Energy Guide

THP103 - ESTIMATING ENERGY USAGE

1. Plug any appliance into the AmWatt

2. Plug the AmWatt into any standard electrical outlet

3. Turn on the appliance

The reading displayed on the AmWatt screen is considered “Continuous” or “Running” watts or

amps. This number is useful for assisting you in determining the approximate sizes of the loads

in your home that might be connected to a generator and transfer switch. The THP103 is accurate

at +/- 5% for loads from 1 amp – 15 amps (120 watts – 1,875 watts).

You can also use the THP103 AmWatt Load Tester readings to estimate energy usage for most

household appliances. Remember, this is only an estimate as many appliances will draw more

power at different times – like a refrigerator. This information is derived from U.S. Department

of Energy website:

http://www.energysavers.gov/your_home/appliances/index.cfm/mytopic=10040

FORMULA FOR ESTIMATING ENERGY CONSUMPTION

(Continuous Wattage) x (Hours Used Per Day) ÷ 1,000 = Daily Kilowatt-hour (kWh)

consumption

Now that you have your daily consumption (kWh), you can use this to estimate how much this

appliance costs to run daily, weekly, monthly and annually.

(kWh) x (utility rate) = daily rate

(daily rate) x (days used in month) = monthly rate

(daily rate) x (number of days used in year) = annual rate

You just need your Utility Company’s rate per kWh consumed. You should find this

information on your Utility Bill. This rate is referred to as kilowatt cents per hour. The

national average is around 10 cents.

Example: Laptop Computer, 4 hours on per day.

This example assumes you have the computer on every day, with the computer drawing

200 watts continuously for 4 hours each day. The computer would be turned off the

remainder of the day.

AmWatt shows the computer runs at 200 continuous watts

(200 watts) x (4 hours per day) ÷ 1,000 = .8 (kWh)

Cost per day:

(.8 kWh) x (example utility rate .10) = $0.08

Cost per month:

($0.08) x (30 days in month) = $2.40

Cost per year:

($0.08) x (365 days in year) = $29.20

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THP103 - ESTIMATING ENERGY USAGE 1. Plug any appliance into the AmWatt 2. Plug the AmWatt into any standard electrical outlet 3. Turn on the appliance The reading displayed on the AmWatt screen is considered “Continuous” or “Running” watts or amps. This number is useful for assisting you in determining the approximate sizes of the loads in your home that might be connected to a generator and transfer switch. The THP103 is accurate at +/- 5% for loads from 1 amp – 15 amps (120 watts – 1,875 watts).