Check our math

 

energy savings cost reduction

According to the U.S. Department of Energy, to estimate the yearly fridge cost, one should take the maximum wattage of the fridge, divide by three, convert to kW by dividing by 1000, and multiply by the hours in a year (shown in the equation below).

P = I * V / 3000 * 24 * 365 [kWh]

So, for a current of 2.28 A, and an input voltage of 115 V, as an example, the total yearly power is 766 kWh. Now we take this number and multiply it by the cost of energy:

 
State Cost [$/kWh]
Alabama 0.0144
Alaska 0.0171
Arizona 0.0153
Arkansas 0.0157
California 0.0155
Colorado 0.0185
Connecticut 0.0132
Delaware 0.0175
D.C. 0.0155
Florida 0.0167
Georgia 0.0152
Hawaii 0.0192
Idaho 0.0122
Illinois 0.0146
Indiana 0.0205
Iowa 0.0144
Kansas 0.0166
Kentucky 0.0218
Louisiana 0.0154
Maine 0.0118
Maryland 0.0159
Massachusetts 0.0163
Michigan 0.0166
Minnesota 0.0151
Mississippi 0.0155
Missouri 0.0202
Montana 0.0175
Nebraska 0.0158
Nevada 0.0158
New Hampshire 0.0113
New Jersey 0.0148
New Mexico 0.0194
New York 0.0134
North Carolina 0.0150
North Dakota 0.0205
Ohio 0.0187
Oklahoma 0.0172
Oregon 0.0107
Pennsylvania 0.0154
Rhode Island 0.0167
South Carolina 0.0124
South Dakota 0.0118
Tennessee 0.0160
Texas 0.0143
Utah 0.0211
Vermont 0.0109
Virginia 0.0152
Washington 0.0107
West Virginia 0.0232
Wisconsin 0.0173
Wyoming 0.0225
 

So, on average, a consumer would save $91.92 per unit.

 

co2 emissions

To determine how many kilograms of CO2 are reduced through the use of these glasses, we have to start with the data. The non-partisan U.S. Energy Information Administration (EIA) provides us with the data from 2015. Table 1 enumerates the carbon emissions related to energy use per kWh.

Table 1: Energy Related Carbon Emissions by State

 
State Emissions [kg/kWh]
Alabama 0.0144
Alaska 0.0171
Arizona 0.0153
Arkansas 0.0157
California 0.0155
Colorado 0.0185
Connecticut 0.0132
Delaware 0.0175
D.C. 0.0155
Florida 0.0167
Georgia 0.0152
Hawaii 0.0192
Idaho 0.0122
Illinois 0.0146
Indiana 0.0205
Iowa 0.0144
Kansas 0.0166
Kentucky 0.0218
Louisiana 0.0154
Maine 0.0118
Maryland 0.0159
Massachusetts 0.0163
Michigan 0.0166
Minnesota 0.0151
Mississippi 0.0155
Missouri 0.0202
Montana 0.0175
Nebraska 0.0158
Nevada 0.0158
New Hampshire 0.0113
New Jersey 0.0148
New Mexico 0.0194
New York 0.0134
North Carolina 0.0150
North Dakota 0.0205
Ohio 0.0187
Oklahoma 0.0172
Oregon 0.0107
Pennsylvania 0.0154
Rhode Island 0.0167
South Carolina 0.0124
South Dakota 0.0118
Tennessee 0.0160
Texas 0.0143
Utah 0.0211
Vermont 0.0109
Virginia 0.0152
Washington 0.0107
West Virginia 0.0232
Wisconsin 0.0173
Wyoming 0.0225
 

So, on average, we can assume that the replacement of each unit reduces the carbon emissions of each restaurant by 12 kg per year.