Tankless Water Heater (Electric) in St. Petersburg — $426/yr to Run (13.0¢/kWh)
Your tankless water heater (electric) in St. Petersburg costs about $36/month at 13.0¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
St. Petersburg, FL Electricity Rate
13.0¢/kWh
Utility: Florida Power & Light
-0% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.17
9.0 kWh/day
Monthly Cost
$35.51
274 kWh/mo
Annual Cost
$426
3,285 kWh/yr
Lifetime (20yr)
$8,521
energy only
Monthly Cost Breakdown in St. Petersburg
| Period | kWh | St. Petersburg Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.17 | $1.17 | $-0.00 |
| Weekly | 63.0 | $8.17 | $8.19 | $-0.02 |
| Monthly | 273.8 | $35.51 | $35.59 | $-0.08 |
| Quarterly | 821.3 | $106.52 | $106.76 | $-0.25 |
| Annual | 3285.0 | $426.06 | $427.05 | $-0.99 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in St. Petersburg.
Daily
$1.17
Monthly
$35.51
Annual
$426
20-Year
$8,521
Energy Saving Tips for Tankless Water Heater (Electric) in St. Petersburg
- ✓St. Petersburg has below-average electricity rates, but saving energy still reduces your carbon footprint.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in St. Petersburg saves ~$85/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$64/year at St. Petersburg 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 St. Petersburg saves approximately $85/year at local rates — $1,704 over the appliance lifetime.
Highest-Cost Appliances in St. Petersburg, FL
See which appliances cost the most to run at St. Petersburg's 13.0¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,681/yr
$140.08/mo
Electric Furnace
HVAC · 10,000W
$1,167/yr
$97.28/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$852/yr
$71.01/mo
EV Charger (Level 2)
Garage · 7,200W
$840/yr
$70.04/mo
Boiler (Electric)
HVAC · 6,000W
$700/yr
$58.37/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$639/yr
$53.26/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$639/yr
$53.26/mo
Heat Pump
HVAC · 2,400W
$498/yr
$41.50/mo
Tankless Water Heater (Electric) Cost in Other Florida Cities
| City | Rate | Annual Cost | vs St. Petersburg |
|---|---|---|---|
| St. Petersburg (current) | 13.0¢ | $426 | — |
| Jacksonville | 14.3¢ | $471 | +$45 |
| Miami | 14.7¢ | $482 | +$56 |
| Tampa | 14.4¢ | $475 | +$49 |
| Orlando | 13.6¢ | $447 | +$21 |
| Hialeah | 13.1¢ | $429 | +$3 |
| Port St. Lucie | 15.5¢ | $509 | +$83 |
| Tallahassee | 14.6¢ | $479 | +$53 |
| Cape Coral | 13.7¢ | $450 | +$24 |
Tankless Water Heater (Electric) Energy Cost FAQ — St. Petersburg, FL
Understanding Tankless Water Heater (Electric) Energy Costs in St. Petersburg, FL
St. Petersburg is a mid-sized Florida city where residential electricity rates from Florida Power & Light are shaped by regional energy supply and local demand patterns. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at St. Petersburg's rate of 13.0¢/kWh costs approximately $426 per year — $1 less than the national average of $427.
Rates in St. Petersburg are close to the national average, so the Tankless Water Heater (Electric)'s annual cost of $426 is broadly representative of what most US households pay. Over the 20-year expected lifespan, total energy cost reaches $8,521.
With a cost of living index of 104, St. Petersburg is near the national median. The Tankless Water Heater (Electric)'s monthly cost of $35.51 represents a typical share of the average St. Petersburg electric bill of $155/month. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $85 per year at St. Petersburg rates.
St. Petersburg's moderate climate (avg 65.6°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. St. Petersburg 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 St. Petersburg.
Compare All Energy Costs in St. Petersburg
See energy costs for 168+ household appliances at St. Petersburg's local electricity rate.