ECC
$0.1834U.S. residential average · approximate · editable

A/B · Appliance comparison

Compare two appliances on equal assumptions.

See annual energy, operating cost, and lifetime difference using one rate and analysis horizon.

For a tariff calculation, include both supply and delivery charges per kWh. A state average includes revenue from fixed charges and taxes; do not add these again when using an average.Use your delivered electricity price, or keep the approximate average.
Choose how many years you expect to own or compare the appliance. Use the shorter of expected ownership and remaining useful life.
Model A
Look for watts (W) on the appliance nameplate, EnergyGuide label, product manual, or manufacturer specification. A plug-in power meter gives a measured value.
Estimate the hours this appliance actively runs on a typical day. A timer, smart plug, or usage log can improve this estimate.
Model B
Look for watts (W) on the appliance nameplate, EnergyGuide label, product manual, or manufacturer specification. A plug-in power meter gives a measured value.
Estimate the hours this appliance actively runs on a typical day. A timer, smart plug, or usage log can improve this estimate.
Checking the ECC API…

Annual cost difference

$21.42/year

Model A annual cost

$96.40

Model B annual cost

$74.97

The shared engine calculates a 12-year operating-cost difference of $257.05.

Model B saves $257.05 over 12 years
Model A
$96.40/yr
Model B
$74.97/yr

Source: Manual rate · June 2026 monthly average · User-provided calculation input · selected rate source: Government aggregate · approximate

Daily energy is estimated from rated power, runtime, and appliance quantity; annual energy uses the supplied days per year. · Costs apply the supplied manual flat rate uniformly to daily, average-monthly, and annual energy. · Analysis year 2026 labels the scenario; no calendar or rate escalation adjustment is applied. · Lifetime difference holds annual costs constant for 12 years.