Being an early adopter isn't cheap. If you have to have the latest gadget to save money on utilities, you've already spent thousands on a solar water heater or a geothermal heat pump.
For the rest of us wanting to save on a gas, electric or water bill, it has to be affordable, said Jim Barnes, manager of Home Depot in Brooklyn Park.
Here are six moderate options costing $19 to $50 that are recommended by Barnes, Mike Frattalone of Frattalone's Ace Hardware, Tina North of Moss Envy in Minneapolis, and Consumer Reports. All have the potential to save much more on your utility bill than the product's original investment.
Motion-activated light sockets and wall switches $20 to $30 at Menards, Frattalone's Ace Hardware and other hardware stores. No more rhetorical questions from the scold in the house asking, "Who's paying the light bill around here?" when lights are left on and no one's around. The sensor detects movement to turn lights on and shuts them off automatically within four minutes after you leave. Menards sells two models, one from First Alert (PIR720RN, $25) that senses movement in a 360-degree radius, and one from Westek (MLC2BC, $20) that detects movement in a 120-degree radius. Screw the sensor into an existing light socket and screw a lightbulb into the base of the new sensor. The WattStopper ($30 at Frattalone's) replaces the wall switch. Turn on the light at the wall switch and the WattStopper turns off the light automatically within a few minutes if no motion is detected.
Low-tech savings: Last one to leave turns out the light.
Smart Strip surge protector $29 to $40 for various models at hardware stores, or Moss Envy, Mpls., 612-374-4581, www.mossenvy.com. Reduce electricity usage from electronic devices such as TVs and computers that continue to draw power when off or in standby mode. Smart Strip surge protectors cut down on such "phantom" power usage when a device is not in use. Save an estimated $39 per year, according to the manufacturer.
Low-tech savings: Unplug the offending appliance when not in use or use a standard surge protector and shut off its power switch.
Refrigerator kit $20 at Target or Target.com. This device can save you money by showing the temperature inside your fridge. Ideally, it should be between 34 and 37 degrees. Use the temperature gauge to find out if you can turn the thermostat dial to a 4 instead of a 5. The monitor also has an alarm that goes off if the door is left open for 45 seconds or more.