Tankless Water Heater (Electric) in Washington — $446/yr to Run (13.6¢/kWh)
Your tankless water heater (electric) in Washington costs about $37/month at 13.6¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Washington, DC Electricity Rate
13.6¢/kWh
Utility: Pepco (Potomac Electric)
+4% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.22
9.0 kWh/day
Monthly Cost
$37.15
274 kWh/mo
Annual Cost
$446
3,285 kWh/yr
Lifetime (20yr)
$8,915
energy only
Monthly Cost Breakdown in Washington
| Period | kWh | Washington Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.22 | $1.17 | +$0.05 |
| Weekly | 63.0 | $8.55 | $8.19 | +$0.36 |
| Monthly | 273.8 | $37.15 | $35.59 | +$1.56 |
| Quarterly | 821.3 | $111.44 | $106.76 | +$4.68 |
| Annual | 3285.0 | $445.77 | $427.05 | +$18.72 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in Washington.
Daily
$1.22
Monthly
$37.15
Annual
$446
20-Year
$8,915
Energy Saving Tips for Tankless Water Heater (Electric) in Washington
- ✓Washington electricity rates are 4% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in Washington saves ~$89/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$67/year at Washington 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 Washington saves approximately $89/year at local rates — $1,783 over the appliance lifetime.
Highest-Cost Appliances in Washington, DC
See which appliances cost the most to run at Washington's 13.6¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,759/yr
$146.56/mo
Electric Furnace
HVAC · 10,000W
$1,221/yr
$101.77/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$892/yr
$74.30/mo
EV Charger (Level 2)
Garage · 7,200W
$879/yr
$73.28/mo
Boiler (Electric)
HVAC · 6,000W
$733/yr
$61.06/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$669/yr
$55.72/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$669/yr
$55.72/mo
Heat Pump
HVAC · 2,400W
$521/yr
$43.42/mo
Tankless Water Heater (Electric) Energy Cost FAQ — Washington, DC
Understanding Tankless Water Heater (Electric) Energy Costs in Washington, DC
In a major metro like Washington, electricity demand is high and rates reflect the cost of maintaining infrastructure for 0.7 million residents. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at Washington's rate of 13.6¢/kWh costs approximately $446 per year — $19 more than the national average of $427.
Washington rates are 4% above the national average — a modest premium that adds $19 per year to Tankless Water Heater (Electric) operating costs. Over the appliance's 20-year lifespan, that's $374 in cumulative extra spending versus the national average.
Washington has a high cost of living (index: 157), which means electricity is just one of many above-average expenses. Reducing appliance energy costs — even by small amounts — contributes to meaningful household savings in this market. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $89 per year at Washington rates.
Washington's moderate climate (avg 44.7°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. Washington 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 Washington.
Compare All Energy Costs in Washington
See energy costs for 168+ household appliances at Washington's local electricity rate.