Tankless Water Heater (Electric) in San Antonio — $443/yr to Run (13.5¢/kWh)
Your tankless water heater (electric) in San Antonio costs about $37/month at 13.5¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
San Antonio, TX Electricity Rate
13.5¢/kWh
Utility: CPS Energy
+4% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.22
9.0 kWh/day
Monthly Cost
$36.96
274 kWh/mo
Annual Cost
$443
3,285 kWh/yr
Lifetime (20yr)
$8,870
energy only
Monthly Cost Breakdown in San Antonio
| Period | kWh | San Antonio Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.22 | $1.17 | +$0.05 |
| Weekly | 63.0 | $8.51 | $8.19 | +$0.32 |
| Monthly | 273.8 | $36.96 | $35.59 | +$1.37 |
| Quarterly | 821.3 | $110.87 | $106.76 | +$4.11 |
| Annual | 3285.0 | $443.48 | $427.05 | +$16.43 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in San Antonio.
Daily
$1.22
Monthly
$36.96
Annual
$443
20-Year
$8,870
Energy Saving Tips for Tankless Water Heater (Electric) in San Antonio
- ✓San Antonio electricity rates are 4% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in San Antonio saves ~$89/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$67/year at San Antonio rates.
- ✓Provides hot water on demand with no standby loss
- ✓Flush annually to remove scale
- ✓Requires dedicated electrical circuit
ENERGY STAR Savings: Upgrading to an ENERGY STAR Tankless Water Heater (Electric) in San Antonio saves approximately $89/year at local rates — $1,774 over the appliance lifetime.
Highest-Cost Appliances in San Antonio, TX
See which appliances cost the most to run at San Antonio's 13.5¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,750/yr
$145.80/mo
Electric Furnace
HVAC · 10,000W
$1,215/yr
$101.25/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$887/yr
$73.91/mo
EV Charger (Level 2)
Garage · 7,200W
$875/yr
$72.90/mo
Boiler (Electric)
HVAC · 6,000W
$729/yr
$60.75/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$665/yr
$55.43/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$665/yr
$55.43/mo
Heat Pump
HVAC · 2,400W
$518/yr
$43.20/mo
Tankless Water Heater (Electric) Cost in Other Texas Cities
| City | Rate | Annual Cost | vs San Antonio |
|---|---|---|---|
| San Antonio (current) | 13.5¢ | $443 | — |
| Houston | 12.6¢ | $413 | $-31 |
| Dallas | 14.0¢ | $460 | +$16 |
| Austin | 14.3¢ | $470 | +$27 |
| Fort Worth | 14.3¢ | $469 | +$26 |
| El Paso | 14.2¢ | $467 | +$24 |
| Arlington | 12.4¢ | $408 | $-35 |
| Corpus Christi | 15.0¢ | $493 | +$50 |
| Plano | 12.0¢ | $395 | $-49 |
Tankless Water Heater (Electric) Energy Cost FAQ — San Antonio, TX
Understanding Tankless Water Heater (Electric) Energy Costs in San Antonio, TX
In a major metro like San Antonio, electricity demand is high and rates reflect the cost of maintaining infrastructure for 1.5 million residents. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at San Antonio's rate of 13.5¢/kWh costs approximately $443 per year — $16 more than the national average of $427.
San Antonio rates are 4% above the national average — a modest premium that adds $16 per year to Tankless Water Heater (Electric) operating costs. Over the appliance's 20-year lifespan, that's $329 in cumulative extra spending versus the national average.
With a cost of living index of 99, San Antonio is near the national median. The Tankless Water Heater (Electric)'s monthly cost of $36.96 represents a typical share of the average San Antonio electric bill of $129/month. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $89 per year at San Antonio rates.
San Antonio's moderate climate (avg 59.5°F) helps keep seasonal energy cost swings manageable for most appliances. A Tankless Water Heater (Electric) produces approximately 2.35 tons of CO2 annually at typical usage. San Antonio residents can reduce this footprint by choosing an ENERGY STAR certified unit, optimizing usage patterns, or investing in solar — see our solar savings calculator for San Antonio.
Compare All Energy Costs in San Antonio
See energy costs for 168+ household appliances at San Antonio's local electricity rate.