Man Retrofits Freezer to Make an Ultra-Efficient Fridge

by Justin Thomas •

An off-grid experimenter in Australia, Tom Chalko, has retrofitted a chest freezer to create a fridge that uses only 100 watt-hours (0.1 kWh) per day! Why a chest freezer? Tom points out that vertical door refrigerators are inherently inefficient. As soon as you open a vertical fridge door the cold air escapes, simply because it is heavier than the warmer …


Whole House Energy Monitor

by Justin Thomas •

This handy device monitors the amount of electricity a house is using and displays the information in real-time through its LED display. You can see, for example, the kilo-watt hours being used, or the calculated cost per day. It also projects the next electric bill, based upon local rates. The monitor itself sells for $200, which could actually buy you …

NovaKool RU7600-DC

by Justin Thomas •

Power Consumption: 480 watt hours/day or 240 watt hours /day with insulation (70°F day) Capacity: 7 cu. ft. Dimensions: 18.5" W, 41" H, 28" D Shipping weight: 138 lb. Power: 12 or 24V DC Best Price: $1196 (E-Marine)