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The Sense Home Energy Monitor costs $299 (£240 and AU$390 at the current exchange rate).

Published: / Caption: / Photo: Tyler Lizenby/CNET

The installation should be handed by an electrician since it requires opening the electric panel.

Published: / Caption: / Photo: Tyler Lizenby/CNET

Sense tracks your home's energy usage in real time.

Published: / Caption: / Photo: Tyler Lizenby/CNET

Track the total energy your home is generating at any given time and let Sense detect individual devices for itemized stats.

Published: / Caption: / Photo: Tyler Lizenby/CNET

The Sense app makes it easy to view your total usage -- but it can take weeks for it to differentiate among appliances.

Published: / Caption: / Photo: Tyler Lizenby/CNET
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