Received our Kill A Watt from the Alternative Energy Store www.altenergystore.com to figure out electrical consumption  of our rechargeable votive candles to determine solar panel size. We want to re-charge our table votive candles with solar renewable energy. To use the device you just have to plug an appliance and it will assess how efficient they really are. You can figure out your electrical expense by appliance by the day, week or month. Also you can evaluate the  quality of the electrical power provided from your utility company. We will do a chart with all our electric appliances and consumption to determine energy usage. Some refrigerators are 16 years old, it might be better to dispose and lease a new energy efficient one.