wholesale prices surge. For Sienna households on CenterPoint Energy, a fixed-rate plan is the single best way to protect your budget from price volatility and avoid bill shock during Texas heat waves.
All rates in ¢/kWh for ZIP 77459. CenterPoint Energy delivery fee billed separately. Updated daily from licensed Texas REP data.
| Provider / Plan | 1,000 kWh ★ | Term | Action |
|---|---|---|---|
| Chariot Energy GridPlus 12 100% Renewable |
7¢ | 12 mo | Enroll → |
| Discount Power Bill Credit Bundle 13 22% Renewable |
7.2¢ | 13 mo | Enroll → |
| Cirro Energy Bill Bonus 11 22% Renewable |
7.2¢ | 11 mo | Enroll → |
| Just Energy Sustainable Living Bundle - 6 31% Renewable |
11.6¢ | 6 mo | Enroll → |
| Amigo Energy Sustainable Simply Days - 6 31% Renewable |
11.6¢ | 6 mo | Enroll → |
| True Power True Value 12 15% Renewable |
11.6¢ | 12 mo | Enroll → |
| Budget Power No Gimmicks 12 35% Renewable |
11.7¢ | 12 mo | Enroll → |
| Gexa Energy Gexa Eco Choice 12 100% Renewable |
12.1¢ | 12 mo | Enroll → |
| Frontier Utilities Frontier Power Saver 12 30% Renewable |
12.1¢ | 12 mo | Enroll → |
| Companion Energy Companion + Perks 12 30% Renewable |
12.1¢ | 12 mo | Enroll → |
| Southern Federal Power Llc SoFed Better Rate - 12 6% Renewable |
12.3¢ | 12 mo | Enroll → |
| Varsity Energy Llc HOMERUN 12 31% Renewable |
12.3¢ | 12 mo | Enroll → |
| Sfe Energy Texas Inc SFE RewardsPlus - 12 35% Renewable |
12.4¢ | 12 mo | Enroll → |
| Ranchero Power Ranchero Smart & Fixed - 12 6% Renewable |
12.4¢ | 12 mo | Enroll → |
| Ae Texas Smart Secure 36 35% Renewable |
12.7¢ | 36 mo | Enroll → |
| Bkv Energy Daisy 13 29% Renewable |
12.7¢ | 13 mo | Enroll → |
| Rhythm Digital Choice 24 100% Renewable |
12.8¢ | 24 mo | Enroll → |
| Energy Texas No Bull 24 100% Renewable |
12.8¢ | 24 mo | Enroll → |
| Texans Choice Power Llc Choose 12 37% Renewable |
12.9¢ | 12 mo | Enroll → |
| Cleansky Energy Embrace Green 24 - New Customer Special 100% Renewable |
13¢ | 24 mo | Enroll → |
| Abundance Energy Clean Energy 12 100% Renewable |
13¢ | 12 mo | Enroll → |
| Spark Energy Llc Choose 12 37% Renewable |
13.1¢ | 12 mo | Enroll → |
| Ap Gas & Electric (tx) Llc TrueClassic 36 6% Renewable |
13.2¢ | 36 mo | Enroll → |
| Revolution Energy Llc Stars and Stripes 18 24% Renewable |
13.3¢ | 18 mo | Enroll → |
| Octopus Energy OctopusFlex 100% Renewable |
13.3¢ | 12 mo | Enroll → |
| Trieagle Energy Lp Sure Value 36 3% Renewable |
13.5¢ | 36 mo | Enroll → |
| Txu Energy Value Edge 12 3% Renewable |
13.5¢ | 12 mo | Enroll → |
| Base Power Base Energy 36 100% Renewable |
13.6¢ | 36 mo | Enroll → |
| Good Charlie & Co Llc GoodEnergy 36 26% Renewable |
13.7¢ | 36 mo | Enroll → |
| Octopus Energy Llc Octo Simple 14 100% Renewable |
13.7¢ | 14 mo | Enroll → |
| Champion Energy Services Llc Free Weekends-24 26% Renewable |
13.8¢ | 24 mo | Enroll → |
| Heritage Power Llc Bright Start 12 - $25 credit on your first bill! 25% Renewable |
14.1¢ | 12 mo | Enroll → |
| Pronto Power Summer 2026 26% Renewable |
14.5¢ | 2 mo | Enroll → |
| Think Energy Think Clean 24 100% Renewable |
14.5¢ | 24 mo | Enroll → |
| Atlantex Power Luminous 36 35% Renewable |
14.7¢ | 36 mo | Enroll → |
| Infuse Energy Essential Infusion 3 24% Renewable |
14.7¢ | 3 mo | Enroll → |
| Tara Energy Basics PTC - 36 31% Renewable |
14.9¢ | 36 mo | Enroll → |
| Constellation Newenergy Inc 12 Month A/C Protect Plus for 2 Units 26% Renewable |
14.9¢ | 12 mo | Enroll → |
| Smartenergy Holdings Llc SmartGreen 24 $200 Bill Credit 100% Renewable |
14.9¢ | 24 mo | Enroll → |
| Reliant Reliant Power On 24 Plan 24% Renewable |
15¢ | 24 mo | Enroll → |
| Direct Energy Autopay Texas 36 24% Renewable |
15.1¢ | 36 mo | Enroll → |
| Green Mountain Energy Company Pollution Free e-Plus 24 Choice 100% Renewable |
15.3¢ | 24 mo | Enroll → |
| Payless Power PTC 6 Month - Prepaid 26% Renewable |
17¢ | 6 mo | Enroll → |
★ 1,000 kWh is the Texas standard usage benchmark. Rates include energy charge; TDSP delivery fees billed separately.
Fixed pricing gives you predictability. You know exactly what you'll pay per kWh the day you enroll — and that rate doesn't change until your contract ends. This is especially valuable in Sienna, where August temperatures routinely push electricity demand (and spot prices) to their highest levels of the year. Most fixed-rate plans also include a straightforward cancellation fee, so you can switch if a better deal appears.